Notices
Glow Engines Discuss RC glow engines

Welcome to Club SAITO !

Old 02-05-2022, 10:22 AM
  #52026  
Quikturn
My Feedback: (12)
 
Quikturn's Avatar
 
Join Date: Jan 2008
Location: West Des Moines, IA
Posts: 932
Received 6 Likes on 6 Posts
Default

Originally Posted by FlyerInOKC View Post
I got the same muffler with my G90 it is huge! I just missed a Pitts style a guy had for sale cheap.
You can turn the muffler 90 degrees, put a deflector on the end and run it like a pitts.
The following users liked this post:
Jesse Open (02-07-2022)
Old 02-05-2022, 12:38 PM
  #52027  
FlyerInOKC
My Feedback: (6)
 
FlyerInOKC's Avatar
 
Join Date: Nov 2004
Location: Oklahoma City, OK
Posts: 13,655
Received 167 Likes on 152 Posts
Default

Originally Posted by Quikturn View Post
You can turn the muffler 90 degrees, put a deflector on the end and run it like a pitts.
Won't fit the cowling.
Old 02-05-2022, 01:36 PM
  #52028  
Jesse Open
 
Jesse Open's Avatar
 
Join Date: Mar 2018
Location: 30 Miles North of Canada Border
Posts: 3,337
Received 62 Likes on 54 Posts
Default

Originally Posted by FlyerInOKC View Post
Won't fit the cowling.

Not many factory two stroke mufflers do???
Old 02-05-2022, 01:51 PM
  #52029  
Quikturn
My Feedback: (12)
 
Quikturn's Avatar
 
Join Date: Jan 2008
Location: West Des Moines, IA
Posts: 932
Received 6 Likes on 6 Posts
Default

Just cut a hole on one side of the cowl for the cylinder head and a hole on the other side for the muffler. 🤣
Old 02-05-2022, 02:23 PM
  #52030  
acdii
 
Join Date: Jan 2011
Location: Capron, IL
Posts: 9,978
Received 95 Likes on 86 Posts
Default

Cowl? We no need no stinkin cowl. LOL
Old 02-05-2022, 04:08 PM
  #52031  
Jesse Open
 
Jesse Open's Avatar
 
Join Date: Mar 2018
Location: 30 Miles North of Canada Border
Posts: 3,337
Received 62 Likes on 54 Posts
Default

Originally Posted by acdii View Post
Cowl? We no need no stinkin cowl. LOL
Beat me to it
Old 02-05-2022, 04:15 PM
  #52032  
FlyerInOKC
My Feedback: (6)
 
FlyerInOKC's Avatar
 
Join Date: Nov 2004
Location: Oklahoma City, OK
Posts: 13,655
Received 167 Likes on 152 Posts
Default

Originally Posted by acdii View Post
Cowl? We no need no stinkin cowl. LOL
You forgot the photo!



The following users liked this post:
Quikturn (02-05-2022)
Old 02-05-2022, 06:07 PM
  #52033  
Glowgeek
 
Join Date: Feb 2016
Posts: 3,215
Received 48 Likes on 48 Posts
Default

Originally Posted by Quikturn View Post
Just cut a hole on one side of the cowl for the cylinder head and a hole on the other side for the muffler. 🤣
Could be worse, could a Zenoah. Hole in the bottom for the head, hole in one side for the carb and another in the other side for the exhaust.
Old 02-05-2022, 06:33 PM
  #52034  
the Wasp
My Feedback: (1)
 
Join Date: Sep 2003
Location: VT
Posts: 5,201
Likes: 0
Received 37 Likes on 35 Posts
Default

Originally Posted by FlyerInOKC View Post


"we don't want no stinky 2st. give us a Saito!!!"
Old 02-06-2022, 04:53 AM
  #52035  
Hyjinx
 
