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Offline rclad  
#31 Posted : Wednesday, June 21, 2017 2:59:55 PM(UTC)
rclad

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Originally Posted by: Doug Pilcher Go to Quoted Post
Once the CG is correct, (and CG correct can not emphasized enough) and with the patience to WAIT for the stall and not try to force it because it seems to be forever, it will indeed stall. Up elevator, little rudder to keep your direction and WAIT. Hardest thing for me to learn but it was told to me and learned and it works!


I flew through 10 sequences yesterday and waited patiently for that stall, and you are right! With only ten degrees up elevator (at max throw), and waiting what seems to be forever, I finally could spot the sudden nose drop. Throwing full rudder (set at 20 for now), then aileron, I got a very nice stall/spin almost every time. Thank you! Weather also helped me see this for the first time: I had clear blue skies and almost no wind. Perfect!

Thanks to everyone for all the good tips. My plane is flying really well now and I'm ready to compete! See some of you on Friday in Ashley.
thanks 2 users thanked rclad for this useful post.
Doug Pilcher on 6/21/2017(UTC), Dangerous Dan on 6/21/2017(UTC)
Offline Orthobird  
#32 Posted : Sunday, July 16, 2017 7:55:38 AM(UTC)
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Question for you all

Trying to trim an airplane for IMAC

If I

Fly straight level, full power. Chop throttle down. Airplane maintains trajectory. Does not pitch up or down abruptly.

Ok, pull for up line, at first looks ok first 100 to 150 feet but then , pushes hard to gear??

Inverted flight at 45, will fly level 45 or slightly pull towards canopy


Diagnosis?
Wish I could fly everyday!
Offline Dangerous Dan  
#33 Posted : Sunday, July 16, 2017 8:53:45 PM(UTC)
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As u know my theory is positive insidence. Deflect both ailerons up 1.5 deg. Lol
Offline Kevin Wilson  
#34 Posted : Monday, July 17, 2017 6:46:28 AM(UTC)
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Does the plane have down thrust? How much? What is the wing and stab incidence?
Offline Orthobird  
#35 Posted : Monday, July 17, 2017 7:13:16 AM(UTC)
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Originally Posted by: Kevin Wilson Go to Quoted Post
Does the plane have down thrust? How much? What is the wing and stab incidence?


Hi Kevin, thank you so much for replying.

The model has 3 degrees right thrust and 1 degree up thrust.

The wings have ever so slight dihedral and they are at 0.5 degrees positive incidence, which was recommendation from the manufacturer of the kit.

the stabs are at ZERo degrees incidence.


(I built the airplane so that may explain some too!! LOL
Wish I could fly everyday!
Offline Kevin Wilson  
#36 Posted : Monday, July 17, 2017 7:20:11 AM(UTC)
Kevin Wilson

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Hmm. I would think you would need a degree of down thrust instead of up, but I am not very familiar with Daltons. Mine was opposite in that it was pulling to the canopy on uplines with zero thrust and incidence so I added 1 degree of down thrust and drooped the ailerons slightly and that fixed it. Not sure why you would be going to the belly with that setup...
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