DL-50 engine
09-16-2008 | 11:11 PM
#3051
Senior Member
Joined: Oct 2007
Posts: 119
Likes: 0
Received 0 Likes
on
0 Posts
From: Western Australia, AUSTRALIA
RE: DL-50 engine
ORIGINAL: kruzin55
Tonight I got my new DL 50 mounted on my new Goldberg Extra 330 that I found online from Graves RC in Florida. I bought the last Goldberg Extra 330 I could find online as well as a Goldberg Edge 540. Both planes are 77" . I plan on mounting a DL50 on the Edge next. I had lost my first Goldberg Extra 330 three weeks ago when my "buddy" crashed it by pile driving it into the runway. Post-mortem found that we had lost power to the Spectrum AR7000. Must have had a bad battery or broke a connection as he was churning the sky. Plane was a total loss as the motor was 8 inches in the dirt. The old-style aluminum mounts were mangled and one of the mounting ears broke off the engine casting. Muffler was also crushed. Although I did save all the electronicsall servos and receiver. Still I'm worried that the motor bearings or shaft may be damaged. It's currently with Bob at DLUSA for an estimate of repairs.
Because I'm impatient, I had him send me a new DL50. This time I'm using dual batteries on a Smart-Fly PowerExpander with voltage regulator to a JR R921 receiver with four antennas. Talk about redundency!
Unfortunately, I just now found that my new Vess 22B prop won't fit because the the stock prop bolts are not long enough to fit through the thicker Vess prop.
Two questions. Does anyone know what size these four prop bolts are? They appear to be metric because none of my standard cap head bolts match. Also, I plan on running the engine tomorrow, but I have a gallon of 32:1 gas already mixed with Ryobi 4-stroke oil that I use on my Quadra 52 in my Giant Aeromaster. That gas/oil mixture seems to work fine on the Quadra. I do have some Lawnboy smokeless, but didn't want to (nor know where to) dispose of the gas I have already mixed. Do you think it will be a problem to use the Ryobi for the first gallon of break-in on the DL50.
Tonight I got my new DL 50 mounted on my new Goldberg Extra 330 that I found online from Graves RC in Florida. I bought the last Goldberg Extra 330 I could find online as well as a Goldberg Edge 540. Both planes are 77" . I plan on mounting a DL50 on the Edge next. I had lost my first Goldberg Extra 330 three weeks ago when my "buddy" crashed it by pile driving it into the runway. Post-mortem found that we had lost power to the Spectrum AR7000. Must have had a bad battery or broke a connection as he was churning the sky. Plane was a total loss as the motor was 8 inches in the dirt. The old-style aluminum mounts were mangled and one of the mounting ears broke off the engine casting. Muffler was also crushed. Although I did save all the electronicsall servos and receiver. Still I'm worried that the motor bearings or shaft may be damaged. It's currently with Bob at DLUSA for an estimate of repairs.
Because I'm impatient, I had him send me a new DL50. This time I'm using dual batteries on a Smart-Fly PowerExpander with voltage regulator to a JR R921 receiver with four antennas. Talk about redundency!
Unfortunately, I just now found that my new Vess 22B prop won't fit because the the stock prop bolts are not long enough to fit through the thicker Vess prop.
Two questions. Does anyone know what size these four prop bolts are? They appear to be metric because none of my standard cap head bolts match. Also, I plan on running the engine tomorrow, but I have a gallon of 32:1 gas already mixed with Ryobi 4-stroke oil that I use on my Quadra 52 in my Giant Aeromaster. That gas/oil mixture seems to work fine on the Quadra. I do have some Lawnboy smokeless, but didn't want to (nor know where to) dispose of the gas I have already mixed. Do you think it will be a problem to use the Ryobi for the first gallon of break-in on the DL50.
Please ensure you use the correct metric thread bolts, as you dont want these ones coming free!
5mm Metric.
Dont know about the oil, not familer with it. But for the sake of a few $ would recommend starting with fresh batch of known type.
09-16-2008 | 11:16 PM
#3052
My Feedback: (2)
RE: DL-50 engine
ORIGINAL: kruzin55
Two questions. Does anyone know what size these four prop bolts are? They appear to be metric because none of my standard cap head bolts match. Also, I plan on running the engine tomorrow, but I have a gallon of 32:1 gas already mixed with Ryobi 4-stroke oil that I use on my Quadra 52 in my Giant Aeromaster. That gas/oil mixture seems to work fine on the Quadra. I do have some Lawnboy smokeless, but didn't want to (nor know where to) dispose of the gas I have already mixed. Do you think it will be a problem to use the Ryobi for the first gallon of break-in on the DL50.
