Posts: 154
Joined: 9/24/2006 From: Austin,
TX, USA Status: offline
Does anyone have a source for an aftermarket gear for this plane? I'm about 80% finished with my build (going to be using a YS110) and the gear look terrible.
Posts: 6478
Joined: 6/18/2002 From: Missouri City, TX, USA Status: offline
IMO Quique should seriously look into the quality of the main landing gear. Nobody would want to spend an extra $50-60 on an aftermarket gear, considering the price of the Yak69". In my Yak102" I had to also make some modifications to the main landing gear due to the bad tilt in the plane caused by the gear.
Posts: 98
Joined: 9/13/2005 From: Houston, TX, USA Status: offline
Finally completed my Yak and maidened it today. :-) I'm using a Saito 125, 16x6 prop, Cool Power 30%, Futaba 2.4 Rx, and various digital servos. I don't have a final weight, but preliminary weighings were putting it about 8 lb - excellent for the size. While the 6 pitch prop doesn't fly very fast, it has lots of pull - takeoffs are in about 10'. The most amazing thing is that I couldn't get it to stall in slow flight. I cut power and gave it some elevator and it just seemed to float in the air - and there was no wind to hold it up! I yanked the elevator at different times and couldn't get that to stall either. In very little time, I gained a lot of confidence in this plane. I'm still slowly moving the CG back and am almost where I want it (roughly neutral). This has resulted in nearly zero coupling in KE. The only issues I had were that the canopy rattles in the front (some foam saddle tape should do the trick) and the covering really loosened in the sun (the heat gun should solve that). Overall, I've very pleased with the results, though the assembly took much more time than I anticipated. Thanks to all of you who posted in this thread to help those coming behind you.
Posts: 6478
Joined: 6/18/2002 From: Missouri City, TX, USA Status: offline
Hi Alan, try the APC 16x4W prop. It's great for 3D type flying. I would also spray the inside of the canopy with silver paint (e.g. Tamiya mica silver) to prevent greenhouse heating effects. As you might be aware of, Futaba's 2.4 Rx could be temperature sensitive.
Posts: 98
Joined: 9/13/2005 From: Houston, TX, USA Status: offline
Mike,
Thanks for letting me know about the Futaba 2.4GHz RX heat issue - I had not heard about it!
I read another thread where Mike McConville from Hanger 9 also liked the 16x4W for 3D. The only reason I didn't try that was I thought it'd be too slow. With the reduced weight (significanly lighter than the 16x6 since it's flat/wide), what rpm should I expect to get? I'm wondering if the increase in rpms may partially offset the speed reduction from the lower pitch. I'm getting about 8700 max from my 16x6 with 30% fuel.
Posts: 6478
Joined: 6/18/2002 From: Missouri City, TX, USA Status: offline
Hi Alan, my Saito 125 on 15% coolpower and APC 16x4W (with TT spinner), I'm getting about 9700rpm peak but I richen it to 9400. I set my idle at 1800-2000 rpm. I also use a cline regulator with it. The valve lash is set to 0.002"
I also add a couple of ounces of Klotz Benol castor to every bottle of coolpower for the added protection.
< Message edited by rajul -- 9/30/2008 12:09:32 PM >
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All Forums >> RC Airplanes >> Giant Scale Aircraft - 3D & Aerobatic >> Quique's Aircraft Support >> RE: New Somenized (TM) 69", Yak-54 
RE: New Somenized (TM) 69", Yak-54 - 
