170cc engine enough power for SD 40% Yak?

[SMOKEY]

I was wondering if a 170cc was a good engine for a SD 40% yak? I will be mainly be doing 3D stuff. I am at sea level. Should i really go with a 210cc for great performance?

Thanks
Smokey

[bodywerks]

Sure. the 150 has been pulling them around this whole time. The 170 will just be better - especially on pipes!

[AHP]

A buddy of mine has one with a ZDZ 210 spinning a 34x14 on standard mufflers. I've put several flights on it and it has incredible power for the size of plane. The 210 was made for it, IMO. Loaded full of fuel and smoke it is ballistic out of a hover. Unless you already have the 170, I wouldn't even consider it for this airframe. It's a massive, draggy airframe. I've seen them with 150's and pipes and they are slugs. There is also a review of one on the U. with a DA150 and pipes and it struggles to pull out of a hover.

[SMOKEY]

AHP...Do you know how much the plane weighed with the 210? I was thinking using a 170 and keeping the plane lite. Carbon fiber everything and no smoke. I do not have the engine or plane yet. Just considering what my options will be when i am ready to purchase.

Smokey

[AHP]

I don't remember the exact figure, but it was either 52 or 54lbs, IIRC. The 210 is less than 2lbs heavier than the 170. The 210 is also onsale for $1725. If you've never seen the yak in person, they are HUGE. It dwarfs my 40% Cardens. I would take a stock-weight ZDZ 210-powered one all day over a lighter one with a 170. I would also highly recommend a Seiko on the rudder with a 3cell.

It's an awesome plane for 3D. It, in my opinion, is the only plane that dethrones the Carden 40% Edge as the king of 3D. That is, if you have enough power.

[FLYNYAK]

I have one with the new 3W 170. It is 50 lbs dry, and will pull out of a hover nicley but not ballistic. It is a big 3D monster great for SLOW 3D . BUT I think I would rather have a Wild Hare 41% with a DA 150 for less money. You cant fly verry fast or you will get flutter. The stock landing gear is week junk. Plastic canopy cracks if a fly farts on it . It is fun but I will start saving for a Extra 300.

[AHP]

Yeah, definitely keep a towel over the canopy on hot days. It's paper thin and will warp. Never had a problem with it cracking. As far as flutter.. You shouldn't have a problem with good servos, linkages, setup and plenty of battery power. I've flown my buddy's wide open rippin' the snot out of the 34x14 and it will get a little rudder wag, but no flutter. He has 4 5955's on the rudder and it isn't enough. That's why I recommend the Seiko on 11-12v. The gear is fine but the wheel pants are crap.

[FLYNYAK]

I have all 8611As and Seiko 3cell on rudder. I have not had flutter but have ben worned by meny about it. I think TBM has a right up on this beast. I love Yaks and this is my forth one. I have a few picks of my SD Yak with my friends 40% Carden 300.

[torquen]

I have flown the heck out of these planes with the 150 3w's and they fly very well. It has power to pull through all 3d stuff just not 35% fast. I would opt for the 3w 170.
Flynyak, I have not heard one case of flutter on the 40% yak. If one did flutter then the setup was wrong. I have flown this plane full power coming out of a dive and never showed a sign of flutter. It could flutter if you only had one servo per elevator or 2 per aileron but that is not the proper setup.
Garrett

[SMOKEY]

Wow!...The SD yak is HUGE compared to the Carden. I always like planes that stand out.

Smokey

[flying skunks]

A couple of weekend's ago we had a Carden Yak(37.5%),an Aerotech Yak(42%),and my 37.5% SD.The Aerotech was larger than all and weighed 42lbs,the Carden was the smallest at 40lbs ,the SD was the longest and weighed in at 40lbs 6oz with smoke and pipes.The Carden was the smallest of the bunch(not much larger than a 35%er
Donnie

[Edge 540]

Humm....normal variations sure, but why are these planes 10lbs lighter than the others in this thread? Seems strange.

[gdavisjr69]

Donnie was giving weights for the 37.5% SD Models Yak, not their bigger 40% Yak. That's why there is a variation.

[FLYNYAK]

Comp ARF has a bigger 3.3 version 133'' wing span and is only about 45lbs if you want the Monster of all YAKs

[bodywerks]

	Quote: Originally Posted by Edge 540
	Humm....normal variations sure, but why are these planes 10lbs lighter than the others in this thread? Seems strange.

No, he was talking about the 37.5% SD.