102" Yak/DA-85  
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All Forums >> RC Airplanes >> Giant Scale Aircraft - 3D & Aerobatic >> Quique's Aircraft Support >> 102" Yak/DA-85
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102" Yak/DA-85 - 12/15/2007 1:45:01 AM   
eraser


 

Posts: 216
Joined: 7/27/2004
From: lochbuie, CO, USA
Status: offline 		Just thought I would let every Yak lover out there know that I just completed the 102" with a DA-85 and the Jtec large volumn muffler. I was concerned about balance.With the muffler way up front and 2 reciever, 5 cell 1700 ni-cads, and 1 1700 4 cell ignition battery mounted in the engine box, it balanced right on the money. I also only used 1 rudder servo to minimize weight behind the wing tube.
The fuselage and stabs are Gen 2, and the wings are Gen 1.
Total dry weight is 24lb. 6 oz.
Hopefully it will have enough power, but I have yet to test fly it do to snow and extreme cold.
       Post #: 1

RE: 102" Yak/DA-85 - 12/15/2007 3:49:06 PM   
krayzc-RCU



Posts: 5971
Joined: 3/26/2002
From: Kannapolis, NC, USA
Status: offline 		kewl and that DA-85 is a beast....

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smooth as silk!

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RE: 102" Yak/DA-85 - 12/15/2007 11:53:15 PM   
eraser


 

Posts: 216
Joined: 7/27/2004
From: lochbuie, CO, USA
Status: offline 		Well, I braved the cold and snow and flew the maiden today.
Fired up the DA-85 for the first time and I could not believe how smooth it was. I was shocked, it seemed as smooth as my DA-100. After a little tweeking of the needles, I took off over a snow covered runway (yeah I'm nuts).

Power seemed to be pretty close to the DA-100, but I didn't push it on the first flight. I was skepticle at first, but I think this is going to be a good combination after the motor gets broken in.

(in reply to krayzc-RCU)
       Post #: 3

RE: 102" Yak/DA-85 - 12/16/2007 1:55:51 AM   
krayzc-RCU



Posts: 5971
Joined: 3/26/2002
From: Kannapolis, NC, USA
Status: offline 		eraser
u r seeing what we/u that actually have the 85 the real deal and the net is still saying:

its could not be as smooth as a twin
its could not be as powerful as the 100
it could not be XXXX

what a joke those guys......

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smooth as silk!

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RE: 102" Yak/DA-85 - 12/16/2007 1:56:12 PM   
pelone



Posts: 39
Joined: 3/3/2002
From: Europe, LUXEMBOURG
Status: offline 		Well,

that are really good news!

I recieved a part of my new Gen3 on friday, the rest must be there tomorrow ( there was a transport mistake)....

I'm still not decided between the DA 85 and the 3W 85XI CS, but i has time because i have exams to prepare

Would it be possible to get a few pics of the engine/muffler installation? Did you encounter any problems installing the powerplant?

Thanks,

David

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David

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RE: 102" Yak/DA-85 - 12/17/2007 2:28:23 AM   
eraser


 

Posts: 216
Joined: 7/27/2004
From: lochbuie, CO, USA
Status: offline 		David
I dont think you can go wrong with either motor. I know the DA-85 works great. A couple of picks.

Attachments
Click to see fullsize image.
Click for fullsize 		Click to see fullsize image.
Click for fullsize

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       Post #: 6

RE: 102" Yak/DA-85 - 12/17/2007 9:44:44 AM   
pelone



Posts: 39
Joined: 3/3/2002
From: Europe, LUXEMBOURG
Status: offline 		Thank you!

Wow you really maidened your plane in the snow

I can't use a pitt's muffler like you did because of the noise restrictions here, I will have to work out a solution for that because i have to use a muffler which has 80mm diameter or a pipe that would be very long...



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David

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RE: 102" Yak/DA-85 - 1/5/2008 7:46:59 PM   
Wildstyle



Posts: 106
Joined: 7/16/2003
From: Palmerston North, NEW ZEALAND
Status: offline 		Eraser, what does the Jtec muffler weigh?, or do you have a part number?. What servos did you use? I was thinking DA-85 w/mtw td75 can.
Anthony

(in reply to pelone)
       Post #: 8

RE: 102" Yak/DA-85 - 1/5/2008 8:21:24 PM   
Rezagh


 

Posts: 1810
Joined: 6/10/2004
From: Rancho Santa Margarita, CA, USA
Status: offline 		Good Job Eraser! Looking awesome in that snow :-) Any videos at all?

Thanks for sharing,
Reza

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Quique's Aircraft Company

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RE: 102" Yak/DA-85 - 1/6/2008 4:34:04 AM   
krayzc-RCU



Posts: 5971
Joined: 3/26/2002
From: Kannapolis, NC, USA
Status: offline 		i think my jtec was around 10 oz

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smooth as silk!

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       Post #: 10

RE: 102" Yak/DA-85 - 1/8/2008 2:20:32 PM   
pelone



Posts: 39
Joined: 3/3/2002
From: Europe, LUXEMBOURG
Status: offline 		Hello,

meanwhiel i received my Gen III Yak and the problem is that i can't figure out how to fit a proper muffler for a DA85 or a 3W85 in the muffler tunnel

Has anybody an idea ????

< Message edited by pelone -- 1/8/2008 2:21:39 PM >

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David

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