Skywalker 1900 maiden and crash.

Started by helimadness, June 30, 2013, 04:02:19 PM

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helimadness

Quote from: krikey on July 04, 2013, 10:38:42 AM
When you power up the motor on the bench with the prop on, the SW should want to fly away and there should be quite a bit of force to it.

a single 2600 in the front sounds a bit on the light side although I'm not sure what else you have up there. I have 2 x 2200 3S and 1 x 800 2S to power the gubbins, most of the remaining gubbins is over the C of G apart from the VTx out on the boom on mine and this balances it out fine. As people have already said, best to be more nose heavy than tail heavy as the plane becomes very twitchy if tail heavy. Stick another smaller battery or weight in the nose and see if this helps.

I wonder if its still too tail heavy and the motor isn't man enough to provide the force to pull it out of a continuous wing stall situation? Having more wing area will produce much more lift so in theory less power is required and you can float around for longer. If you're continuously on the edge of a stall as the CofG is incorrect then turning will reduce lift even more.

My advice (for what its worth) is stick some more weight gradually in the nose and see what happens.

Prop is in the bin as in 2 bits. It was tight on the shaft when I removed it. And are 99% sure it was the right way. When going to 50% power for launch I was actually surprised how hard it pulled. I had to really hold it hard. So fairly sure it was right. I expected it to have a lot of power with the amount of pull it had. I would guess more than the weight of the plane?
yes was very light with the 2600 4s and 1800 2s flight pack. I had them hard forward plus another 135 grams under the canopy to get the COG maybe 5mm aft of the servo wire line in the wing. When I first launched it seemed ok. My first flight was very tail heavy which was obvious.

Is it possible to be going too fast for the small servos to move the elevator? I am fairly sure it was full throttle most of the time and it was going fairly fast when it hit. You can hear a decent whack on the vid when it goes in.

I have the Emax ES08MA servos 2kg at 6v running at 5.3 from the UBEC

Just a thought. The motor has been broken off a couple of times and glued back on. The clearance on the prop to the tail looked at the same and the broken bit of fuse flitted back in fairly neat. But I assume the angle of the motor is fairly sensitive.

Cheers



helimadness

Quote from: Steve W on July 04, 2013, 10:59:51 AM
Do you have the propeller on the right way? There should be some raised writing on one side of the prop saying something like 8x4E (depending on prop).. this writing MUST face the direction of flight otherwise you'll get next to no power and it will really struggle.

Like Krikey says, and even at half throttle to be honest, a SW should be wanting to jump out of your hand.

Other than that I guess it's just a learning curve.

As mentioned above 99% sure it it right. Have taken off already. It did have a lot of pull.
I have a spare motor for my trex 500 and some 6s lipos. That might fix it.  :o

Yeah like you say think its just a learning thing. Just not really sure how they should handle and how to fly it. Just surprised how far wrong I am. Does anyone have one for Phoenix Sim ? The planes I have been flying in the sim are fairly responsive. The heli have all been fairly similar as well.

Maybe also going too fast the foam elevator flap just bent? I have all the control flaps attached with fiber reinforced tape. I thought that was the way to do it. Maybe need a balsa flap so stronger and proper hinges. maybe just a collection of small things

Cheers

helimadness

Quote from: g.collins on July 03, 2013, 11:44:07 PM
Hi bud, Sorry for your loss, I would recommend a smaller lighter plane to learn to fly properly first, with less weight there is less damage and easier and quicker to fix.
:+ G

Can get a Sky surfer EPO 1410 with motor and ESC for under 30 quid delivered. Have a spare set of servos and could pinch any other bits form the SW for now. Would this be a good plane to learn on???? Fairly cheap.


FPVSteve

Sky Surfer is your standard EasyStar/Bixler clone - definitely an easier beast to tame than a SW if you're really struggling.

krikey

I toned down my elevator on the SW as it was deflecting too much and causing me to see saw through the air when I first started flying the SW. I added a dual rate to start with so unless you've done something really odd with the servo and mountings, the elevator should be fine.

What you will notice (and I have too) is turning from a downwind leg to a x-wind or upwind, especially in windier conditions, will stall the wing if you've not got the air speed. 100m diameter turning circle is nice and big so I can't see that this is your problem. However the SW can turn on a large sixpence in this condition.

Krikey

helimadness

Quote from: Steve W on July 04, 2013, 01:35:22 PM
Sky Surfer is your standard EasyStar/Bixler clone - definitely an easier beast to tame than a SW if you're really struggling.

Perfect. I have one in my cart. Off to USA for 3 weeks will click on the buy so it arrives home when I do :-)

Cheers