Two questions. Does anyone know what size these four prop bolts are? They appear to be metric because none of my standard cap head bolts match. Also, I plan on running the engine tomorrow, but I have a gallon of 32:1 gas already mixed with Ryobi 4-stroke oil that I use on my Quadra 52 in my Giant Aeromaster. That gas/oil mixture seems to work fine on the Quadra. I do have some Lawnboy smokeless, but didn't want to (nor know where to) dispose of the gas I have already mixed. Do you think it will be a problem to use the Ryobi for the first gallon of break-in on the DL50.
Myself I would dump the gas and mix up the Lawnboy ashless for break in.
09-16-2008 | 11:26 PM
#3053
Senior Member
My Feedback: (2)
Joined: Jul 2008
Posts: 369
Likes: 0
Received 0 Likes
on
0 Posts
From: Miami beach, FL
RE: DL-50 engine
ORIGINAL: kruzin55
Because I'm impatient, I had him send me a new DL50. This time I'm using dual batteries on a Smart-Fly PowerExpander with voltage regulator to a JR R921 receiver with four antennas. Talk about redundency!
Unfortunately, I just now found that my new Vess 22B prop won't fit because the the stock prop bolts are not long enough to fit through the thicker Vess prop.
Two questions. Does anyone know what size these four prop bolts are? They appear to be metric because none of my standard cap head bolts match. Also, I plan on running the engine tomorrow, but I have a gallon of 32:1 gas already mixed with Ryobi 4-stroke oil that I use on my Quadra 52 in my Giant Aeromaster. That gas/oil mixture seems to work fine on the Quadra. I do have some Lawnboy smokeless, but didn't want to (nor know where to) dispose of the gas I have already mixed. Do you think it will be a problem to use the Ryobi for the first gallon of break-in on the DL50.
Because I'm impatient, I had him send me a new DL50. This time I'm using dual batteries on a Smart-Fly PowerExpander with voltage regulator to a JR R921 receiver with four antennas. Talk about redundency!
Unfortunately, I just now found that my new Vess 22B prop won't fit because the the stock prop bolts are not long enough to fit through the thicker Vess prop.
Two questions. Does anyone know what size these four prop bolts are? They appear to be metric because none of my standard cap head bolts match. Also, I plan on running the engine tomorrow, but I have a gallon of 32:1 gas already mixed with Ryobi 4-stroke oil that I use on my Quadra 52 in my Giant Aeromaster. That gas/oil mixture seems to work fine on the Quadra. I do have some Lawnboy smokeless, but didn't want to (nor know where to) dispose of the gas I have already mixed. Do you think it will be a problem to use the Ryobi for the first gallon of break-in on the DL50.
As for the Vess 22B you want 5mm x .8 x 50mm. These are hard to get. I got mine from boltdepot.com "Metric socket head screws, Steel grade 12.9, 5mm x .8 x 50mm"
And definitely use the Lawnboy Ashless 32:1 3 gallons. Do the environment a favor plz and dump the 4-stroke mixture in your car or get a cheapo gas can at your local gas station.
09-16-2008 | 11:48 PM
#3054
Joined: Jun 2007
Posts: 60
Likes: 0
Received 0 Likes
on
0 Posts
From: Frankfort,
IL
RE: DL-50 engine
Thanks for the info and advice. I thought the power expander was a good idea so that I had the dual batteries and the voltage regulator. Also, I did not think I could put the gas/oil in the car. I would sure hate to have to spend money to repair the Dodge Hemi.
09-16-2008 | 11:57 PM
#3055
Senior Member
My Feedback: (2)
Joined: Jul 2008
Posts: 369
Likes: 0
Received 0 Likes
on
0 Posts
From: Miami beach, FL
RE: DL-50 engine
ORIGINAL: kruzin55
Thanks for the info and advice. I thought the power expander was a good idea so that I had the dual batteries and the voltage regulator. Also, I did not think I could put the gas/oil in the car. I would sure hate to have to spend money to repair the Dodge Hemi.
