Go Back  RCU Forums > RC Airplanes > Beginners
Reload this Page >

Fueling a Cowled Engine

Notices
Beginners Beginners in RC start here for help.

Fueling a Cowled Engine

Old 04-05-2012, 05:10 AM
  #1  
KW_Counter
Senior Member
Thread Starter
 
Join Date: Feb 2003
Location: Lake County, CA
Posts: 1,555
Likes: 0
Received 0 Likes on 0 Posts
Default Fueling a Cowled Engine

Good Morning,

I'm working on my first cowled engine, a BH T-28 with a 61 FX.
I am using a 3 fuel line system with a fuel dot.
How do I know when the tank is full?
I hope I don't have to wait until it runs out the muffler.
It is a Pitts style muffler in case it matters.

Thanks,
KW_Counter

Old 04-05-2012, 05:13 AM
  #2  
MajorTomski
 
MajorTomski's Avatar
 
Join Date: Apr 2003
Location: Oklahoma City, OK
Posts: 2,536
Likes: 0
Received 0 Likes on 0 Posts
Default RE: Fueling a Cowled Engine

At the present time, yep, wait till it runs out the muffler. If you use a hand crank pump you can count the cranks to a just-less-than-full tank and always only add that much fuel.
Old 04-05-2012, 05:15 AM
  #3  
MinnFlyer
Senior Member
My Feedback: (4)
 
MinnFlyer's Avatar
 
Join Date: Apr 2002
Location: Willmar, MN
Posts: 28,519
Likes: 0
Received 5 Likes on 5 Posts
Default RE: Fueling a Cowled Engine

Ditto
Old 04-05-2012, 05:35 AM
  #4  
KW_Counter
Senior Member
Thread Starter
 
Join Date: Feb 2003
Location: Lake County, CA
Posts: 1,555
Likes: 0
Received 0 Likes on 0 Posts
Default RE: Fueling a Cowled Engine

I'm a Scottish Accountant and old hippie.
At $20 bucks a gallon for fuel that ain't the answer I wanted.

I've also been married 21 years, since when do I get what I want?

Thanks,
KW_Counter
Old 04-05-2012, 05:46 AM
  #5  
Admiral052
Senior Member
 
Join Date: Jul 2011
Location: Elgin, IL
Posts: 150
Likes: 0
Received 0 Likes on 0 Posts
Default RE: Fueling a Cowled Engine

Well this explains why I always see fuel soaked into our tables on the flight line. I always wondered why but never asked.
Old 04-05-2012, 06:08 AM
  #6  
landeck
Senior Member
My Feedback: (1)
 
Join Date: Nov 2007
Location: Sandy Springs, GA GA
Posts: 1,710
Likes: 0
Received 1 Like on 1 Post
Default RE: Fueling a Cowled Engine

I use a small wide mouth jar placed under the exhaust tubes to catch the overflow. Keeps the table dry.

Bruce
Old 04-05-2012, 06:26 AM
  #7  
koastrc
Senior Member
 
koastrc's Avatar
 
Join Date: May 2009
Location: BILOXI Mississippi
Posts: 283
Likes: 0
Received 0 Likes on 0 Posts
Default RE: Fueling a Cowled Engine

Like the Major pointed out, I count the cranks. However there is another rig I have seen. It was one of those quick fills. You know the kind. Plug in the special thing and fill the tank. Dude had one of those on the under side of the cowl. Wait, he also had a fuel dot. Wanted to tell him those quick fills are at times trouble. He sticks a line in the quick fill that is attached to a small tank. He uses the fuel dot to fill the plane. Soon the fuel ran into the small tank from the quick fill. I figure he had the quick connector on the exhaust pressure line. It appeared to work. Glad I kept my mouth shut about the quick connector.
Old 04-05-2012, 08:51 AM
  #8  
opjose
 
opjose's Avatar
 
Join Date: Nov 2005
Location: Poolesville, MD
Posts: 12,605
Likes: 0
Received 0 Likes on 0 Posts
Default RE: Fueling a Cowled Engine

If you don't want to spill the fuel, connect a return line to the muffler pressure line ( disconnect it at the muffler ), and just keep pumping until you see fuel coming back up the return line.



BTW: I'll bet our field tables would make excellent kindling, with all of the different types of fuel that has soaked into the wood.

Old 04-05-2012, 11:43 AM
  #9  
MinnFlyer
Senior Member
My Feedback: (4)
 
MinnFlyer's Avatar
 
Join Date: Apr 2002
Location: Willmar, MN
Posts: 28,519
Likes: 0
Received 5 Likes on 5 Posts
Default RE: Fueling a Cowled Engine

Counting the cranks is a good way to avoid spilling too much. Let's say that on an empty tank it takes 100 cranks. Then you know that when you hit 95 or so, you'll want to slow down. You could stop at 95, bit I like to be sure the pump is still working (you know how those things can slowly go bad)

Then after each flight, count again. You'll usually find that you use about the same amount of fuel each time. So maybe, after each flight, you'll need to slow down at around 50 cranks.

Yea, you'll still spill a little, but as long as you're going slow, it won't come out too fast.
Old 04-05-2012, 12:36 PM
  #10  
acdii
 
Join Date: Jan 2011
Location: Capron, IL
Posts: 9,119
Received 24 Likes on 22 Posts
Default RE: Fueling a Cowled Engine

What you can do is loop the pressure line through the cowl so you can see it, doesn't matter where, just as long as you can see a small part of it, then just keep your eye on it when filling, when you see bubbles or fuel, stop.
Old 04-05-2012, 12:59 PM
  #11  
KW_Counter
Senior Member
Thread Starter
 
Join Date: Feb 2003
Location: Lake County, CA
Posts: 1,555
Likes: 0
Received 0 Likes on 0 Posts
Default RE: Fueling a Cowled Engine

acdii,

I like that idea! I'll see if it will work on my plane.

opjose,

You missed the part about it being a cowled engine.
Normally I run the pressure tube into a retired fuel tank for retrieval.

Thanks All,
KW_Counter
Old 04-05-2012, 01:17 PM
  #12  
opjose
 
opjose's Avatar
 
Join Date: Nov 2005
Location: Poolesville, MD
Posts: 12,605
Likes: 0
Received 0 Likes on 0 Posts
Default RE: Fueling a Cowled Engine


ORIGINAL: KW_Counter

opjose,

You missed the part about it being a cowled engine.
Normally I run the pressure tube into a retired fuel tank for retrieval.

Thanks All,
KW_Counter
I sure did!

ACDII's idea is pretty good.

The line doesn't have to run outside the cowl at all.

A more complicated approach is to put a secondary fueler on the pressure line rigged so that excess fuel flows out when you have the fitting in place.


Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off


Thread Tools
Search this Thread

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

Copyright 2018 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.