90 Size Seagull Yak
11-05-2011 | 11:56 AM
#26
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From: Edmond,
OK
RE: 90 Size Seagull Yak
I used Ohio Superstar Super Heavyweight CA hinges and doubled the number, 8 in each aileron and 5 in each elevator half. I'm waiting on parts for my Saito 125so it'll be a while before I find outhow they hold up. I was thinking about using somefiberglass cloth strips and epoxy to reinforce the firewall joints andthe wheel pants mount area. Thoughts?
11-06-2011 | 05:56 AM
#27
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RE: 90 Size Seagull Yak
ORIGINAL: RCVFR
raydar, we talked a bit about the CA hinges earlier in the thread... Yesterday, I flew flights #14 and 15 on my YAK, and as I was preparing to position the tail onto a restraint in preparation for the next flight, I pulled on the rudder and the hinges pulled out!! They were smooth, no evidence of bond with the wood. It did show color at the hinge line from the covering material so there is evidence that there was CA there.
raydar, we talked a bit about the CA hinges earlier in the thread... Yesterday, I flew flights #14 and 15 on my YAK, and as I was preparing to position the tail onto a restraint in preparation for the next flight, I pulled on the rudder and the hinges pulled out!! They were smooth, no evidence of bond with the wood. It did show color at the hinge line from the covering material so there is evidence that there was CA there.
I replaced them with Dubro nylon hinges, but now I'm wondering about the rest of the CA hinges. So far, no indicator of looseness, etc.; but I'm spooked.
Also, after the second flight, just about every bolt on the front end was loose. Motor mounts, cowl screws, etc. I have a Laser 150 in there, so it for darn sure isn't over-powered. And there was no obvious bad vibration.
If the weather cooperates, I'm going to fly it again today. The two flights I've been able to manage were okay, nothing alarming... but I don't have enough engine in it for serious aerobatic work. Seems like it would be a relaxing sport flyer; I'll give it every chance, but right now its on probation...[sm=confused.gif]
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11-08-2011 | 01:53 PM
#28
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From: Oxford,
ME
RE: 90 Size Seagull Yak
ORIGINAL: WHIP
Hi, would like to know why you did not mount engine on angle it came from factory? thanks bill,
Hi, would like to know why you did not mount engine on angle it came from factory? thanks bill,
The factory mounting points are for glow engines. Gas engines we generaly mount with the piston down which makes for the best position for the least amount of ugly holes in the cowl showing.
I have also had issues with the CA hinges on this bird with a gas engine. I went to robart hinges, no more issues. its an inexpensive mod and well worth the time.
