What engine for 73" yak  
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All Forums >> RC Airplanes >> Giant Scale Aircraft - 3D & Aerobatic >> Quique's Aircraft Support >> What engine for 73" yak
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What engine for 73" yak - 5/17/2008 1:40:35 PM   
sgoen


 

Posts: 50
Joined: 5/16/2005
From: South Bend, IN, USA
Status: offline 		I have a second version 73" Yak. Right now I have an OS 160 in it for power. It is a rocket in the air. I would like to slow it down. What would be a good engine to change to?
Gas?
Glow?
4 Stroke?
       Post #: 1

RE: What engine for 73" yak - 5/17/2008 2:28:18 PM   
styk


 

Posts: 109
Joined: 3/4/2004
From: Kirkcaldy,Scotland, UNITED KINGDOM
Status: offline

< Message edited by styk -- 5/17/2008 2:29:19 PM >

(in reply to sgoen)
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RE: What engine for 73" yak - 5/17/2008 3:57:48 PM   
onewasp


 

Posts: 1360
Joined: 12/11/2002
From: USA, USA
Status: offline 		I am NOT trying to offer a SA answer but if you cannot accomplish your goal with throttle then you could try a Saito 180 and prop it for its torque curve (that is where it should be run anyway)

It will still be overpowered but the torque characteristics make it more easily handled.
While I've not owned the 160 most two stroke glows come on their power band "right now"______while the Saito four stroke is much more "proportional" if you will.
The "right now" aspect makes throttling a bit touchy.


I've left out the YS choices as that is an entirely different animal. It is one that I found I didn't care for, even though displacement for displacement it easily puts out more power than any other.
The Saito is quite user friendly and very forgiving of bad set ups. That is something that the YS is far less tolerant of.
However if you are after max power output per engine displacement size there simply is no other choice in four strokes.

You can check the video on Quique's site as he flies that A/C with an Evolution 26 gasser and makes comments relating to the comparison to glow______I don't think you will want to go that way.
In conversations with Quique (no I am NOT close to him) he supports the Saito 180 for the 73" but calls it "rocket power" level.

< Message edited by onewasp -- 5/17/2008 4:01:24 PM >

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RE: What engine for 73" yak - 5/17/2008 8:07:33 PM   
randy racer


 

Posts: 1282
Joined: 4/7/2005
From: mayfield, KY, USA
Status: online 		the 160 is the best of the best on that plane. the left stick is what controls how fast it goes and also prop selection. i like a 18-6 Menz or a xoir. not trying to be smart but throttle control is key and you can never have to much power.

rr

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