DL-50 engine
08-26-2008 | 12:27 AM
#2701
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From: NORTHWOOD,
IA
RE: DL-50 engine
Are you running Amsoil saber or the other kind. Yup gotta watch out for those trees there like deere they jump out at you drom everywhere.
What muffler did you go with the stock one or a pitts muffler.
NEDYOB
What muffler did you go with the stock one or a pitts muffler.
NEDYOB
08-26-2008 | 11:33 AM
#2703
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RE: DL-50 engine
ORIGINAL: krproton
So I've been very pleased with the way my DL 50 has been running. Broke it in on the Lawnboy (two gallons), then went to Amsoil 50:1. Broke it in on a Zinger Pro wood 20 x 8, then switched to a Mejzlik 20 x 8 somewhere down the line. Then, damaged the tips on the Mej, switched to a Xoar 20 x 8. Taking RPM readings I was a little disappointed that I was turning only about 6600rpm when many others are bragging of 7000 - 72000 on similar prop. Okay, then I learn you gotta run that Amsoil at at least 80:1. So, I switched to 80:1. Engine ran great, maybe a little cooler, but didn't seem to pick up much RPM. Then switched to a new plug (CM - 6 or whatever), no improvement (but the original plug was carboned up pretty bad - probably the rich fuel/oil ratio). Then a friend loaned me another Mejzlik 20 x 8 and I picked up about 400rpm! Next flight I lean the low needle a bit and the engine's running even stronger, but still a little rich, so I lean the top end a tad the next flight. Look out!!! This thing is running stronger than ever! Maybe the combination of all those factors, along with more time on the engine (10 - 15 gallons now?) added up to the RPM increase. The engine runs so strong now that I'm starting to think a little more about what I'm doing so as to not overstress the airframe. Doesn't matter though because the moment my engine started really comin' on I destroy the plane when I momentarily loose concentration and clip a tree with one of the wings (hey, I was doing an outside knife edge circle!). Of course, buddy's prop destroyed too.
Oh well, engine seems fine (spark plug cap split apart and won't stay together so I need a new ignition - on the way from ValleyView) and already have another Extra in progress.
Can't wait to get that engine and plane back into the air. It was running really strong!
Moral of the story; 80:1, Mejzlik prop.
So I've been very pleased with the way my DL 50 has been running. Broke it in on the Lawnboy (two gallons), then went to Amsoil 50:1. Broke it in on a Zinger Pro wood 20 x 8, then switched to a Mejzlik 20 x 8 somewhere down the line. Then, damaged the tips on the Mej, switched to a Xoar 20 x 8. Taking RPM readings I was a little disappointed that I was turning only about 6600rpm when many others are bragging of 7000 - 72000 on similar prop. Okay, then I learn you gotta run that Amsoil at at least 80:1. So, I switched to 80:1. Engine ran great, maybe a little cooler, but didn't seem to pick up much RPM. Then switched to a new plug (CM - 6 or whatever), no improvement (but the original plug was carboned up pretty bad - probably the rich fuel/oil ratio). Then a friend loaned me another Mejzlik 20 x 8 and I picked up about 400rpm! Next flight I lean the low needle a bit and the engine's running even stronger, but still a little rich, so I lean the top end a tad the next flight. Look out!!! This thing is running stronger than ever! Maybe the combination of all those factors, along with more time on the engine (10 - 15 gallons now?) added up to the RPM increase. The engine runs so strong now that I'm starting to think a little more about what I'm doing so as to not overstress the airframe. Doesn't matter though because the moment my engine started really comin' on I destroy the plane when I momentarily loose concentration and clip a tree with one of the wings (hey, I was doing an outside knife edge circle!). Of course, buddy's prop destroyed too.
Oh well, engine seems fine (spark plug cap split apart and won't stay together so I need a new ignition - on the way from ValleyView) and already have another Extra in progress.
Can't wait to get that engine and plane back into the air. It was running really strong!
Moral of the story; 80:1, Mejzlik prop.