Thanks for the info and advice. I thought the power expander was a good idea so that I had the dual batteries and the voltage regulator. Also, I did not think I could put the gas/oil in the car. I would sure hate to have to spend money to repair the Dodge Hemi.
Your Dodge will love the extra oil
Keep in mind that one drop of oil is enough to pollute 12 square meters/130 sq ft of surface water. Just my $.02Edit:
http://electrodynam.com/store/product224.html
5x Hitec 7955TG, 1x HS-5245MG throttle and 1x HS-81 choke. Usage is 29mA per minute, so with a 2300mah A123 good for max 79 minutes flight time. I always recharge after 5 12 minute flights.
Look on Hobby City (RCU deletes links to this site???) for:
IMAX Power Supply 100~240v 5A and Turnigy Accucel-6 50W 5A Balancer/Charger
And with a 12-volt battery you can charge at the field.
http://tweakshop.net/DL50-install/6.jpg
09-17-2008 | 07:22 AM
#3056
RE: DL-50 engine
ORIGINAL: nedyob
Hello Krproton,
After you replaced the bearings in your DL50, did you go right back to the 80:1 mix or do you have to start over and run your mix at 32:1. I got my DL50 used and I think its the first version that DL came out with because it has the smaller mounting lugs on the engine.
I was installing my Pitts muffler on my DL50 to night and was able to look at the top of my piston and theres deffinately carbon on the top of the piston.
I am also planning to run Amzoil Saber, so I take that it will be okay to run it 80:1
The guy I bought the engine/plane from broke it in on Lawn Boy at 42:1. He's had the DL50 for about two yrs. and has over 3 to 4 gallons through it. The compression seems to be good and strong. Should I look into sending the DL50 it to get it updated or wait until it needs work done on it?
I haven't had the chance to start it up because Im still i the procees to building the plane and haven't got all the servo's bought and installed.
Also how do I program the throttle servo while the engine is on the plane, I can't see the butterfly valve to make sure where Im at as fare as full throttle and idle. I will be installing a opto kill on the igition, and may program a throttle cut on my 10C to work with the opiti kill switch.
Thanks for you help.
NEDYOB
Hello Krproton,
After you replaced the bearings in your DL50, did you go right back to the 80:1 mix or do you have to start over and run your mix at 32:1. I got my DL50 used and I think its the first version that DL came out with because it has the smaller mounting lugs on the engine.
I was installing my Pitts muffler on my DL50 to night and was able to look at the top of my piston and theres deffinately carbon on the top of the piston.
I am also planning to run Amzoil Saber, so I take that it will be okay to run it 80:1
The guy I bought the engine/plane from broke it in on Lawn Boy at 42:1. He's had the DL50 for about two yrs. and has over 3 to 4 gallons through it. The compression seems to be good and strong. Should I look into sending the DL50 it to get it updated or wait until it needs work done on it?
I haven't had the chance to start it up because Im still i the procees to building the plane and haven't got all the servo's bought and installed.
Also how do I program the throttle servo while the engine is on the plane, I can't see the butterfly valve to make sure where Im at as fare as full throttle and idle. I will be installing a opto kill on the igition, and may program a throttle cut on my 10C to work with the opiti kill switch.
Thanks for you help.
NEDYOB
Since I didn't repalce the piston, rings or cylinder, no need to go through break-in procedure. Just went back to 80:1.
I don't know if you need to update or what. I'd find out what problems (if any) the version has. I mean, the thing isn't going to fall apart or explode or anything, right?
Don't know anything about the kill switch. The way I program the endpoints is to disconnect the pushrod from the carb arm. Set your eneponits so the pushrod will be in the same position the carb arm is when the carb is fully open and closed.
Can add more to my response later if needed.
09-17-2008 | 09:20 AM
#3057
Senior Member
Joined: Nov 2004
Posts: 283
Likes: 0
Received 0 Likes
on
0 Posts
From: Oxfordshire, UNITED KINGDOM
RE: DL-50 engine
Guys, I'm no engine expert, but i do have 3 DL's. The oldest is a version 1 engine with at least 12 - 15 gallons on it now, the others probably have about 4 - 5 gallons each through them. I just wanted to share my experiences on break in and oil.