Join Date: Dec 2015
Posts: 849
Received 22 Likes on 22 Posts
Default

Originally Posted by Glowgeek View Post
Could be worse, could a Zenoah. Hole in the bottom for the head, hole in one side for the carb and another in the other side for the exhaust.
And No Chinese Ignition. If there was a favorite gas two stroke. Ding ding ding they get the prize.
Cowls are ok if you don't have a round enough boat anchor. Singles have that "bb in a box car look. Lol
The following users liked this post:
Jesse Open (02-07-2022)
Old 02-06-2022, 05:55 AM
  #52036  
Quikturn
My Feedback: (12)
 
Quikturn's Avatar
 
Join Date: Jan 2008
Location: West Des Moines, IA
Posts: 932
Received 6 Likes on 6 Posts
Default

I really hate to cut into a nice looking cowl. They start looking more like bikinis than a cowl.

Another option is to use an inverted or upright (pitts?) muffler for those tight spaces. I used one on my Force One just to keep the model clean. They work well but boy are they loud.


Old 02-06-2022, 06:41 AM
  #52037  
FlyerInOKC
My Feedback: (6)
 
FlyerInOKC's Avatar
 
Join Date: Nov 2004
Location: Oklahoma City, OK
Posts: 13,655
Received 167 Likes on 152 Posts
Default

I like scale aircraft so I shoot to see as little of the engine as possible.
Old 02-06-2022, 07:12 AM
  #52038  
Glowgeek
 
Join Date: Feb 2016
Posts: 3,215
Received 48 Likes on 48 Posts
Default

Yeah me2, I opt for proper inlet baffling and air dams with smaller outlets vs hacking huge openings in cowls. I picked up a never flown giant scale CMpro Zero a while back for cheap. Had a Zenoah G40-something in it with monster cutouts in the cowl. The cowl really does look like bikini bottoms. Lol. I picked up DLE55RA For it and need to close off the cutouts on both sides of the round cowl. It's not going to be easy to make it look like it never happened.

I did look into Saitos for it but the cowl is too small to fit sufficiently sized twins or radials. This Zero will be my only 2-stroke powered warbird. I'm not terribly excited about that.
Old 02-06-2022, 07:58 AM
  #52039  
acdii
 
Join Date: Jan 2011
Location: Capron, IL
Posts: 9,978
Received 95 Likes on 86 Posts
Default

Can't get much better than this.





Old 02-06-2022, 08:22 AM
  #52040  
Quikturn
My Feedback: (12)
 
Quikturn's Avatar
 
Join Date: Jan 2008
Location: West Des Moines, IA
Posts: 932
Received 6 Likes on 6 Posts
Default

Wow! Nice job. I believe the rule is 2:1 or greater for outlet opening vs inlet opening.
Old 02-06-2022, 09:04 AM
  #52041  
acdii
 
Join Date: Jan 2011
Location: Capron, IL
Posts: 9,978
Received 95 Likes on 86 Posts
Default

I think I have enough. The inlet is basically through the fins and the outlets are nearly all around the back, should have plenty of exit air. Heres a better frontal view. All laser cut baffle.


The following users liked this post:
Jesse Open (02-07-2022)
Old 02-06-2022, 09:19 AM
  #52042  
FlyerInOKC
My Feedback: (6)
 
FlyerInOKC's Avatar
 
Join Date: Nov 2004
Location: Oklahoma City, OK
Posts: 13,655
Received 167 Likes on 152 Posts
Default

Looks great!
Old 02-06-2022, 09:27 AM
  #52043  
Quikturn
My Feedback: (12)
 
Quikturn's Avatar
 
Join Date: Jan 2008
Location: West Des Moines, IA
Posts: 932
Received 6 Likes on 6 Posts
Default

Have you run it yet with the cowl?

When I first flew the P-40 w/fa-65 I had overheating issues. I had to keep run time on the ground to a minimum. I closed off the bottom inlet and drilled more holes on the bottom of the cowl and it was better but still eventually overheated. Now I have a huge opening on the bottom so hopefully the fa-56 will run cool.

