QQ yak 54 69 '' Q....

[ALANXP]

hi

what spinner do i need for this model?what prop do i need for a saito I was thinking of fitting a 16x6 or a 15x6 (fule 18% oil 20%nitro).

thanks alan

[Reza]

Hi Alan,

What size Saito? If 1.25 then I think 16x6 would work fine!
3 1/4" spinner is fine!

[ALANXP]

thanks reza i realy enjoyed your video of the yak 54 (ys110) and i found your 3D videos very helpful.Did you loacate the tank on the cg by using a pump i planing to fly imac and freestyle?

a few more:
what li po do I need to run 4 hi thech servos(5645) ,one mirco digi and on bord glow (webra), and how many amps i perfer from hobby city http://www.hobbycity.com/hobbycity/s...idProduct=6519


Alan

[Reza]

Thanks very much Alan!
You need a two cell 2000-2600 li-ion. I don't think you would need any Lipo since you don't need a high discharge rate but you certainly can use lipo if you want! I mounted the tank on the tank tray just like I showed in the manual! It is not on CG but I hardly saw any CG shift. Mainly in landings when the tank is almost all empty, it would behave a tad tail heavy nothing to worry about!

For throttle, use an analog servo, and standard size! I am always leary on the small digital servo. 4 stroke enignes do vibrate and I am afraid your mini digi servo can be at risk of failing!

I did not use a pump nor an onboard glow since those would add more weight and I built it very light! With YS 1.10 it was 8 1/2 lbs. Rocket power, very light wing loading! I still have the plane and is my favourite!


Have fun,
Reza

	Quote: Originally Posted by ALANXP
	thanks reza i realy enjoyed your video of the yak 54 (ys110) and i found your 3D videos very helpful.Did you loacate the tank on the cg by using a pump i planing to fly imac and freestyle? a few more: what li po do I need to run 4 hi thech servos(5645) ,one mirco digi and on bord glow (webra), and how many amps i perfer from hobby city http://www.hobbycity.com/hobbycity/s...idProduct=6519 Alan

[ALANXP]

reza

my firiend of mine told me to mount the engine upsidedown because if I mount it on its side I have to add weight on the wings?

[Reza]

I mounted the engine sideways! I didn't notice any problems but I am sure if you get really precise then you see a little difference. It is true that weight on one side is more but the distance or your moment arm is small so it translate to a little difference.

	Quote: Originally Posted by ALANXP
	reza my friend of mine told me to mount the engine upside down because if I mount it on its side I have to add weight on the wings?

[ALANXP]

thanks agian Reza

can i use a 1000mah 7.4 v li po and 8amps reg?

[Reza]

Sure! Although I am not sure if you can get many flights with that battery before needing to charge!
I would consider a 2000 mah just to be on the safe side! Or just use 2500-2700 5 cell NIMH an no regulator or one A123 1100 and no regulator!

	Quote: Originally Posted by ALANXP
	thanks agian Reza can i use a 1000mah 7.4 v li po and 8amps reg?

[octanehuffer]

I have a Saito side mounted on this plane. Wouldnt do it any other way.

[jamesrxx951]

on a similar set up that i had i used a 2300 mah nimh pack. then i swiched to a 1100 mah a123 and got more flight time. also the 5645's i have heard that they are pretty slow for freestyle 3d. like rolling manuverse. i have put perry pumps on all my saitos and have had definate increases in power. i have gone through alot of headache to figure that out but they make a huge difference.

[ALANXP]

today I mounted the engine and the shaft in pointing down(down thurst) i use a 90 deg ruler .Should I set it up thrust by adding washers ?how many deg ?

[octanehuffer]

Proper thrust is stablished in the firewall already. Why change it? Assemble per instructions.

[jamesrxx951]

fly it first and make sure that the thrust is already ok. if there is need to change thrust then do so.

[ALANXP]

	Quote: Originally Posted by octanehuffer
	Proper thrust is stablished in the firewall already. Why change it? Assemble per instructions.

as far as i know a freestlye model needs ups thurst not down thrust :S i think there was about 3 deg of down thrust and i added wahers and now i got about 2~3deg of up thrust.

alan

[Reza]

alan,

Quique's planes have 0 up/down thrust! I totally agree with octane!

All of QQ yak have about 2.5 right thrust built-in the firewall!
You need to keep in mind, who was behind the design of these planes and trust the manual.
There is always room for improvement but certain things are not considered improving can make a very good flying plane not fly as good at all!

Cheers,
Reza