I simply ran all motors on 50:1 synthetic from day 1, and are on the same mix now and have proved super super reliable, powerful, tractable and a joy to own
As for break in...just make sure the motor ticks over reliably and then go fly the thing...just be aware of fuel consumption when new. I got 8 minutes max on a 26 ox tank when the motor was new, now 26 oz is good for 14 minutes with some left in reserve.
Just my 2c...
I simply ran all motors on 50:1 synthetic from day 1, and are on the same mix now and have proved super super reliable, powerful, tractable and a joy to own
As for break in...just make sure the motor ticks over reliably and then go fly the thing...just be aware of fuel consumption when new. I got 8 minutes max on a 26 ox tank when the motor was new, now 26 oz is good for 14 minutes with some left in reserve.
Just my 2c...
09-17-2008 | 10:15 AM
#3058
Senior Member
My Feedback: (2)
Joined: Jul 2008
Posts: 369
Likes: 0
Received 0 Likes
on
0 Posts
From: Miami beach, FL
RE: DL-50 engine
ORIGINAL: wavy777
Guys, I'm no engine expert, but i do have 3 DL's. The oldest is a version 1 engine with at least 12 - 15 gallons on it now, the others probably have about 4 - 5 gallons each through them. I just wanted to share my experiences on break in and oil.
I simply ran all motors on 50:1 synthetic from day 1, and are on the same mix now and have proved super super reliable, powerful, tractable and a joy to own
As for break in...just make sure the motor ticks over reliably and then go fly the thing...just be aware of fuel consumption when new. I got 8 minutes max on a 26 ox tank when the motor was new, now 26 oz is good for 14 minutes with some left in reserve.
Just my 2c...
Guys, I'm no engine expert, but i do have 3 DL's. The oldest is a version 1 engine with at least 12 - 15 gallons on it now, the others probably have about 4 - 5 gallons each through them. I just wanted to share my experiences on break in and oil.
I simply ran all motors on 50:1 synthetic from day 1, and are on the same mix now and have proved super super reliable, powerful, tractable and a joy to own
As for break in...just make sure the motor ticks over reliably and then go fly the thing...just be aware of fuel consumption when new. I got 8 minutes max on a 26 ox tank when the motor was new, now 26 oz is good for 14 minutes with some left in reserve.
Just my 2c...
For me a 20oz tank is good for 15 minutes 3D flight with a quarter tank left. I set my timer to 12 minutes to be on the safe side.
Everyone has its own philosophy re breaking engines in, however using a mineral oil for the first gallons helps discharging metal debris. This results in a better compression and better compression equals more power.
09-17-2008 | 02:02 PM
#3059
My Feedback: (17)
Joined: Nov 2002
Posts: 1,427
Likes: 0
Received 0 Likes
on
0 Posts
From: Goodyear, AZ
RE: DL-50 engine
wavy777
Wow, that's a lot of fuel consumption. Are we on the same units of measure? I ran my DL50 pretty much wide open last time out for 12 minutes, which is the first time I've done that, and used around 12-13 oz out of a 16oz tank. It kind of scared me because it burned so much fuel as compared to what I normally burn in a 12 min flight.
Chuck
Wow, that's a lot of fuel consumption. Are we on the same units of measure? I ran my DL50 pretty much wide open last time out for 12 minutes, which is the first time I've done that, and used around 12-13 oz out of a 16oz tank. It kind of scared me because it burned so much fuel as compared to what I normally burn in a 12 min flight.
Chuck
09-17-2008 | 06:13 PM
#3060
Senior Member
My Feedback: (67)
Joined: Feb 2002
Posts: 1,381
Likes: 0
Received 0 Likes
on
0 Posts
From: NORTHWOOD,
IA
RE: DL-50 engine
Hi KRPROTON,
This is a dumb question then, went moving the trottle arm, witch way is open and witch way is closed? when throttle arm is pushed toward the prop or vice versa. Does the trottle open & close the same direstion as the choke or not ?? I cant find my little round mirror on the telliscopic rode to check it mtself. Must have sprouted legs and walked off. Oh and by the way the DL50 is mounted like all the rest upside down.
NEDYOB
This is a dumb question then, went moving the trottle arm, witch way is open and witch way is closed? when throttle arm is pushed toward the prop or vice versa. Does the trottle open & close the same direstion as the choke or not ?? I cant find my little round mirror on the telliscopic rode to check it mtself. Must have sprouted legs and walked off. Oh and by the way the DL50 is mounted like all the rest upside down.