@4 gallons thru mine. 2 gallons Lawnboy @ 32:1. 2 Gallons Amsoil Saber @ 80:1. All is fine. Swinging a Mejzilk 22X10 with a MTW75K can at an even 7,000 RPM. No burbles and transition is perfect. Changed plug to CM-6 when I switched to the Amsoil mix.
I couldn't be happier!
Dave Rigotti
08-26-2008 | 08:44 PM
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From: Rogers,
AR
RE: DL-50 engine
ORIGINAL: krproton
So I've been very pleased with the way my DL 50 has been running. Broke it in on the Lawnboy (two gallons), then went to Amsoil 50:1. Broke it in on a Zinger Pro wood 20 x 8, then switched to a Mejzlik 20 x 8 somewhere down the line. Then, damaged the tips on the Mej, switched to a Xoar 20 x 8. Taking RPM readings I was a little disappointed that I was turning only about 6600rpm when many others are bragging of 7000 - 72000 on similar prop. Okay, then I learn you gotta run that Amsoil at at least 80:1. So, I switched to 80:1. Engine ran great, maybe a little cooler, but didn't seem to pick up much RPM. Then switched to a new plug (CM - 6 or whatever), no improvement (but the original plug was carboned up pretty bad - probably the rich fuel/oil ratio). Then a friend loaned me another Mejzlik 20 x 8 and I picked up about 400rpm! Next flight I lean the low needle a bit and the engine's running even stronger, but still a little rich, so I lean the top end a tad the next flight. Look out!!! This thing is running stronger than ever! Maybe the combination of all those factors, along with more time on the engine (10 - 15 gallons now?) added up to the RPM increase. The engine runs so strong now that I'm starting to think a little more about what I'm doing so as to not overstress the airframe. Doesn't matter though because the moment my engine started really comin' on I destroy the plane when I momentarily loose concentration and clip a tree with one of the wings (hey, I was doing an outside knife edge circle!). Of course, buddy's prop destroyed too.
Oh well, engine seems fine (spark plug cap split apart and won't stay together so I need a new ignition - on the way from ValleyView) and already have another Extra in progress.
Can't wait to get that engine and plane back into the air. It was running really strong!
Moral of the story; 80:1, Mejzlik prop.
So I've been very pleased with the way my DL 50 has been running. Broke it in on the Lawnboy (two gallons), then went to Amsoil 50:1. Broke it in on a Zinger Pro wood 20 x 8, then switched to a Mejzlik 20 x 8 somewhere down the line. Then, damaged the tips on the Mej, switched to a Xoar 20 x 8. Taking RPM readings I was a little disappointed that I was turning only about 6600rpm when many others are bragging of 7000 - 72000 on similar prop. Okay, then I learn you gotta run that Amsoil at at least 80:1. So, I switched to 80:1. Engine ran great, maybe a little cooler, but didn't seem to pick up much RPM. Then switched to a new plug (CM - 6 or whatever), no improvement (but the original plug was carboned up pretty bad - probably the rich fuel/oil ratio). Then a friend loaned me another Mejzlik 20 x 8 and I picked up about 400rpm! Next flight I lean the low needle a bit and the engine's running even stronger, but still a little rich, so I lean the top end a tad the next flight. Look out!!! This thing is running stronger than ever! Maybe the combination of all those factors, along with more time on the engine (10 - 15 gallons now?) added up to the RPM increase. The engine runs so strong now that I'm starting to think a little more about what I'm doing so as to not overstress the airframe. Doesn't matter though because the moment my engine started really comin' on I destroy the plane when I momentarily loose concentration and clip a tree with one of the wings (hey, I was doing an outside knife edge circle!). Of course, buddy's prop destroyed too.
Oh well, engine seems fine (spark plug cap split apart and won't stay together so I need a new ignition - on the way from ValleyView) and already have another Extra in progress.
Can't wait to get that engine and plane back into the air. It was running really strong!
Moral of the story; 80:1, Mejzlik prop.
08-26-2008 | 09:05 PM
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From: El Reno, OK
RE: DL-50 engine
I would believe him; my DL 50 is doing the PT 22 x 8 at 7680.... couldn't believe the tach myself, but it also just proves that the PT is a "spinner" and not a "puller"....
