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Gasser Model RC Helicopters > Zenoah Carb Not Pumping Part Two
 
 
Fixit
Elite Veteran
Location: UK

My Posts This: Topic  Forum		Well my last thread was closed before I had chance to update it so I've had to open another.

Success
Well I have to say fitting the new Teflon gasket come heat shield seems to have worked but I’m still wondering if it’s the actual shield or just the gasket so to prove this I’m going to make a new gasket only and try it, either way I’m pleased the problem is sorted and I can get back to flying but there’s always something crops up in this hobby and just as I sorted the fuel problem the tail servo started playing up so I need to replace that as well.

I only like to fly gassed up
05-02-2009 07:40 PM
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carpman
Senior Heliman
Location: Spain

My Posts This: Topic  Forum		Your right about it been never ending...!

...but that's what I like about this hobby always bits and bobs to do and sort out

Wonder why the topic was closed, maybe cos it got invaded by that **** bloke

KEVIN
Trex 600NSP | Trex 700 | MA Spectra G
05-02-2009 08:16 PM
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jrockstuart
Elite Veteran
Location: Allen, Texas

My Posts This: Topic  Forum		Wherever the **** goes, the thread gets closed.

MinAir Spectra-G
Trex 450Pro V-bar /Scorpion /JR
Wally Motors/New England Heli/DL Canopies
05-05-2009 09:00 PM
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Fixit
Elite Veteran
Location: UK

My Posts This: Topic  Forum		Yes and I would like to keep them open so lets be careful for the time being chaps.

Gheers
fixit

I only like to fly gassed up
05-05-2009 09:15 PM
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jrockstuart
Elite Veteran
Location: Allen, Texas

My Posts This: Topic  Forum		Did you make the gasket/heat shield out of a piece of a larger piece of teflon?

MinAir Spectra-G
Trex 450Pro V-bar /Scorpion /JR
Wally Motors/New England Heli/DL Canopies
05-05-2009 09:19 PM
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TaleGunner
Elite Veteran
Location: Deer Park WA

My Posts This: Topic  Forum		I'm glad that the carb shield thing worked for you. If you recall I fought that issue with mine for over a month. On the stock setup I covered the hole in the fan shield.
After the fan mod I used the stock shield with the Teflon on one side and stock gasket on the other. along with the new wally fan and all seems fine. I put over 12 flights on her at a fun-fly this weekend and my only issue was my V4 tried to fall off once. I think I'm going to weld that dang thing on

CRASH! GLUE! REPEAT!
05-05-2009 09:32 PM
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Fixit
Elite Veteran
Location: UK

My Posts This: Topic  Forum
Quote 
Did you make the gasket/heat shield out of a piece of a larger piece of teflon?
Yes about 3 1/2" x 2" have a look at the pictures I put up.



I only like to fly gassed up
05-05-2009 09:38 PM
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Fixit
Elite Veteran
Location: UK

My Posts This: Topic  Forum		Hi TailGunner

I'm pleased you went through it otherwise I might have been struggling.
Cheers

I only like to fly gassed up
05-05-2009 09:40 PM
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Fixit
Elite Veteran
Location: UK

My Posts This: Topic  Forum		One flight Wonder

The 700G is becoming a one flight only Heli with the Zenoah carb, it flew perfect yesterday for a few minutes but then it started pulsing and I had to land it, a quick look established the RZ block needed nipping up again after only just fitting a new gasket but after one more flight it was pulsing again and then after the third flight the carb wouldn’t pump fuel and the priming bulb wouldn’t work so I packed up and came home early and when I got home the carb was cold and the bulb worked fine
I've gone back too the stock insulator block with paper gaskets and extended the shroud in hope it will direct the heat down and away from the carb and if this doesn’t work I'm stumped.
The previous extended Teflon gasket I made didn’t help after all.