NEDYOB
09-17-2008 | 07:07 PM
#3061
RE: DL-50 engine
Ha, no not a dumb question. To tell you the truith, when I started up my newest DL that's in my Edge I had the throttle reversed so when it started it was WFO. Luckily, I was using one of the retention devices provided at our club so I didn't chop my fingers off. That's a rookie mistake for sure, but hey...
Let me go look at my plane and I'll let you know...
Open is back - toward the rudder and closed is foward - toward the spinner.
Party on.
Let me go look at my plane and I'll let you know...
Open is back - toward the rudder and closed is foward - toward the spinner.
Party on.
09-17-2008 | 07:15 PM
#3062
RE: DL-50 engine
Okay, so I took the day off today to get some flying in to practive for the North Central IMAC Regionals. Hadn't been able to get in enough flying last few weeks.
I brought out my Extra and my Edge - both outfitted with DL 50s. Flew the Edge first - still on break-in fuel. Was running a Menz 22 x 8 @ 7,000rpm. This plane, unlike my Extra, I'm afraid to go much above half-throttle when I'm straight-and-level. Maybe this DL is a bit stronger for some reason, maybe the wing on the Edge is a bit thinner (quite sure it is), fewer "squares" (wing area), whatever. This thing is a little rocket ship!
Anyway, was going to wait until the engine was broken-in before switching to the 3-blade, but I mounted it anyway. Besides, I'm hardly ever using full - throttle, so should be okay.
So compared the RPM with the 3-blade to the 2-blade (my 3-blade is a Mejzlik 20 x 10 by the way). Well, the 3-blade was pulling 10 grand! Oops. No. Forgot to switch to 3-blade setting on my tach!
Okay, 6,800. That's better.
Anyway, the thing still pulls like a whatever and it flies just great. Seems a little "happier" on the 3-blade with less torque effect and slower down lines. And I like the additional 1" ground clearance.
Anyway (guess I said that already), I really like the 3-blade and it seems to work well. Prolly get even more RPM (not that I need it) as the engine continues to break-in and I switch to the 80:1 Amsoil Saber.
I brought out my Extra and my Edge - both outfitted with DL 50s. Flew the Edge first - still on break-in fuel. Was running a Menz 22 x 8 @ 7,000rpm. This plane, unlike my Extra, I'm afraid to go much above half-throttle when I'm straight-and-level. Maybe this DL is a bit stronger for some reason, maybe the wing on the Edge is a bit thinner (quite sure it is), fewer "squares" (wing area), whatever. This thing is a little rocket ship!
Anyway, was going to wait until the engine was broken-in before switching to the 3-blade, but I mounted it anyway. Besides, I'm hardly ever using full - throttle, so should be okay.
So compared the RPM with the 3-blade to the 2-blade (my 3-blade is a Mejzlik 20 x 10 by the way). Well, the 3-blade was pulling 10 grand! Oops. No. Forgot to switch to 3-blade setting on my tach!
Okay, 6,800. That's better.
Anyway, the thing still pulls like a whatever and it flies just great. Seems a little "happier" on the 3-blade with less torque effect and slower down lines. And I like the additional 1" ground clearance.
Anyway (guess I said that already), I really like the 3-blade and it seems to work well. Prolly get even more RPM (not that I need it) as the engine continues to break-in and I switch to the 80:1 Amsoil Saber.
09-17-2008 | 07:25 PM
#3063
Senior Member
My Feedback: (67)
Joined: Feb 2002
Posts: 1,381
Likes: 0
Received 0 Likes
on
0 Posts
From: NORTHWOOD,
IA
RE: DL-50 engine
Thanks KRPROTON,
That clears it up, also I didnt want to make the same mistake and have the trottle reversed. Going out right now and setting the throttle up in my new 10C
Thanks again.
NEDYOB
That clears it up, also I didnt want to make the same mistake and have the trottle reversed. Going out right now and setting the throttle up in my new 10C
Thanks again.
NEDYOB
09-17-2008 | 07:36 PM
#3065
Senior Member
My Feedback: (67)
Joined: Feb 2002
Posts: 1,381
Likes: 0
Received 0 Likes
on
0 Posts
From: NORTHWOOD,
IA
RE: DL-50 engine
I know this is not the right thread for the 10C but it Rocks, may not be as soffistcated as the 9Z but is alot like the 9C in set up. Good thing is all the planes in my Campac memory on my 9C down loaded perfectly.
