Katana v2 70 with YS Engine

[Aditya]

	Quote: Originally Posted by Eury
	That'll be an awesome setup. I flew mine today with a SuperTigre 90 in it, performance with mine is great, more than enough power to do anything, and hovers at about half throttle. The YS will smoke the ST for about the same weight, I'm sure yours will be awesome.

	Quote: Originally Posted by JohnVH
	Mine hovers no problem with awesome vertical, are you flying on top of a mountain? Go buy some 15% fuel and fly it.

1700' ASL, 32 deg celsius. AUW 3.5 kg (7.7 pounds).Have tried 10% nitro , engine not very happy with it, Very smooth otherwise on straight fuel. app 1-1/2 gallon since first start. What prop & muffler are you useing ?

[JohnVH]

stock engine, stock muffler, 15% fuel, hover is not a problem at all.. something is wrong

[Aditya]

What ? please let me have some Prop RPM figures !

[JohnVH]

I never weigh or tach my planes sorry.

[syma76]

i'm using byron 10% with 20% castor/synthetic...my engine is asp 91 4c with 15 x 4w. i'm not taching my rpm...but the plane hover very well...maybe u need to adjust ur high speed needle a little lean....

[Aditya]

Thanks, Syma I will be getting a 15x4 and will try again with 5% fuel at first. Thanks anyway John for your very positive statement that ST90 will hover it.

[JohnVH]

Yes, with an ST90 it has AWESOME vertical performance, mine rockets upward.

[Aditya]

The engine has settled down a little ! 15 flights ,APC 14X4W@10900, now wont hold well in a hover , but unlimited vertical even from a very slow pace. What is your AUW Syma ?

[XJet]

	Quote: Originally Posted by JohnVH
	Yes, with an ST90 it has AWESOME vertical performance, mine rockets upward.

But how much does yours weigh and what altitude are you flying at?

[syma76]

	Quote: Originally Posted by Aditya
	The engine has settled down a little ! 15 flights , 14X4@10900 now wont hold well in a hover , but unlimited verticaleven from a very slow pace. What is your AUW Syma ?

i dont weight my plane....if its unlimited vertical, then it should be no prob for hover....my asp only give me 7600 @ 15x4w....with engine 640g w/o muffler + 2 towerpro 996 mg at the back, and additional weight 60g to counter CG, i think my v2 not less than 3kg...

[Aditya]

[quote=Aditya;586328]1700' ASL, 32 deg celsius. AUW 3.5 kg (7.7 pounds).Have tried 10% nitro , engine not very happy with it, Very smooth otherwise on straight fuel. app 1-1/2 gallon since first start. What prop & muffler are you useing ?[/quote
It hovers, 20 flights now, 15X4 MAS@11480, straight fuel but pullout not good ,I wiil have to try
16X4 MAS or 15X4 wood. I also did a removeble stab convertion during build that added 60 grams
in tail wt-needed 180gm in the nose to balance the bird. ST90 w/muffler 765 gm, hitec HS625's in
tail .

[XJet]

You need to put that bird on a diet.

First, get rid of the 180gm of nose-weight -- that's doing nothing but ruining your pull-out.

If you need to -- relocate the engine further forward in the mounts to get the CG forward.

If you can lighten-up the rear-end, do so. Try carbon pushrods instead of the standard wire ones and there *are* lighter servos than the 625s that can also help.

Make sure your receiver battery is as far forward in the wing as you can get.

If you've got marginal pull-out you'll find that making the plane 180gm lighter will make a *huge* difference.

[JohnVH]

	Quote: Originally Posted by XJet
	But how much does yours weigh and what altitude are you flying at?

Hi, like I said I dont weigh my planes, unless its a review Im doing. I fly at close to sea level.

[Aditya]

	Quote: Originally Posted by syma76
	i'm using byron 10% with 20% castor/synthetic...my engine is asp 91 4c with 15 x 4w. i'm not taching my rpm...but the plane hover very well...maybe u need to adjust ur high speed needle a little lean....

Thank Syma,XJet .30 flights now. Engine much better, back to APC 16X4W @8400 after leaning the needle one
click .Hovers at 60/65% throttle.Put the cg back also, flat spins and waterfalls much improved.

[syma76]

glad to hear that aditya...hope u enjoy this awesome bird as well....