gen II yak -Cooling - help - Rezagh  
View related threads: (in this forum | in all forums)

Tower Hobbies
Enter up to 4 keywords or Tower stock numbers
Logged in as Guest



Users viewing this topic: none
  Printable Version
       

All Forums >> RC Airplanes >> Giant Scale Aircraft - 3D & Aerobatic >> Quique's Aircraft Support >> gen II yak -Cooling - help - Rezagh
Page: [1]

Login
Message << Older Topic   Newer Topic >>
gen II yak -Cooling - help - Rezagh - 8/13/2007 6:14:46 AM   
meanrudder


 

Posts: 58
Joined: 7/15/2002
From: chesterland, OH, USA
Status: offline 		Hi ,
I am putting a DA 100 w/ stock mufflers on my yak genII. It is on a new fuse.
Anyway, do I have to baffel the engine top and bottom of the cylinders? just top?
How much of the bottom of the cowl did you cut up?
any pictures?
Do I have to open the cannister area to increase the airflow to cool the engine?

Jim

< Message edited by meanrudder -- 8/21/2007 11:04:12 PM >
       Post #: 1

RE: gen II yak - - help - Rezagh - 8/14/2007 4:51:34 AM   
Rezagh


 

Posts: 1828
Joined: 6/10/2004
From: Rancho Santa Margarita, CA, USA
Status: offline 		Hi Jim,

Check this thread out on our forum http://www.rcuniverse.com/forum/m_4809120/anchors_4809953/mpage_1/key_baffle/anchor/tm.htm#4809953
You don't need to open the bottom of the fuse as if you were to use cans.

Hope this helps,
Reza

_____________________________

Quique's Aircraft Company

(in reply to meanrudder)
       Post #: 2

RE: gen II yak - - help - Rezagh - 8/14/2007 5:10:23 AM   
meanrudder


 

Posts: 58
Joined: 7/15/2002
From: chesterland, OH, USA
Status: offline 		Hi Rezagh,
How is this configuration for the top of the motor?
I will raise the lower baffelle to half way up the motor.
Did you cut alot of the bottom of the cowl or estimate 2.5 times and cut that much??

Thank you for your help.

Jim
This is in the original fuse.
I am installing a DA 100 in the new fuse.

Attachments
Click to see fullsize image.
Click for fullsize


< Message edited by meanrudder -- 8/14/2007 5:11:08 AM >

(in reply to Rezagh)
       Post #: 3

RE: gen II yak - - help - Rezagh - 8/14/2007 5:45:42 AM   
Rezagh


 

Posts: 1828
Joined: 6/10/2004
From: Rancho Santa Margarita, CA, USA
Status: offline 		WOW! Jim this seems to be alot of work. Good job! Howmuch weight have you added?

I would say the opening 1to2 should suffice but bigger the better ofcourse!
I did not cut a lot of the bottom but I did open the square pan.

For a DA100 you are more than good!

Try not to add much weight because you are right at the nose and might have a hard time balancing.

Good job. Please post some pictures of the completed baffling and couple of words how you did it in that thread for others to see.

Regards,
Reza

_____________________________

Quique's Aircraft Company

(in reply to meanrudder)
       Post #: 4

RE: gen II yak - - help - Rezagh - 8/21/2007 9:21:41 AM   
meanrudder


 

Posts: 58
Joined: 7/15/2002
From: chesterland, OH, USA
Status: offline 		The materials used are 1/8" light ply for top plate. 1/64" aircraft ply for curved ducting. For the bottom plate I am thinking 1/64th" with 3/4 oz fiberglass cloth. I do not believe much weight was added. I have a motor mount machined for me but you can run the top plate off the top of the engine box. I do not have a scale at the house at the moment.

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


< Message edited by meanrudder -- 8/21/2007 9:37:05 AM >

(in reply to Rezagh)
       Post #: 5

RE: gen II yak - - help - Rezagh - 8/21/2007 9:29:17 AM   
meanrudder


 

Posts: 58
Joined: 7/15/2002
From: chesterland, OH, USA
Status: offline 		Now here is the question of the hour. I can attach a plate to the muffler with silicon and that would match the cutout of the cowl so the whole cylinder is exposed to the opening of the cowl. Do you think this will provide sufficient cooling? Should I block more of the cowl opening?
I also cut the front of the cowl just in-line with the spark plugs to allow air to cool the top of the cylinders
For the bottom plate I cut out the muffler slot and silicon the wood in place. I use some cloth to stiffen the ply.