Anyway, back to my DL50 so I dont get busted, did I ever say in previous thread that "I Love My DL50" LOL that should save me.
NEDYOB
Anyway, back to my DL50 so I dont get busted, did I ever say in previous thread that "I Love My DL50" LOL that should save me.
NEDYOB
09-17-2008 | 09:22 PM
#3067
My Feedback: (69)
Joined: Jul 2002
Posts: 3,779
Likes: 0
Received 0 Likes
on
0 Posts
From: Fort Smith,
AR
RE: DL-50 engine
Have any of you guys run the TBM silent beauty pitts muffler on your DL compared to the stock side muffler? I am going to run it on mine since the side muffler will not fit in the cowl of my current project, and curious what kind of performance loss you are seeing comparing the 2.
09-17-2008 | 09:58 PM
#3068
My Feedback: (2)
RE: DL-50 engine
ORIGINAL: krproton
I gotta get me one of them 10C's. Still using a 9Z (with 2.4GHz module at least!).
I gotta get me one of them 10C's. Still using a 9Z (with 2.4GHz module at least!).
09-17-2008 | 10:05 PM
#3069
Joined: Jun 2007
Posts: 60
Likes: 0
Received 0 Likes
on
0 Posts
From: Frankfort,
IL
RE: DL-50 engine
Got the new DL50 started tonight. Easy to start 5-10 flips of the prop. Ran too fast. No matter how low I took the throttle she stayed at half power. Adjusted the low end needle twice then gave up and put her back on the bench. Much head scratching. Checked the servos and could not get the throttle to close more. Tried againstill running way too fast. More bench time and eurika I found the newbie mistake. I had not removed the low end idle adjust so that the throttle was being held open. Removed the adjust screw and the throttle closed another 10% 
What other mistakes can I make tomorrow?
What other mistakes can I make tomorrow?
09-17-2008 | 10:44 PM
#3070
Senior Member
My Feedback: (2)
Joined: Jul 2008
Posts: 369
Likes: 0
Received 0 Likes
on
0 Posts
From: Miami beach, FL
RE: DL-50 engine
ORIGINAL: kruzin55
Got the new DL50 started tonight. Easy to start 5-10 flips of the prop. Ran too fast. No matter how low I took the throttle she stayed at half power. Adjusted the low end needle twice then gave up and put her back on the bench. Much head scratching. Checked the servos and could not get the throttle to close more. Tried againstill running way too fast. More bench time and eurika I found the newbie mistake. I had not removed the low end idle adjust so that the throttle was being held open. Removed the adjust screw and the throttle closed another 10% What other mistakes can I make tomorrow?
Got the new DL50 started tonight. Easy to start 5-10 flips of the prop. Ran too fast. No matter how low I took the throttle she stayed at half power. Adjusted the low end needle twice then gave up and put her back on the bench. Much head scratching. Checked the servos and could not get the throttle to close more. Tried againstill running way too fast. More bench time and eurika I found the newbie mistake. I had not removed the low end idle adjust so that the throttle was being held open. Removed the adjust screw and the throttle closed another 10%
What other mistakes can I make tomorrow?
You obviously ordered the engine from oversees. American models coming from dlusa.net don't have the adjust. You can better take it out entirely and don't forget to clip the top of the spring so the arm can move freely, but don't remove the spring entirely.
09-18-2008 | 06:10 AM
#3071
Senior Member
Joined: Nov 2004
Posts: 283
Likes: 0
Received 0 Likes
on
0 Posts
From: Oxfordshire, UNITED KINGDOM
RE: DL-50 engine
ORIGINAL: mstam1971
Do you have tach readings of your engines? I believe that most of us like to squeeze every ounce of torque from our engines and if you read several posts back you'll find someone having problems with his DL100 because of breaking it in with 30:1 synthetic.
For me a 20oz tank is good for 15 minutes 3D flight with a quarter tank left. I set my timer to 12 minutes to be on the safe side.
Everyone has its own philosophy re breaking engines in, however using a mineral oil for the first gallons helps discharging metal debris. This results in a better compression and better compression equals more power.