I only like to fly gassed up
11-01-2009 03:48 PM
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TaleGunnerElite Veteran - Location: Deer Park WA - My Posts This: Topic  Forum
fixit
try this and redirect the air the passes the gap + use the heat shield



CRASH! GLUE! REPEAT!
11-01-2009 04:35 PM
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Fixit
Elite Veteran
Location: UK

My Posts This: Topic  Forum
Quote 
fixit
try this and redirect the air the passes the gap + use the heat shield

Basically I've done the same only I just glued the plastic bit on instead of riveting it, the heat shield didn’t seem to work but I suppose using it with the extra plate might help.
Cheers

I only like to fly gassed up
11-01-2009 05:43 PM
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TaleGunner
Elite Veteran
Location: Deer Park WA

My Posts This: Topic  Forum		I tried gluing it but the fuel caused it to fall off after awhile.
for me it took both the fan shield cover and the carb shield to get it to work right. I then put one of Wally's fans on and don't need ether.

CRASH! GLUE! REPEAT!
11-01-2009 06:30 PM
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Fixit
Elite Veteran
Location: UK

My Posts This: Topic  Forum		Well I can’t possibly run to buying another fan so I will try using both before I shelve it.

I only like to fly gassed up
11-01-2009 08:04 PM
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smallplanes
Key Veteran
Location: Timmonsville,S.C. ,USA

My Posts This: Topic  Forum		What if you made the whole carb mounting block out of a thick piece of
G10? I know aluminum will transfer heat a lot. Thats probbaly why Zenoah used plastic mount.

Spectra G 26cc
Jewel
2 Evo 50's
3 Trex 450's
Trex 700
Raptor50
12Z
11-02-2009 05:31 PM
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Fixit
Elite Veteran
Location: UK

My Posts This: Topic  Forum		That might be worth trying if I could get hold of G10, lets see how it works with the plastic block first.

I only like to fly gassed up
11-02-2009 06:02 PM
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smallplanes
Key Veteran
Location: Timmonsville,S.C. ,USA

My Posts This: Topic  Forum		I made a few carb mounting blocks out of G10 for a Poulan chainsaw engine for a airplane and it worked great,i have never had a problem. The G10 also makes good strong threads if it's thick enuff.

Spectra G 26cc
Jewel
2 Evo 50's
3 Trex 450's
Trex 700
Raptor50
12Z
11-03-2009 05:43 PM
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Fixit
Elite Veteran
Location: UK

My Posts This: Topic  Forum		Do you think this is the same as G10?
http://www.directplasticsonline.co.uk/TufnolSheet/

I only like to fly gassed up
11-04-2009 06:04 PM
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JuanRodriguez
Elite Veteran
Location: Rochester, New York

My Posts This: Topic  Forum		Doesn't look like it.........

G-10 looks very similar to the carbon fiber frames you're used to seeing...... only instead of "carbon fiber" cloth, it's make from fiberglass cloth.

Here is a site that tells you how to make your own....

http://www.mnbigbirds.com/FIberglass%20Lay-up.htm
11-04-2009 09:33 PM
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Fixit
Elite Veteran
Location: UK

My Posts This: Topic  Forum		Thanks for the link it was interesting to watch but I could see myself getting into an awful mess trying to make my own so I will carry on the search for the correct material in the UK

I only like to fly gassed up
11-04-2009 10:10 PM
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smallplanes
Key Veteran
Location: Timmonsville,S.C. ,USA

My Posts This: Topic  Forum		The G10 i have is green and it looks kinda like fiberglass and carbon fiber. I made mine on a cnc but i have seen people make them with a dremel tool and a steady hand. They put the dremel in a holder that held the tool kinda like a drill press and just pushed it by hand. Hey sometimes you have to use what you got.

Spectra G 26cc
Jewel
2 Evo 50's
3 Trex 450's
Trex 700
Raptor50
12Z
11-05-2009 10:31 PM
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Gasser Model RC Helicopters > Zenoah Carb Not Pumping Part Two
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