08-26-2008 | 09:10 PM
#2708
RE: DL-50 engine
Thanks for the explanation. My engine is on it's second gallon of breakin fuel and it is turning a Xoar22/8 (same as a JXF?) at 6850-6900 so I guess I am in the ballpark.
08-26-2008 | 10:19 PM
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From: Goodyear, AZ
RE: DL-50 engine
If anyone needs a DL50 stock muffler, PM me. $5.00 for shipping, muffler is free. It probably has around 10 minutes of run time on the ground to get the throttle servo set up while I waited for a Pitts wrap around muffler to arrive.
Chuck
Chuck
08-26-2008 | 11:53 PM
#2711
RE: DL-50 engine
ORIGINAL: Stick Bender
I hope you are confusing a 20x8 with a 22x8, I'm pretty sure the rod would come out the side of mine if I held it wide open with a 20x8 on it (unless maybe it was a TBM) Mine was turning a pt 22x8 7800, turns a TBM 23x8 6200, TBM 22x8 6650, JXF 22x8 6900 at about 1000 feet altitude.
ORIGINAL: krproton
So I've been very pleased with the way my DL 50 has been running. Broke it in on the Lawnboy (two gallons), then went to Amsoil 50:1. Broke it in on a Zinger Pro wood 20 x 8, then switched to a Mejzlik 20 x 8 somewhere down the line. Then, damaged the tips on the Mej, switched to a Xoar 20 x 8. Taking RPM readings I was a little disappointed that I was turning only about 6600rpm when many others are bragging of 7000 - 72000 on similar prop. Okay, then I learn you gotta run that Amsoil at at least 80:1. So, I switched to 80:1. Engine ran great, maybe a little cooler, but didn't seem to pick up much RPM. Then switched to a new plug (CM - 6 or whatever), no improvement (but the original plug was carboned up pretty bad - probably the rich fuel/oil ratio). Then a friend loaned me another Mejzlik 20 x 8 and I picked up about 400rpm! Next flight I lean the low needle a bit and the engine's running even stronger, but still a little rich, so I lean the top end a tad the next flight. Look out!!! This thing is running stronger than ever! Maybe the combination of all those factors, along with more time on the engine (10 - 15 gallons now?) added up to the RPM increase. The engine runs so strong now that I'm starting to think a little more about what I'm doing so as to not overstress the airframe. Doesn't matter though because the moment my engine started really comin' on I destroy the plane when I momentarily loose concentration and clip a tree with one of the wings (hey, I was doing an outside knife edge circle!). Of course, buddy's prop destroyed too.
Oh well, engine seems fine (spark plug cap split apart and won't stay together so I need a new ignition - on the way from ValleyView) and already have another Extra in progress.
Can't wait to get that engine and plane back into the air. It was running really strong!
Moral of the story; 80:1, Mejzlik prop.
So I've been very pleased with the way my DL 50 has been running. Broke it in on the Lawnboy (two gallons), then went to Amsoil 50:1. Broke it in on a Zinger Pro wood 20 x 8, then switched to a Mejzlik 20 x 8 somewhere down the line. Then, damaged the tips on the Mej, switched to a Xoar 20 x 8. Taking RPM readings I was a little disappointed that I was turning only about 6600rpm when many others are bragging of 7000 - 72000 on similar prop. Okay, then I learn you gotta run that Amsoil at at least 80:1. So, I switched to 80:1. Engine ran great, maybe a little cooler, but didn't seem to pick up much RPM. Then switched to a new plug (CM - 6 or whatever), no improvement (but the original plug was carboned up pretty bad - probably the rich fuel/oil ratio). Then a friend loaned me another Mejzlik 20 x 8 and I picked up about 400rpm! Next flight I lean the low needle a bit and the engine's running even stronger, but still a little rich, so I lean the top end a tad the next flight. Look out!!! This thing is running stronger than ever! Maybe the combination of all those factors, along with more time on the engine (10 - 15 gallons now?) added up to the RPM increase. The engine runs so strong now that I'm starting to think a little more about what I'm doing so as to not overstress the airframe. Doesn't matter though because the moment my engine started really comin' on I destroy the plane when I momentarily loose concentration and clip a tree with one of the wings (hey, I was doing an outside knife edge circle!). Of course, buddy's prop destroyed too.