ORIGINAL: wavy777
Guys, I'm no engine expert, but i do have 3 DL's. The oldest is a version 1 engine with at least 12 - 15 gallons on it now, the others probably have about 4 - 5 gallons each through them. I just wanted to share my experiences on break in and oil.
I simply ran all motors on 50:1 synthetic from day 1, and are on the same mix now and have proved super super reliable, powerful, tractable and a joy to own
As for break in...just make sure the motor ticks over reliably and then go fly the thing...just be aware of fuel consumption when new. I got 8 minutes max on a 26 ox tank when the motor was new, now 26 oz is good for 14 minutes with some left in reserve.
Just my 2c...
Guys, I'm no engine expert, but i do have 3 DL's. The oldest is a version 1 engine with at least 12 - 15 gallons on it now, the others probably have about 4 - 5 gallons each through them. I just wanted to share my experiences on break in and oil.
I simply ran all motors on 50:1 synthetic from day 1, and are on the same mix now and have proved super super reliable, powerful, tractable and a joy to own
As for break in...just make sure the motor ticks over reliably and then go fly the thing...just be aware of fuel consumption when new. I got 8 minutes max on a 26 ox tank when the motor was new, now 26 oz is good for 14 minutes with some left in reserve.
Just my 2c...
For me a 20oz tank is good for 15 minutes 3D flight with a quarter tank left. I set my timer to 12 minutes to be on the safe side.
Everyone has its own philosophy re breaking engines in, however using a mineral oil for the first gallons helps discharging metal debris. This results in a better compression and better compression equals more power.
Motor 1 KS Pipe, Mejzlik 23 x 8 7150 rpm
Motor 2 KS Pipe, Mejzlik 23 x 8 6950 rpm
Motor 3 ES Pipe, Mejzlik 23 x 8 7400 rpm
Cheers
W
09-23-2008 | 08:23 AM
#3072
My Feedback: (2)
RE: DL-50 engine
DL 50 thread at the bottom of page two??? That can't be right. I guess everyone is out flying.
Anyway the weather sucks up here and I managed to find some Loctite 620 downtown yesterday so I guess I'll put my engine back together today. I'll have lot's of pics to follow thanks to Tim (krproton) and Scott (dlenginesaustralia). I just need to make something to bolt my hub to when I tighten the propeller shaft to the crank.
Anyway the weather sucks up here and I managed to find some Loctite 620 downtown yesterday so I guess I'll put my engine back together today. I'll have lot's of pics to follow thanks to Tim (krproton) and Scott (dlenginesaustralia). I just need to make something to bolt my hub to when I tighten the propeller shaft to the crank.
09-24-2008 | 09:53 AM
#3073
My Feedback: (2)
RE: DL-50 engine
I forgot to mention on the previous page that DL has changed carbs again. They used to come with a WT723 or a WT739 which have an 11.1mm venturi. My newest DL came with an WT809 carb which has a 13.5mm venturi. I wonder if it gives anymore rpm on the top end.
Edit: I looked at my first two DL's with the 723 and 739 carbs. They are in fact 13.5mm carbs and are stamped with a 34 inside the venturi. For those that are not aware the number inside the venturi is the size in 64ths of an inch. For some reason the Walbro site lists them as 11.11mm carbs. So in the end all the carbs including my new DL with the 809 are the same size.
Edit: I looked at my first two DL's with the 723 and 739 carbs. They are in fact 13.5mm carbs and are stamped with a 34 inside the venturi. For those that are not aware the number inside the venturi is the size in 64ths of an inch. For some reason the Walbro site lists them as 11.11mm carbs. So in the end all the carbs including my new DL with the 809 are the same size.
09-24-2008 | 09:56 AM
#3074
Senior Member
My Feedback: (2)
Joined: Jul 2008
Posts: 369
Likes: 0
Received 0 Likes
on
0 Posts
From: Miami beach, FL
RE: DL-50 engine
ORIGINAL: Super08
I forgot to mention on the previous page that DL has changed carbs again. They used to come with a WT723 or a WT739 which have an 11.1mm venturi. My newest DL came with an WT805 carb which has a 13.5mm venturi. I wonder if it gives anymore rpm on the top end.
I forgot to mention on the previous page that DL has changed carbs again. They used to come with a WT723 or a WT739 which have an 11.1mm venturi. My newest DL came with an WT805 carb which has a 13.5mm venturi. I wonder if it gives anymore rpm on the top end.
