ZENGSM62

I have a DLE-35RA on a Phoenix 78" Extra 260 which weighs 14.5 lb with 8oz up front to get it to balance, unlimited vertical.
Considering an OS GF40 4 stroke on a similar size aerobatic plane.
My DLE-35RA turns a ZOAR 19-3Da at 7650 rpm"s
an APC 19x8W at 7650 rpm"s
What rpm's are you getting out of the OS GF40 with what props?
Don't mind the $ if it works the way I want, good reliable power.
Been out of the hobby for about 10 years, got about 20 flights this year so far, good to be back.
Thanks
GSM

Tom ling

Hi mate the Os 40 will Idle at 1300, peak rpm is 7500 with a beila 19x8 so very similar power to a DLE 35RA and a nicer idle. Vibration much the same as the DLE too. Very nice engine.

ZENGSM62

Thanks, lot of money if it's a bad or not good engine.
GSM

Tom ling

It does look like a very nice engine, a friend of mine ran some props yesterday on his, these were results.


19x8 Biela = 7520
19x10 wood = 6630
18x10 wood = 7650
20x8 wood = 6540
20x10 wood 3D = 6600

hope this helps. 👍

ZENGSM62

Helps a lot, just got my OS GF40 today from Tower Hobbies, see if I like it, expensive if I don't.
Not sure about the DLE35 I got earlier this year yet, I'll give it some more time before I give it rating, power on the DLE35 if very good, 7750 on a APC 19 x 8W, 15lb plane easy unlimited vertical.
GSM