Oh well, engine seems fine (spark plug cap split apart and won't stay together so I need a new ignition - on the way from ValleyView) and already have another Extra in progress.
Can't wait to get that engine and plane back into the air. It was running really strong!
Moral of the story; 80:1, Mejzlik prop.
Thanks.
Whew! And I just about pooped my pants! I just ordered two more Mejzlik props (one to replace the one my buddy loaned me when I demolished my plane and another for my self!) and was hoping I didn't make the same mistake on my order as I did in my post!
Nope. Checked the invoice. Got it right. Two Mejzlik 22 x 8's on the way.
08-27-2008 | 12:01 AM
#2712
RE: DL-50 engine
And all this talk about 7200, 7440, 7800 RPM. If my engine starts turning that I'm going to have to start being REAL careful. Otherwise, I'll probably tear up the airframe without even hitting the ground! [sm=50_50.gif]
08-27-2008 | 01:23 AM
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From: R�pcelak,Mansfield ,
TX, HUNGARY
RE: DL-50 engine
Fine,my Dl50 is turning 7150rpms with a Metts 22x8 wood prop drinking still1:40 mixture.Maybe its time to lean the needles further.
still1:40 mixture.Maybe its time to lean the needles further.
08-27-2008 | 08:05 AM
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From: Goodyear, AZ
RE: DL-50 engine
ORIGINAL: chuck l
If anyone needs a DL50 stock muffler, PM me. $5.00 for shipping, muffler is free. It probably has around 10 minutes of run time on the ground to get the throttle servo set up while I waited for a Pitts wrap around muffler to arrive.
Chuck
If anyone needs a DL50 stock muffler, PM me. $5.00 for shipping, muffler is free. It probably has around 10 minutes of run time on the ground to get the throttle servo set up while I waited for a Pitts wrap around muffler to arrive.
Chuck
08-27-2008 | 02:03 PM
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From: Apo,
AP
RE: DL-50 engine
Just got back from the field, I decided to change the diet for my DL to Amsoil 100:1 . Engine actually picked up about 300 rpm it's running about 7190 now but I think it is a bit lean.
Are you guys richening your engines after you change from mineral to synthetic? I really like this engine she runs sweet but seemed a bit hot today.
Jeff
Are you guys richening your engines after you change from mineral to synthetic? I really like this engine she runs sweet but seemed a bit hot today.
Jeff
08-27-2008 | 02:25 PM
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From: R�pcelak,Mansfield ,
TX, HUNGARY
RE: DL-50 engine
This afternoon I decided to finish the break-in process,so we went to the field for towing my buddy"s huge Salto
glider,spanning 4,5m.Well,my CARF Extra 330L armed with the Dl50 engine turned to be a real stallion.It was able to tow the big glider in a 45 degree path.
So far so good.I"m really satisfied with this engine,and hope it will be in good health for long time.
glider,spanning 4,5m.Well,my CARF Extra 330L armed with the Dl50 engine turned to be a real stallion.It was able to tow the big glider in a 45 degree path.
So far so good.I"m really satisfied with this engine,and hope it will be in good health for long time.
08-27-2008 | 03:40 PM
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From: Newville,
PA
RE: DL-50 engine
I have never been around gliders and was wondering how the tow cable works. How does it release and how is it attached? It looks like it may be part of it tied onto your extra.
08-28-2008 | 10:03 AM
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From: Mississauga,
ON, CANADA
RE: DL-50 engine
Question on midrange burbling ??
When I first started the DL50 it was burbling a lot, and also had a lot of misfires, could not tune them out, so I did the adjustment of the metering leaver and got most of the burbling and misfires out. Depending on the weather it still burbled a little on some days. The metering adjustment was done with a 23x8 Xoar Sword.
Last week I had a bad landing and spread the gear on my Pitts and had a prop strike and cracked the Xoar 23x8 prop. So I reverted back to my break in prop a Xoar 22x8 Sword, to my surprise the engine is burbling again in the mid range, although not as bad as it stared out.
