and sluggish on the sticks
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1. Mine is not "very" nose heavy.
2. Nose heaviness does not imply sluggish (and normal) behavior. I can make this thing spin like a top if I turn off AS3X and put the rates up to 125%. I want AS3X. Sluggishness is not a function of being nose heavy.
3. I've already said this plane has a huge range of CG. It doesn't matter where, within this CG range, the plane still flies the same.
4. As is, I have no problem landing in high alpha. It isn't hard at all.
I have other planes that are balanced nose heavy and when the stabilization is turned off and the rates turned up, they roll like crazy. Otherwise, they are sluggish.
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All repairs finished and ready to fly again. Things to notice... added a gyro; not because the plane needs one but it was the easiest way to get tailerons and improve roll rate. Added a 4.8v NiCd pack as a redundant Rx battery. Routed the Rx antenna outside the fuselage to prevent getting blanked by the battery when the plane is coming head on.
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Originally posted by radfordc View PostAll repairs finished and ready to fly again. Things to notice... added a gyro; not because the plane needs one but it was the easiest way to get tailerons and improve roll rate. Added a 4.8v NiCd pack as a redundant Rx battery. Routed the Rx antenna outside the fuselage to prevent getting blanked by the battery when the plane is coming head on.
Hugh "Wildman" Wiedman
Hangar: Mig 29 "Cobra", 8S EuroFighter-Bronze Tiger, A-10 Arctic, F18 Canadian & Tiger Meet, 8S F16 Wild Weasel, 8S F4 Jolly Rodgers & Blue Angel, 1600 Corsair & Spitfire, B-24, Stinger 90, Avanti. Extreme Flight-FW-190 Red Tulip, Slick 60, 62" Extra 300, 62" MXS Heavy Metal, 62" Edge Demonstrator. FMS-SU-30,1700mm P-51, Corsair, Viper, Beast Bi-Plane 60", P2 Bi-Plane, P51.
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CG was ~145mm...about a half finger in front of the 150mm marks. I will need to recheck after the repairs. The plane may be just a little lighter....The gyro and battery added weight, but I removed all three gear doors and door servos. Two of the doors were broken so just removed them all.
I used the Zeee 5200 (770g) and the CNHL 5000 (824g). First landing was without air brake and then the next ones were with the airbrake....lands better with.
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Originally posted by radfordc View PostCG was ~145mm...about a half finger in front of the 150mm marks. I will need to recheck after the repairs. The plane may be just a little lighter....The gyro and battery added weight, but I removed all three gear doors and door servos. Two of the doors were broken so just removed them all.
I used the Zeee 5200 (770g) and the CNHL 5000 (824g). First landing was without air brake and then the next ones were with the airbrake....lands better with.Hugh "Wildman" Wiedman
Hangar: Mig 29 "Cobra", 8S EuroFighter-Bronze Tiger, A-10 Arctic, F18 Canadian & Tiger Meet, 8S F16 Wild Weasel, 8S F4 Jolly Rodgers & Blue Angel, 1600 Corsair & Spitfire, B-24, Stinger 90, Avanti. Extreme Flight-FW-190 Red Tulip, Slick 60, 62" Extra 300, 62" MXS Heavy Metal, 62" Edge Demonstrator. FMS-SU-30,1700mm P-51, Corsair, Viper, Beast Bi-Plane 60", P2 Bi-Plane, P51.
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Got a break in the winds today and flew five flights. With the tailerons set at max throw as shown above the rolls were blurry fast. I ended up with the following settings: End Points for ailerons 60/60; elevators 80/80. Tail movement measured at the trailing edge of the stab: aileron High rate 23/23mm; Low rate 17/17mm; elevator High 35/35; Low 20/20. Expos all set at 40%
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Originally posted by radfordc View PostSome short video of todays flights. Most of the flight was edited out in order to avoid the dreaded "black dot in the sky" syndrome. I really need to work on landings...coming in too fast.
https://youtu.be/-UMQPwgJpv8
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Adding the tailerons to this plane did require just a little "tweaking". I used a cheap Hobbyeagle A3L gyro. The gyro does the mixing for the tail internally so you don't have to do anything in the Tx. But, because the tail and the wing ailerons needed to move in the same direction I did have to reverse one of the tail servos. I took the servo apart and switched the motor wires and the two outside wires on the pot. This of course meant removing the servo from the plane which meant removing one EDF and the ESC cover to get the servo wire unplugged. Not a big deal.
A way to avoid this would be to not use the wing ailerons at all. Configured like that you wouldn't have to change the direction of the tail servo physically, but could do it in the gyro programming. I think the plane would roll great with just the tailerons. Then you could use the wing surfaces as flaps only. I might give that a try.
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I do just that - elevons on the tail and wing ailerons only working as flaps. It flies great! Simply adjust travel for roll or pitch to suit your preferences. This jet lands perfectly with flaps full down and speed brake out. Performance could be better. A jet this size should have been made with 2 fully separate systems. The ease of 1 battery is certainly a plus. Not the fastest out there but it will power thru the maneuvers just fine.Fly low, fly fast, turn left
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Originally posted by nuts-n-volts View PostI do just that - elevons on the tail and wing ailerons only working as flaps. It flies great! Simply adjust travel for roll or pitch to suit your preferences. This jet lands perfectly with flaps full down and speed brake out. Performance could be better. A jet this size should have been made with 2 fully separate systems. The ease of 1 battery is certainly a plus. Not the fastest out there but it will power thru the maneuvers just fine.
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Originally posted by xviper View Postbut using a HobbyEagle A3L will limit the gyro control to only the tail.
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Originally posted by radfordc View Post
In rate mode and the gains at 50%, the gyro was too sensitive and the plane was rocking side to side. I turned the gains down to 25% to get things smooth again. This plane really doesn't need gyro stabilization at all. Solid in the air.
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