He said upgraded FW ones.
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Official Freewing MiG-29 Fulcrum Twin 80mm Thread
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Could this be the cause of the crashes?
Take a look at the fixing screw that holes the elevator on the shaft. The head of the set screw will imbed into the foam of the elevator and possibility stick. Maybe a grub screw would be a better choice to secure the elevator.
Yes, I had mine go in and it definitely was a elevator problem.
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Hi Duke...Can you provide details of your set-up, radio config, whether or not your crash was with the flaps down, etc. Regarding the flaps...since you reported it happened shortly after take-off, can you confirm you retracted the flaps?
Videos show flaps down and faster speeds is not a safe combination.
-GG
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Originally posted by duke View PostJust take a look at your elevator and see if the set screw has imbedded it shelf into the elevator. The first time this happens with a lot of pressure it may stick?
it is not clear to me how the set screw could get to be on the foam side of the cavity. When the plane is turned upside down for installing the FFS, the cavity in the FFS is down. The set screw is up...and away from all foam. To have the set screw on the foam side, you’d have to tighten it by digging a hole in the FFS???!!!
-GG
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Originally posted by duke View PostCould this be the cause of the crashes?
Take a look at the fixing screw that holes the elevator on the shaft. The head of the set screw will imbed into the foam of the elevator and possibility stick. Maybe a grub screw would be a better choice to secure the elevator.
Yes, I had mine go in and it definitely was a elevator problem.
I find a bunch of "assortments" on Amazon. Here is one that just has M2, but it is not much cheaper than buying an assortment:
https://www.amazon.com/Uxcell-a16022.../dp/B01FF3JKMA
Edit: After further thought, wouldn't this mechanism tend to stick the ele at full deflection one way or the other? That is not consistent with what we are seeing, with ele basically centered and not responding.
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Originally posted by duke View PostCould this be the cause of the crashes?
Take a look at the fixing screw that holes the elevator on the shaft. The head of the set screw will imbed into the foam of the elevator and possibility stick. Maybe a grub screw would be a better choice to secure the elevator.
Yes, I had mine go in and it definitely was a elevator problem.
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I think if the elevator gets stuck due to the head of that screw embedding itself in the foam of the stabilizer, that elevator would be at one of its extreme deflections (either UP or DOWN). Being that way, if one is stuck, then we would see a corkscrew. If both are stuck, then we would see either a climbing or a diving arc.
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Yes the flaps were up. I had just took off( put ldg/flaps up) made a right turn and was going to make a slow pass over the runway, then the plane started a slow to fast dive. Just before hitting the ground it seemed to pull up a bit. The elevators have deep indention where the set screws were hitting. Boot elevators were function after the crash.
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Originally posted by Skittercat View PostI had the MRC upgraded servos with 4-40 ball links.
-GG
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Originally posted by duke View PostYes the flaps were up. I had just took off( put ldg/flaps up) made a right turn and was going to make a slow pass over the runway, then the plane started a slow to fast dive. Just before hitting the ground it seemed to pull up a bit. The elevators have deep indention where the set screws were hitting. Boot elevators were function after the crash.
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Originally posted by duke View PostYes the flaps were up. I had just took off( put ldg/flaps up) made a right turn and was going to make a slow pass over the runway, then the plane started a slow to fast dive. Just before hitting the ground it seemed to pull up a bit. The elevators have deep indention where the set screws were hitting. Boot elevators were function after the crash.
I think this is something to watch for when you are building (you do want the screw-head centered), but doesn't seem like a problem as long as you do that. After a crash you might see deep indentations for the same reason - if the rod pops off at impact, the surface could hit this screw with momentum.
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