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Cox Engine of The Month
TD .09 fuel draw.
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TD .09 fuel draw.
I am considering a Jr. Ringmaster build in the future and I was wondering how well the TD .09 will draw fuel from a standard vent CL tank setup.
I know the TD .049 has fuel draw issues, but I am not sure if the TD .09 is the same. I would prefer not to use pressure.
If anyone has used a TD .09 on a CL plane I would be happy to hear from you.
Ron
I know the TD .049 has fuel draw issues, but I am not sure if the TD .09 is the same. I would prefer not to use pressure.
If anyone has used a TD .09 on a CL plane I would be happy to hear from you.
Ron
Cribbs74- Moderator
-
Posts : 11895
Join date : 2011-10-24
Age : 50
Location : Tuttle, OK
Re: TD .09 fuel draw.
What type of fuel draw issues does a Tee Dee .049 have? Andy
anm2- Gold Member
- Posts : 292
Join date : 2013-03-30
Re: TD .09 fuel draw.
Well, It doesn't draw well... not sure how to explain it, but I imagine because of the venturi size it doesn't create much vacuum therfore it has a hard time drawing fuel to the spray bar.
This is why a lot of folks (myself included) will use bladder pressure when running A TD. With regular metal style tanks the lack of draw becomes apparent during hard cornering.
Hope that helps a little. It would be easier to show you in flight than explain it. Maybe someone else can explain it better.
Ron
This is why a lot of folks (myself included) will use bladder pressure when running A TD. With regular metal style tanks the lack of draw becomes apparent during hard cornering.
Hope that helps a little. It would be easier to show you in flight than explain it. Maybe someone else can explain it better.
Ron
Cribbs74- Moderator
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Posts : 11895
Join date : 2011-10-24
Age : 50
Location : Tuttle, OK
Re: TD .09 fuel draw.
I always use atmospheric ballon tanks with TeeDees and never experienved fuel draw problem as long as the fuel line was fit to the carburetor nipple air-tight, and the needle valve was also sealed with a piece of silicone fuul tube drawn overw the threaded nipple of the carburettor that holds the needle valve...Cribbs74 wrote:Well, It doesn't draw well... not sure how to explain it, but I imagine because of the venturi size it doesn't create much vacuum therfore it has a hard time drawing fuel to the spray bar.
This is why a lot of folks (myself included) will use bladder pressure when running A TD. With regular metal style tanks the lack of draw becomes apparent during hard cornering.
Hope that helps a little. It would be easier to show you in flight than explain it. Maybe someone else can explain it better.
Ron
balogh- Top Poster
-
Posts : 4748
Join date : 2011-11-06
Age : 65
Location : Budapest Hungary
Re: TD .09 fuel draw.
It's a thought. I really enjoy the fill, flip and fly you get with a fixed hard tank though. I guess when the time comes I'll just see what works best.
Cribbs74- Moderator
-
Posts : 11895
Join date : 2011-10-24
Age : 50
Location : Tuttle, OK
Re: TD .09 fuel draw.
I suspect the SPI has an impact on fuel draw as well.
tubebass- Silver Member
- Posts : 75
Join date : 2011-08-11
Age : 70
Location : Saint John, N.B, Canada
Re: TD .09 fuel draw.
You could always try a an R/C type 'silencer' Ron they have a pressure nipple on them.
I had no probs with the 09 r/c in my Old Timer even inverted it just worked.
I had no probs with the 09 r/c in my Old Timer even inverted it just worked.
John Goddard- Diamond Member
- Posts : 2447
Join date : 2011-11-24
Age : 59
Location : Leyton North East London
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