DL-50 engine
05-07-2009, 11:33 AM
#4751
RE: DL-50 engine
I hate those pull-pull springy things, they're not positive enough in windy conditions. I use one like this; http://www.troybuiltmodels.com/items/TBMTW33CF.html
05-07-2009, 11:57 AM
#4752
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RE: DL-50 engine
Thanks I like that better too because it'll be a drop-in replacement for my EF Extra. Early versions of this plane had a similar tail wheel of very poor quality.
05-07-2009, 12:14 PM
#4753
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RE: DL-50 engine
ORIGINAL: JoeAirPort
That was not the case with me. It clearly sputtered in knife edge only one direction. Also it seemed lean inverted. This totally too that problem away. No doubt about it.
Joe
That was not the case with me. It clearly sputtered in knife edge only one direction. Also it seemed lean inverted. This totally too that problem away. No doubt about it.
Joe
Since I am from Bulgaria it will be a bit harder to get the velocity stack. In all cases i think it really improves the engine's work and gives some more power. So from where d oyou have yours? I have a friend in USA and maybe I can ship it to his address and he will bring it to me.
Would appreciate your help!
Best regards!
05-07-2009, 01:12 PM
#4754
RE: DL-50 engine
ORIGINAL: Pilot013
Hey Joe!
Since I am from Bulgaria it will be a bit harder to get the velocity stack. In all cases i think it really improves the engine's work and gives some more power. So from where d oyou have yours? I have a friend in USA and maybe I can ship it to his address and he will bring it to me.
Would appreciate your help!
Best regards!
ORIGINAL: JoeAirPort
That was not the case with me. It clearly sputtered in knife edge only one direction. Also it seemed lean inverted. This totally too that problem away. No doubt about it.
Joe
That was not the case with me. It clearly sputtered in knife edge only one direction. Also it seemed lean inverted. This totally too that problem away. No doubt about it.
Joe
Since I am from Bulgaria it will be a bit harder to get the velocity stack. In all cases i think it really improves the engine's work and gives some more power. So from where d oyou have yours? I have a friend in USA and maybe I can ship it to his address and he will bring it to me.
Would appreciate your help!
Best regards!
They are very inexpensive. Less than $5 US.
Mine's running so good that for less than $5 they go on all of mine from now on.
http://en.wikipedia.org/wiki/Velocity_stack
05-07-2009, 01:49 PM
#4755
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RE: DL-50 engine
Before you do that try soldering a 1/8" id brass tube to a section of flat brass plate. Drill a hole in the brass plate that permits attachment to the face of the carb plate, orienting the end of the brass tube into and at the edge of the carb opening. Don't restrict the choke plate with the brass tube. The other end of the brass tube is connected via a section of fuel tubing to the opening in the diaphragm plate. No shipping costs and no parts costs for things you likely have laying around the shop now. The problem has nothing to do with the carb inlet design itself.
05-07-2009, 02:04 PM
#4756
RE: DL-50 engine
ORIGINAL: Tired Old Man
Before you do that try soldering a 1/8" id brass tube to a section of flat brass plate. Drill a hole in the brass plate that permits attachment to the face of the carb plate, orienting the end of the brass tube into and at the edge of the carb opening. Don't restrict the choke plate with the brass tube. The other end of the brass tube is connected via a section of fuel tubing to the opening in the diaphragm plate. No shipping costs and no parts costs for things you likely have laying around the shop now. The problem has nothing to do with the carb inlet design itself.
Before you do that try soldering a 1/8" id brass tube to a section of flat brass plate. Drill a hole in the brass plate that permits attachment to the face of the carb plate, orienting the end of the brass tube into and at the edge of the carb opening. Don't restrict the choke plate with the brass tube. The other end of the brass tube is connected via a section of fuel tubing to the opening in the diaphragm plate. No shipping costs and no parts costs for things you likely have laying around the shop now. The problem has nothing to do with the carb inlet design itself.
05-07-2009, 02:58 PM
#4757
RE: DL-50 engine
Not to be argumentative but I worked with Joe on his running quality issue pretty much from the beginning. Each change was made individually by itself to see the results of that change. Improvement was noted, but the last issue to clear up was a mixture change in only 1 or 2 flight attitudes. I had had the exact same experience before on a 50cc plane with a rear carb and as a last resort I put the v-stack on to get the intake air from a less turbulent source inside the engine box, it worked. Joe wanted to try it, appearantly his results were similar to mine. Velocity stacks are not a cure all and seldom do much of anything if the things are running well to start with but there are applications that can create conditions where a velocity stack can have a beneficial effect.
BTW, pretty much all of the 3W singles with rear carbs look like these.
BTW, pretty much all of the 3W singles with rear carbs look like these.
05-07-2009, 04:43 PM
#4758
Senior Member
My Feedback: (1)
RE: DL-50 engine
Not all, even excluding the few side carbed versions.
Their bottom carb mounted twins use a "snorkle" with a diaphragm tube to minimize the same issue that you and Joe have been dealing with.
