30% TOC wont hover.

[WangoTango]

	Quote: Originally Posted by srm 99
	heres a video of mine a mate showing what it can do.... YouTube - yak

I'm detecting drum, block and cowbell in that music....... That YAK can't help but hover good when you have good drum, block and cowbell music!! LOL!

WangoTango

[66stang]

First off remove the big fuel tank. Then balance the plane on the wingtube for starters. then lateral balance the plane. After all that do some up lines and down lines to check motor thrust angles. But don't do anything until you have the plane balanced. After that use a 22B or 23A vess prop. Make sure you have enough rate for 3D in your controlls. Also make sure none of your mixes are causing problems. Way to many people put mixes in for things only to find they screw something else up. If you have them on a switch turn them off and try with out them.

[classclown]

	Quote: Originally Posted by borealnw
	I know when you first looked at the thread heading you thought another newbie with not enough practice. Well this is deff the plane. Plane 30% TOC yak 54 Engine DLE-55 Servo's hitech 7985's all around 7965 throttle and JR 8711 rudder Prop Vess 23A Weight dry is 17 1/2 pounds Full 18 1/4 CG is set just a little to the back. Another words in inverted 45 it climbs slightly. Surfaces Elev endpoints at 45* Ail 40* Rudder 40* TX high rates Expo at 80 Modes I've already done. Mounted the fuel tank 24 oz. under the wing tube in the canister tunnel. Ok I have a few mixes for knife edge both ways clean and stable. All summer I've been fighting this plane in a hover. Today I let two of the hover veterans fly it and low and behold they could not get it to hover either. ( and these guys are the best I've ever seen at hover) Problem The plane is very unstable at any latitude and throttle position. As long as it is climbing slightly then it locks in but as soon as you lower it to drop the plane or hold it on one postition it leans to the wheels. At least 3/4 on the elevator to hold it for half second then pump on the elev to correct. We pitched it back and it holds a second then falls out. I oraganally set up the plane for IMAC but it will soon be replaced with a larger plane so I thought set this one up for 3D and freestyle and huck it. That said I had to add 5 ounce of weight to the nose to get it to balance at CG stated above. It flies IMAC on rails right thrust is just a little out so I need to give it a little on upline entry. Anyway everything in the kit is stock Alum LG, wing a stab tubes. Any ideas?? Some think it is a thrust issue another said to take out the 5 ounce of weight. I can fix a thrust issue but would like to keep the CG where it is in case I need a IMAC back up.

80% EXPO?!?

[bodywerks]

24 ounce is still WAY too big. And mounting it below the wing tube makes the vertical balance 'gear heavy'. Many people don't pay attention to vertical balance but it matters, especially if you want to hover all day long. Mount a 16 ounce tank, above the cannister tunnel, put all your batteries as high up in the fuse as possible(on top of the engine box is ideal), and balance the plane with a half-tank of fuel. And if you are noseheavy it will make hovering harder so set the CG neutral at the very least - and rolling inverted and watching the plane fall or climb is not the best way to check CG!!!!!! YOu just need to fly it and feel it out, and stall it and see how it stalls if it drops the nose hard and at a relatively high speed you are too noseheavy, for example.
Of course, thrust line is important, too. fly straight and level at full throttle and then quickly chop the throttle. if the nose pitches up or the plane 'balloons' you have unneeded downthrust. Pull a full throttle vertical and let go of the sticks, it should track straight and true for 500+ feet. If not, fix it.

[bodywerks]

80% expo is too soft. 35-45% on ailerons and 50-60 on rudder and elevator on 3D rates.

[borealnw]

Yes I have another thread on mismatched servo's and no I did not have them in the wrong channels. I didn't say I was not a newbie I said before you think this in another newbie. I also stated that two of the best pilots, who happen to fly at my field couldn't get it to lock in. Nice try though NEXT.

[classclown]

Sorry

[3ddd]

hey clown that was not called for ,no matter at least he is asking and trying to learn so back down dude

[sinergy]

	Quote: Originally Posted by borealnw
	Ok straight and level the plane has a tendency to climb, just enough to add on click of down trim. In inverted 45* downline it falls to the canopy so I mixed in less elev trim at idle.

Why are you mising elevator trim in on a 45 downline at idle or anything of the sort?? The only reason to do this is for a downline mix. A straight vertical downline. You don't mix 45 lines.

	Quote: Originally Posted by borealnw
	Again I have the CG set at neutral inverted. But after chatting with some that went to TAS they all came back saying make it nose heavey just a smidgen. So this is where I was going next. Then redo all the trims and mixes.

Your CG is not neutral. You originally posted it climbed in an inverted 45.. that is tail heavy, no way around that.


Get rid of all of your mixes and set your CG up properly. You are just chasing your tail here and will continue to unless you trim your plane in the proper order.

[almmendes]

My 2cents would be engine thrust.

I ahd that happen on my 30% SD Yak and after I gave it 1/8" right it lock down super easy...

Hope it helps

[3DHobbyShop]

Sounds like primarily a lack of fuel burning. Try burning more fuel, see if that helps. In almost all cases, it does.

[airboss/oc]

drop some weight and get one of these, 3W55xi comp series

[Flatlandman]

The weight or the fuel tank isnt keeping his plane from hovering. Its the setup and pilot skill.

[Big A]

You have alot of heavy weights with alot of things you need to address; no doubt.
Food for thought, you also might try and level the fuse set the plane so the canopy rail is at zero (canopy removed).
Then with the prop off; check the front of the engine so you know where the thrust is before adjustments (Up and down thrust).----------Just so you have a reference before you start with corrections if there are any that are needed.

A

[classclown]

	Quote: Originally Posted by 3ddd
	hey clown that was not called for ,no matter at least he is asking and trying to learn so back down dude

3ddd, your right. Think I was sorta possesed last night. borealnw, sorry I went off on you. Something set me off last night and I guess I got my mind out of control. SORRY DUDE!!! Couple things on your plane. Get a 16 to 20oz fuel tank, it will still give you 12 to 15 minutes, anything more than that, you might piss some other flyers off anyway, pull it out of the cannister bay, place it up higher, I like to place them in line of the motor, just ahead of the wingtube. Reset your cg, I like my stuff set slightly behind the cg point. Change your expo rates to the 30 to 42, 44% on the high rates setting. Where ever you can, shave off weight, the more the better. Put the plane in the air, like someone said earlier on the thread, get off full throttle, level flight, if the plane noses down, your motor is aimed too high on their mounts, and vice versa. Take the plane, full throttle straight up, let go of the sticks, if the plane tracks perfectly straight, don't change a thing, if it veers left, then you need to shim in some more right thrust, and vice versa. You added 5 oz of weight to the nose, can you get rid of it and shift stuff around? I never add weights to cg a plane. NEVER. Anyway, I'm late for work, gotta go. Again, sorry I screwed with you, it was uncalled for. Thanks for straightening me out 3ddd!!!