I have attempted to tune the needles on several occasions, but cannot get the burbling out with the 22x8, you can hear it burbling, gurgling and farting in this short clip of my Pitts in knife-edge at a 1/4 to 1/3 throttle with the 22x8 Xoar.
http://www.youtube.com/watch?v=QLWrG0ZPCjo
The power is great and it has never flamed out, but it would be nice to have my cake and eat too.
Does anyone have any thoughts, as to why it burbles with a 22x8 and not as much with a 23x8 ??
Thanks
Geppino
When I first started the DL50 it was burbling a lot, and also had a lot of misfires, could not tune them out, so I did the adjustment of the metering leaver and got most of the burbling and misfires out. Depending on the weather it still burbled a little on some days. The metering adjustment was done with a 23x8 Xoar Sword.
Last week I had a bad landing and spread the gear on my Pitts and had a prop strike and cracked the Xoar 23x8 prop. So I reverted back to my break in prop a Xoar 22x8 Sword, to my surprise the engine is burbling again in the mid range, although not as bad as it stared out.
I have attempted to tune the needles on several occasions, but cannot get the burbling out with the 22x8, you can hear it burbling, gurgling and farting in this short clip of my Pitts in knife-edge at a 1/4 to 1/3 throttle with the 22x8 Xoar.
http://www.youtube.com/watch?v=QLWrG0ZPCjo
The power is great and it has never flamed out, but it would be nice to have my cake and eat too.
Does anyone have any thoughts, as to why it burbles with a 22x8 and not as much with a 23x8 ??
Thanks
Geppino
08-28-2008 | 11:13 AM
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From: , PORTUGAL
RE: DL-50 engine
I'm about to switch to syntetic oil, at same time I want to change the spark plug (still running the original plug).
thinking about CM6 but would like to try iridium plug, anyone running iridium plug on DL50?
anyone can provide part number of iridium replacement for CM6?
thinking about CM6 but would like to try iridium plug, anyone running iridium plug on DL50?
anyone can provide part number of iridium replacement for CM6?
08-28-2008 | 11:18 AM
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From: Caledon,
ON, CANADA
RE: DL-50 engine
Xoar 23x8 prop. So I revered back to my break in prop a Xoar 22x8 Sword looks like less load which will cause rich condition and burbling, mine runs best when its slightly hard to start, re leaner, I find generally if it starts easy it burbles
08-28-2008 | 12:58 PM
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From: El Reno, OK
RE: DL-50 engine
Bigger prop=greater heat/load. For a given condition, excess heat probably creating leaner condition. Lower load=lower CHT, so richer overall. Just guessing, don't have the science to back that up.
Probably need to set your metering lever slightly leaner overall.
Probably need to set your metering lever slightly leaner overall.
08-28-2008 | 02:11 PM
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From: Mississauga,
ON, CANADA
RE: DL-50 engine
Hi Bob,
Thanks for the explanation. I thought of tweaking the metering leaver again for the 22x8.
The Pitts has been a real problem and I did about a dozen adjustments to the engine thrust angles and a half dozen adjustments to the wing incidence, to get it to fly strait and level. It has been a real pain in the butt to tweak this plane.
It's still not 100%, but I'm tired of making adjustments to both the Pitts and the DL. Another 23x8 Xoar is on order. For now I just want to fly and enjoy it. This is a long weekend up here in the great white north and I'm going to put the DL and the Pitts through its paces. You never know, there may be a crash video on Tuesday.
By the way >> I'm measuring 195 degrees F on the front of the engine and 205 F on the back, after a ten minute flight, are these normal temperature for the DL50 ??
Geppino
08-28-2008 | 07:46 PM
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From: Miami beach, FL
RE: DL-50 engine
After one gallon, 7750 on a Vess 22A, 7150 Vess 23B on an MTW RE2 pipe, 89 octane 1:32 Lawnboy gas. Almost through the 3 gallons break-in fuel so I'll bolt the 23B on, tune and post some results here. Gonna use Amsoil Saber 1:80, maybe 1:100 after a couple of gallons.