Nothing wrong at all with trying a velocity stack but for some a stack may generate space or access issues. Just something to try before going to a stack. I'm sure I'll remember something that I'll want to add in this but it'll be another post when it happens....
Their bottom carb mounted twins use a "snorkle" with a diaphragm tube to minimize the same issue that you and Joe have been dealing with. Nothing wrong at all with trying a velocity stack but for some a stack may generate space or access issues. Just something to try before going to a stack. I'm sure I'll remember something that I'll want to add in this but it'll be another post when it happens....
05-07-2009, 04:47 PM
#4759
Senior Member
My Feedback: (1)
RE: DL-50 engine
Hey Jody,
There's a big difference between arguementative and discussion. I for sure don't see anyplace where what you and I exchange could ever be considered arguementative. See, I had to do a second post to add to the one above. Peachy.
There's a big difference between arguementative and discussion. I for sure don't see anyplace where what you and I exchange could ever be considered arguementative. See, I had to do a second post to add to the one above. Peachy.
05-07-2009, 06:26 PM
#4762
RE: DL-50 engine
Since I've been in this hobby (about 6 years) the engines have always been the problem for me. The air frames, servo, batteries, switches are usually bullet proof. But the engines always give me some flack. Really I just want to fly. I put up with all the assembly to get out there and have fun. I learn a lot putting these things together but really I prefer to just charge, gas up and fly. That's what I'm hoping the rest of my flying season will be like once I get this latest DLE-55 in my Extra. The DL-50 in my Yak is totally dialed in. 
05-07-2009, 06:36 PM
#4763
RE: DL-50 engine
TOM,
You have mentioned using thermocouples and some sort of onboard telemetry device to record temperature during flight. I've been looking for such a gizmo and have not had any luck. I was wondering if you could help point me in the right direction, thanks.
You have mentioned using thermocouples and some sort of onboard telemetry device to record temperature during flight. I've been looking for such a gizmo and have not had any luck. I was wondering if you could help point me in the right direction, thanks.
05-08-2009, 12:46 AM
#4769
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RE: DL-50 engine
Ladys & Gentlemen
Does your DL50 lack some RPM?
Would you like to have it run cooler?
Would you like to make this great little enging last longer?
If your answer is Yes, the try this fuel additive at 1% of fuel volume. Go to: [link]http://[email protected][/link] Watch the Videos and you can buy it at Wholesale!
Does your DL50 lack some RPM?
Would you like to have it run cooler?
Would you like to make this great little enging last longer?
If your answer is Yes, the try this fuel additive at 1% of fuel volume. Go to: [link]http://[email protected][/link] Watch the Videos and you can buy it at Wholesale!
05-08-2009, 07:54 AM
#4773
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RE: DL-50 engine
ORIGINAL: jedijody
TOM,
You have mentioned using thermocouples and some sort of onboard telemetry device to record temperature during flight. I've been looking for such a gizmo and have not had any luck. I was wondering if you could help point me in the right direction, thanks.
TOM,
You have mentioned using thermocouples and some sort of onboard telemetry device to record temperature during flight. I've been looking for such a gizmo and have not had any luck. I was wondering if you could help point me in the right direction, thanks.
Im using the eagle tree v3 Logger, and couple of temp loop sensors, alt, rpm on the DL-100 install in my airframe, works a treat. Didnt got the full telemetry/wireless system, just the small elogger..logger etc, and didnt work out too expensive. You can buy locally easy enough, mine I bought through hobby city, $50 for the logger and about $10 each sensor. Had some pics of the install, somewhere, will try and find them and post them up.
Gives some good info, amazing how much a prop unloads in the air, and intersting see each cylinder temp changes etc. You can muck around with baffles etc, and see real results, rather than percieved. Well worth the $ in my opinion...
Guys a EagleTree give good backup support too
Cheers
Scott.
05-08-2009, 12:51 PM
#4774
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RE: DL-50 engine
Hi Joe
I removed the tail wheel assembly and checked its Wt its 50 g, havnt replaced it though. Managed to get rid of 160 g nose Wt by moving the Rx batteries forward on the side of the engine box. I will put on the 22 x 8 JXF and give it a try this Sunday. Our field is located at 600 ft ASL but the ambient temperatures are very high around 110 F, I am hesitating to lean the engine fully it will probably overheat or should I lean it to peak RPM ?
Thanks for all your input guys.
Take care,
Junaid
I removed the tail wheel assembly and checked its Wt its 50 g, havnt replaced it though. Managed to get rid of 160 g nose Wt by moving the Rx batteries forward on the side of the engine box. I will put on the 22 x 8 JXF and give it a try this Sunday. Our field is located at 600 ft ASL but the ambient temperatures are very high around 110 F, I am hesitating to lean the engine fully it will probably overheat or should I lean it to peak RPM ?
Thanks for all your input guys.
Take care,
Junaid
05-08-2009, 12:59 PM
#4775
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RE: DL-50 engine
You could save another 2-3oz by replacing that servo operated switch, with a fiberoptic alternative, if you must have a second way of killing the engine aside from dropping the trim on your throttle.