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DLE-30 Dies When Inverted

I'm having trouble with my DLE 30 and 35 but believe the issue is with the way I have them tuned. Both run great, fine idle good mid-range with just a bit of burble. I can run them inverted IF I keep the throttle at 3/4 or higher. I run into problems when I try lower throttle settings on BOTH motors.

Do I need to richen up the low end a bit on both??

It may just need tuning. But a couple days ago I was BS'ing with the guys at the field and we discovered that all 3 of us had to replace the carburetor on our DLE engines to get them to run properly. One was a DLE-20 and two were DLE-30's. All three of us bought exact replacement DLE carbs. As the original poster of this thread, I now have about 14 gallons of fuel through my DLE-30 and not one single dead stick since I replaced the carb. YMMV, but that's my story. :D
 

3dmike

640cc Uber Pimp
I would like to bring [MENTION=335]SupaTim[/MENTION] into this conversation if he can. I know he's busy and he sells his gp lineup so it is a conflict of interest but I know his interest is in serving you guys so maybe he has a thought on it! He's worked on hundreds of these dle's while at valleyspew.
 
A few months back I bought a Great Planes Super Stearman from a fellow club member. It came with an OS FS-120 glow engine. Some of the older club members said it flew scale. I say it barely flew. :rolleyes:

So I just put a brand new DLE-30 in it. Absolutely trouble free on this one. Starts easy, idles smooth, quick transition, and I can fly inverted all day. As always, your mileage may vary.

Marc

cowl off.jpg
 

3dmike

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It looks like a beautiful plane! Can we see a pic of the whole plane?


Sent from my iPhone using Tapatalk
 
It looks like a beautiful plane! Can we see a pic of the whole plane?

Unfortunately I don't yet have a photo of the plane in the air or even at the field. I do have this photo taken the day I brought the plane home from its previous owner. I look like a proud new father. :D

When this photo was taken the plane still had the OS FS-120 in it and the faux radial that I removed when I installed the DLE-30.

Marc

Stearman.jpg
 

3dmike

640cc Uber Pimp
WOW What beautiful craftsmanship! Whoever put that together looks like they knew what they were doing! Beautiful and that spinner is awesome!

Thanks for sharing!
 
WOW What beautiful craftsmanship! Whoever put that together looks like they knew what they were doing! Beautiful and that spinner is awesome!

Thanks for sharing!

It's a Great Planes ARF, so it doesn't require THAT much skill. :) But I agree, it's a fine looking barnstorming biplane!

Marc
 
It may just need tuning. But a couple days ago I was BS'ing with the guys at the field and we discovered that all 3 of us had to replace the carburetor on our DLE engines to get them to run properly. One was a DLE-20 and two were DLE-30's. All three of us bought exact replacement DLE carbs. As the original poster of this thread, I now have about 14 gallons of fuel through my DLE-30 and not one single dead stick since I replaced the carb. YMMV, but that's my story.
biggrin.png

I believe you may be right....I spent a considerable amount of time at the field last week with the DLE 30 trying to get it to fly inverted without cutting out or acting up - no luck.
I bought the motor used so have no idea how old it is, I've owned it for 2 years and only recently have had problems with it; the original carb was a DLE carb.

I purchased a new Walboro carb from Tower Hobbies and installed it along with re-building the tank. I found that the 6 month old pick up line was stiff and I replaced the foam filter clunk (Fortitude tank) with a heavy metal DuBro clunk.

"My DLE35 runs the same way. I cannot seem to tune out the mid range burble without compromising reliability so I just live with it. I'm going to switch to a higher octane (90) and 40:1 to see if that may help a bit???"

AK Nick, I switched to high octane fuel, 32:1 mix of Stihl synthetic oil and re-gapped a new NGH plug to .022 - .024 a while ago and it helped eliminate some of the mid range burble - this inverted problem is recent and so severe that I dont dare fly inverted much less inverted harriers down low!

Wish me luck at the field today.
 
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