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


< Message edited by meanrudder -- 8/21/2007 9:38:32 AM >

(in reply to meanrudder)
       Post #: 6

RE: gen II yak - - help - Rezagh - 8/21/2007 9:36:30 AM   
meanrudder


 

Posts: 58
Joined: 7/15/2002
From: chesterland, OH, USA
Status: offline 		Here is my choke setup. I only use some red nyrod, a piece of wood for the support, one screw 2-56 to use as a knob and Sullivan quick link for 2-56 threaded rod. This allows you to bring out the choke anywhere on the plane and the person holding the plane can operate the choke. It is a lot lighter than a servo. I used a little glue where the nyrod went through the fuse.

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


< Message edited by meanrudder -- 8/21/2007 11:05:04 PM >

(in reply to meanrudder)
       Post #: 7

RE: gen II yak - - help - Rezagh - 8/21/2007 9:39:12 AM   
meanrudder


 

Posts: 58
Joined: 7/15/2002
From: chesterland, OH, USA
Status: offline 		Do not be afraid to be critical. Jim

(in reply to meanrudder)
       Post #: 8

RE: gen II yak - - help - Rezagh - 8/22/2007 1:15:32 AM   
flyrcmikeb


 

Posts: 12
Joined: 9/18/2004
From: hendersonville, TN, USA
Status: offline 		Be careful about asking for critical..

Looking good jim, this should get you noticed!

I may want you to do my yak if i ever uuuuhhhhh ok.


(in reply to meanrudder)
       Post #: 9

RE: gen II yak -Cooling - help - Rezagh - 8/22/2007 1:34:42 AM   
Bashedit


 

Posts: 115
Joined: 1/24/2004
From: Newnan, GA, USA
Status: offline 		Jim,
How about spending a little more time sanding those parts! Geez, some people might actually look at this thread! The Quad State Crew doesn't want any bad raps here!

How about a picture with the cowl on from the front so we can see where in the slot the engine sits, may help determine if the lower baffle is required. Besides thats a DA not a BME that requires a lot of cooling.

Mike? Jim S? Mike Jr ?

Ed

(in reply to flyrcmikeb)
       Post #: 10

RE: gen II yak -Cooling - help - Rezagh - 8/22/2007 2:36:46 AM   
Rezagh


 

Posts: 1828
Joined: 6/10/2004
From: Rancho Santa Margarita, CA, USA
Status: offline 		Great Job Man! Looks really awesome. Is there anyway you can have a little more space on the bottom baffle. It's really over kill for DA. I am running some live testing and in flight information on engine temp. I will give you guys more details hopefully this weekend.

I have been doing it on a 3W 212 4 cylinder that is for a friend of mine but will do it on my DA100 this weekend if I get a chance.

I can tell you that his rear cylinders were running 100 degrees hotter without baffling, say 330-350F without and 230-240F with so I know how effective baffling can be and yours should kick ...!

Regards,
Reza

_____________________________

Quique's Aircraft Company

(in reply to Bashedit)
       Post #: 11

RE: gen II yak -Cooling - help - Rezagh - 8/22/2007 3:38:17 AM   
flatlandmike



Posts: 1164
Joined: 10/6/2003
From: lexington, KY, USA
Status: offline 		It does look sweet Ill let you do my plane now.

_____________________________

www.jerseymodeler.com
Special thanx to The Crew Mike B. Jim Z. Ed J. Jim S.

(in reply to Rezagh)
       Post #: 12

RE: gen II yak -Cooling - help - Rezagh - 8/23/2007 10:36:52 PM   
Jim Simer


 

Posts: 22
Joined: 11/12/2002
From: Concord, OH, USA
Status: offline 		Boy, I really love the choke set up, too bad I don't get any rollaties from that, exspecialy after losing an air frame.

The CREW

_____________________________

Fly until there's no more fuel

(in reply to flatlandmike)
       Post #: 13

RE: gen II yak -Cooling - help - Rezagh - 8/23/2007 10:38:46 PM   
Jim Simer


 

Posts: 22
Joined: 11/12/2002
From: Concord, OH, USA
Status: offline 		Yea, I thought the master taught you how to sand, I guess after losing a very nice plane ( Lots of sanding ) it just was not worth your time anymore

_____________________________

Fly until there's no more fuel

(in reply to Jim Simer)
       Post #: 14

RE: gen II yak -Cooling - help - Rezagh - 8/24/2007 9:34:33 PM   
flatlandmike



Posts: 1164
Joined: 10/6/2003
From: lexington, KY, USA
Status: offline 		He will sand it when he sure he doesnt crash it LoL So he will prob fly it 10 to 20 times then decide to pretty it up... sand things and add the better graphics maybe a new landing gear then the very next flight BAMMO out jumps the High tention wire tower.

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


< Message edited by flatlandmike -- 8/24/2007 9:36:43 PM >

_____________________________

www.jerseymodeler.com
Special thanx to The Crew Mike B. Jim Z. Ed J. Jim S.

(in reply to Jim Simer)
       Post #: 15

RE: gen II yak -Cooling - help - Rezagh - 8/24/2007 9:37:13 PM   
flatlandmike