First fixed wing Help!!!!

[easypickingsere]

I dont know if anyone can help with this.

I recently got a Hyperion Sniper 2 and have only managed to try it out twice, each time has ended up with a crash. What happens is it takes off from my hand fine then 10 seconds to 20 seconds it rolls left then spirals into the deck nose first.

One of the lads I fly with told me its out of lateral balance and told me a way of getting it sorted. Stick a hook in the fuselage by the nose and one just infront of the rudder and then suspend the model so I can add wieght to the lighter wing to get it balanced. However I did this last night and the model just sits pretty much level???? If I hold the thread of the prop mount and put a finger under the foam "tail gear" it drops to the left every time quite quickly. Does anyone know how I can trig it up so I can add weight to get it balanced please?

I hope someone can help to save me keep pestering my mate on here with PM's about this.

Cheers

Mark

[tiddler]

Wouldn't have thought lateral balance comes into it much with that model. Are you sure its not just out of trim on the ailerons and or the rudder ?

[easypickingsere]

Not sure if its out of trim tbh Graham I not had chance to do anything with the trims as said 10 to 20 seconds before it spirals left to the ground. No amount of full right Aer has corrected it and as said it definately is heavier on the left wing, so much so that it drops the minute I let go of the sides of the fuselage when balanceing it with my hands.

Cheers

Mark

[tiddler]

Well the only things I can think of off the top of my head is.

Are both aileron servos identical and weight the same?

Is the wing centred corectly in the main fuselage?

Are you sure its not just going into a stall through too much up elevator trim?

[Si_B]

Is you have a very rearward c of g, you might end up with similar flights. Balance the front of the thread poking out the front of the prop on the edge of a table, and just balance the underside of the fuz on the edge of your had (somewhere near the tail). This should give you an idea of how far out the lateral balance is. As said earlier, it's unusual for a foam model to be that badly out to cause a spiral. You sure none of the controls are reverse etc.

[Cagey]

If it drops a wing as quickly as you say, statically it must be a weight issue. Doing the same in the air is more than likely to be torque induced, which is normal without right side thrust to counter act it. So double check your motor alignment for that given in the manual. Hang the model on thread looped around the prop driver and on a pin in the top of the fin, it's rare to get a foamie that's perfectly balanced laterally, and isn't critical for sport flying, if needs tho' add a nail or similar at the light tip. Remember take off is the bit when all planks veer to the left, sometimes alarmingly so you have to compensate with opposite aileron instantly. Double check aileron neutrals too. Good luck.
Edit : Looking at the pic in your post, the aerofoil section of that stbd. tip looks to be inverted, i.e. more curvature on the lower surface, weird cos that'd make it roll to the right ! Hmm ?

[easypickingsere]

Thanks for the ideas so far lads, just uploading some video to youtube so you can look at it for yourselves, I have ballsed up by 3-4mm on aer servo measurement which is obviosly where the inbalance is coming from

Cheers

Mark

[easypickingsere]

Ok heres the vids I took.

On the stick movements one im doing, left, right, nose up, nose down and rudder is definately left and right as it should be.

Cheers

Mark

[URL="http://www.youtube.com/watch?v=LGCVEOqc9lg"]YouTube - ‪outofbalance.AVI‬‏[/URL]

[URL="http://www.youtube.com/watch?v=vXey5t6nTMU"]YouTube - ‪flapmovements.AVI‬‏[/URL]

[ShinySideUp]

[QUOTE=easypickingsere;672448]I dont know if anyone can help with this.

I recently got a Hyperion Sniper 2 and have only managed to try it out twice, each time has ended up with a crash. What happens is it takes off from my hand fine then 10 seconds to 20 seconds it rolls left then spirals into the deck nose first.

One of the lads I fly with told me its out of lateral balance and told me a way of getting it sorted. Stick a hook in the fuselage by the nose and one just infront of the rudder and then suspend the model so I can add wieght to the lighter wing to get it balanced. However I did this last night and the model just sits pretty much level???? If I hold the thread of the prop mount and put a finger under the foam "tail gear" it drops to the left every time quite quickly. Does anyone know how I can trig it up so I can add weight to get it balanced please?

I hope someone can help to save me keep pestering my mate on here with PM's about this.

Cheers

Mark[/QUOTE]

Have you got a broken gear on one of your servo's? Move all control surfaces one the ground and listen for any 'clicks' from a servo.

[dav20043]

your ailerons are reversed

[challis349]

[QUOTE=dav20043;672527]your ailerons are reversed[/QUOTE]

was going to say the same, if you put in left aileron, your left flap want to go up, put in right, the right flap goes up

[easypickingsere]

Cheers Dave! and Kev! Bloody hell so I been thinking Im correcting and just making it worse lol

[tiddler]

Ooops :ack2: no wonder you was having a spot of bover.

[easypickingsere]

Servos corrected will pop down Wickes after tea for some panel pins to sort the balance. Double checked the manual Cagey and the mount is installed correctly.

Thank you all for the help hopefully I can report back with good news should the wind drop for me to test it

Feeling like a large numpty now on the aer issue lol


Cheers

Mark

[barryorbik]

Dont feel too ashamed as you are not on your own getting the ailerons reversed, one of our most experienced fixed wing pilots put his new pride and joy in on its maiden flight because he had them reversed. Another point is that most fixed wing flyers tend to use only the ailerons to induce turns and they almost ignore the rudder unless doing knife edge moves, stall turns or turning on the runway etc.