sorry guys - thoroughly reading isn't my strong-point either...
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Official Freewing B-2 Spirit Bomber 86" Twin 70mm EDF Jet
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Originally posted by jasmith41 View Post
Thanks - that's what i use to get the off, but those little wheel axle ones are a bugger to get back on when you can't see and shake a lot... :)
RC Informer suggests to put a dab of FoamTac on each C clip on a brand new plane so they don't pop off from all the vibration. It's horrible to try to land with one wheel missing.
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Originally posted by xviper View PostYeah, putting the little rascals back on is also a problem. What I do is to put a small dab of FoamTac on my finger tip, touch with opposing thumb so both fingers have goo on them. Blot the "C" clip with one finger, pinch with the thumb so that the C clip gets a little glue on both sides. Poke the C clip onto the axle and slide finger away, leaving the C clip on the axle. I then use a small hemostat to squeeze the clip onto the axle. Helps to have a magnet on the hemostat in case the C clip slips. However, when the clip is gooed up with glue, if it slips it kinda just sticks there.
RC Informer suggests to put a dab of FoamTac on each C clip on a brand new plane so they don't pop off from all the vibration. It's horrible to try to land with one wheel missing.
Took my A10 to the field just to taxi it for the first time last year, got her all hooked up, powered up the fan, she went 3' and the nose wheel took off diagonally...
It was really pretty funny... had no intention of flying it, but just the idea that the wheel came off could have been taken as a sign, but i wasn't discouraged...
I fly the sh*t out of it and it's one of my favs...
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Disappointing B-2 performance in grass today.
I removed the steering from rudder board pins to a separate channel as I always have done for rate and trim control. This was a mistake as the first several attempts were uncontrollable after the first steering correction input. This resulted in uncontrollable 90 degree direction changes and aborts.
Steering was reconnected to the rudder board pin where I discovered steering is gyro stabilized with very high gain, I suspect 100% on Yaw. The next several attempts were controllable and made straight runs. However, there was too much drag from wheels on the grass runway and or not enough thrust. The B-2 would accelerate to its max speed and stop accelerating. This speed was not enough to get rotation and airborne.
My next step will be to find a way to reduce wheel drag, hopefully by finding an easy strut and wheel replacement for the mains, ideally with one large wheel. Maybe a larger nose wheel would help also and provide some positive pitch attitude on the ground.
The other option is to make more thrust.
Suggestion welcome.
Gary
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Originally posted by viper1gj View PostDisappointing B-2 performance in grass today.
I removed the steering from rudder board pins to a separate channel as I always have done for rate and trim control. This was a mistake as the first several attempts were uncontrollable after the first steering correction input. This resulted in uncontrollable 90 degree direction changes and aborts.
Steering was reconnected to the rudder board pin where I discovered steering is gyro stabilized with very high gain, I suspect 100% on Yaw. The next several attempts were controllable and made straight runs. However, there was too much drag from wheels on the grass runway and or not enough thrust. The B-2 would accelerate to its max speed and stop accelerating. This speed was not enough to get rotation and airborne.
My next step will be to find a way to reduce wheel drag, hopefully by finding an easy strut and wheel replacement for the mains, ideally with one large wheel. Maybe a larger nose wheel would help also and provide some positive pitch attitude on the ground.
The other option is to make more thrust.
Suggestion welcome.
Gary
Good luck
Frank
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Originally posted by mikedlv1 View PostSeems I have seen conflicting info on here as to if the gyro controls the nose steering on the b2……so has anyone confirmed if does or not….
I have mine on separate channel but with the wind i have not been able to test….
I intend to increase the "travel" on the master gain to 110% (or more) and use that for take off and landing, dialing it back just after lift off and dialing it back up just before landing. Also from some reports, it would seem that the stock 100% gain on the rudder is primarily for ground handling since those who have dialed the gains to zero have not noticed a significant degradation in yaw stability. The roll gain for higher speed flying seems too high @40%, so dialing the master gain to say, 90% (or ~35% real gain), might be the ticket.
If you've removed the steering servo from your gyro, you'll very quickly be able to see the affects of the ground roll and determine the validity of my previous "theories".
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Originally posted by xviper View PostMine hasn't arrived yet so can't really "confirm" this. However, if you read about those who have removed the steering servo from the gyro, reports appear to indicate that without the gyro on the steering, this plane can wander all over the runway. Re-connecting it to the stock gyro or installing a steering gyro fixes the wandering. To me that tells me that the gyro does intervene in the steering servo function.
I intend to increase the "travel" on the master gain to 110% (or more) and use that for take off and landing, dialing it back just after lift off and dialing it back up just before landing. Also from some reports, it would seem that the stock 100% gain on the rudder is primarily for ground handling since those who have dialed the gains to zero have not noticed a significant degradation in yaw stability. The roll gain for higher speed flying seems too high @40%, so dialing the master gain to say, 90% (or ~35% real gain), might be the ticket.
If you've removed the steering servo from your gyro, you'll very quickly be able to see the affects of the ground roll and determine the validity of my previous "theories".
From the A3S3 manual: User defined mode allows you to decide which mode to use on each axis separately. Currently there are only 3 options available for choosing: Gyro-Off mode, Normal mode and Atti-Lock mode.
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Stock wired the steering and drag brakes are both gyro'ed and to the same rate. If you decrease the gyro gain by connecting the E-52 gain pin to a receiver slot the steering gyro gain can be increased or decreased along with the drag brakes (yaw) and elevons (pitch and roll).
Originally posted by mikedlv1 View PostSeems I have seen conflicting info on here as to if the gyro controls the nose steering on the b2……so has anyone confirmed if does or not….
I have mine on separate channel but with the wind i have not been able to test….
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Originally posted by Evan D View PostStock wired the steering and drag brakes are both gyro'ed and to the same rate. If you decrease the gyro gain by connecting the E-52 gain pin to a receiver slot the steering gyro gain can be increased or decreased along with the drag brakes (yaw) and elevons (pitch and roll).
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As an aside since a few people on RC Goofy have had tense moments when taking off / landing when a cross wind has caused sudden wing overs and resultant crashes ..........................
Has anyone tried to take off and land in "trainer mode"? Isn't that mode a bank/pitch limiter and also a self level capability? If that is so, wouldn't trainer mode help more in cross wind take offs and landings, just as SAFE does for those planes equipped with it? In cross winds, I take off and land my Eflite 90mm Viper and 80mm F-16 in SAFE and there isn't a hint of roll disturbance. Same goes for my VTOLs with SAFE "equivalent". Convergence and Flex FV-31 Cypher when hovering and when taking off/landing in "limiter" mode are very unaffected by cross winds.
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Originally posted by mikedlv1 View PostSeems I have seen conflicting info on here as to if the gyro controls the nose steering on the b2……so has anyone confirmed if does or not….
I have mine on separate channel but with the wind i have not been able to test….
It is easy to check. Just power up the jet and verify a solid red light on the gyro. Then pick up the jet and move it back and forth in yaw directions and watch the corrections on the nose wheel and drag rudders.
Gary
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Originally posted by Radar-Guy View Post
I‘d suggest to check posts #536, 552 and 679 of this thread. More thrust won’t be needed with these modifications. Good luck
Frank
Thanks for sharing your mods.
Gary
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