The following users liked this post:
Jesse Open (02-07-2022)
Old 02-06-2022, 02:42 PM
  #52044  
Glowgeek
 
Join Date: Feb 2016
Posts: 3,215
Received 48 Likes on 48 Posts
Default

Originally Posted by Quikturn View Post
Wow! Nice job. I believe the rule is 2:1 or greater for outlet opening vs inlet opening.
In my experience that's a myth. I've had 3x outlet and still overheated. It depends on the shape and size of the cowl, where the inlets/outlets are located, inlet baffled/unbaffled, outlet dammed/undammed, exhaust type and location and of course, fuel type.
Old 02-06-2022, 03:02 PM
  #52045  
Glowgeek
 
Join Date: Feb 2016
Posts: 3,215
Received 48 Likes on 48 Posts
Default

Originally Posted by Quikturn View Post
Have you run it yet with the cowl?

When I first flew the P-40 w/fa-65 I had overheating issues. I had to keep run time on the ground to a minimum. I closed off the bottom inlet and drilled more holes on the bottom of the cowl and it was better but still eventually overheated. Now I have a huge opening on the bottom so hopefully the fa-56 will run cool.
The outlet area on you P-40 has exit air dams, that's great, as long as the firewall doesn't block them from extracting hot air. Hard to see, but if your inlet openings don't have baffling directing cooler inlet air to ONLY your cylinder it is easy enough to fix. The 3mm/1/8" thick black sheets of "Craft Foam" they sell at dept stores works well and is CA safe.
Old 02-06-2022, 04:46 PM
  #52046  
Quikturn
My Feedback: (12)
 
Quikturn's Avatar
 
Join Date: Jan 2008
Location: West Des Moines, IA
Posts: 932
Received 6 Likes on 6 Posts
Default

I opened up the cowl flaps on the bottom and there is space between the firewall and cowl. However, no baffles. I should add some.
The following users liked this post:
Jesse Open (02-07-2022)
Old 02-06-2022, 04:52 PM
  #52047  
Glowgeek
 
Join Date: Feb 2016
Posts: 3,215
Received 48 Likes on 48 Posts
Default

Originally Posted by Quikturn View Post
I opened up the cowl flaps on the bottom and there is space between the firewall and cowl. However, no baffles. I should add some.
Once an inlet baffle is added your overheating issues will be a thing of the past. Using the craft foam make a 3 or 4 sided "tunnel" that directs air from the inlet openings directly to the cylinder. The cylinder only, because inlet air escaping to any other part of the engine is wasted.

Last edited by Glowgeek; 02-06-2022 at 05:22 PM.
The following users liked this post:
Quikturn (02-06-2022)
Old 02-06-2022, 08:08 PM
  #52048  
the Wasp
My Feedback: (1)
 
Join Date: Sep 2003
Location: VT
Posts: 5,201
Likes: 0
Received 37 Likes on 35 Posts
Default

hey, craft foam for air cooling baffles. never had that idea. will it melt or burn if it touches the engine fins??
Jim


Old 02-07-2022, 06:55 AM
  #52049  
Glowgeek
 
Join Date: Feb 2016
Posts: 3,215
Received 48 Likes on 48 Posts
Default

Originally Posted by the Wasp View Post
hey, craft foam for air cooling baffles. never had that idea. will it melt or burn if it touches the engine fins??
Jim
I've used it for gassers and glow and haven't had an issue with melting yet. I don't allow it to touch the fins, no need.

Last edited by Glowgeek; 02-07-2022 at 07:05 AM.
Old 02-07-2022, 07:28 AM
  #52050  
Jesse Open
 
Jesse Open's Avatar
 
Join Date: Mar 2018
Location: 30 Miles North of Canada Border
Posts: 3,337
Received 62 Likes on 54 Posts
Default

You can also skin it cleany with the thin, self adhesive aluminum foil tape.

Thread Tools
Search this Thread

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service - Do Not Sell or Share My Personal Information -

Copyright © 2023 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.