A aviation & planes forum. AviationBanter

If this is your first visit, be sure to check out the FAQ by clicking the link above. You may have to register before you can post: click the register link above to proceed. To start viewing messages, select the forum that you want to visit from the selection below.

Go Back   Home » AviationBanter forum » rec.aviation newsgroups » Aerobatics
Site Map Home Register Authors List Search Today's Posts Mark Forums Read Web Partners

unported flop tube



 
 
Thread Tools Display Modes
  #1  
Old May 31st 06, 11:07 PM posted to rec.aviation.aerobatics
external usenet poster
 
Posts: n/a
Default unported flop tube

A possible fix would be to keep the tube submerged at all times by,
making the tube mobile or attaching a float at its end to keep it
where it should,
another solution may be , and dont trust me here , test it first, to
make the tube double ended so one end would always be submerged.
a third solution may be to mount the end of the tube so that it
pivots and follows the fuel all this time being submerged.

This you will have to engineer yourself.

Ads
  #2  
Old June 1st 06, 03:23 PM posted to rec.aviation.aerobatics
external usenet poster
 
Posts: n/a
Default unported flop tube

Does your flop tube have a weight on the end? (it should have)

Is it flexible enough? Was the tube that you used new when you put it
in? (if not, old tubes are stiffer than new ones) Stiff is NOT good.

Was it specified for Avgas? (Some rubber will harden and thus stiffen
when submerged in avgas, so you need to make sure that it is the
correct compound). Remember, Stiff is NOT good.

Was the flop tube the correct length as specified for your aircraft?
(if it is too short that will happen) Also too long is not a good idea
either. Does it reach all areas of the tank?

Is your flop tube and weight still properly attached?

Did you use sealer on the connections? Some times if you did not seal
the connections and the connections are not submerged, theoretically
at least, air could get into the fuel line this way and cause problems.
I have never heard of this happening however, but others may have more
information.

Another thought, is the fuel venting system in your airplane correct,
or plugged when inverted? It may not even be the flop tube. How is
your system vented when inverted? If not properly vented, this will
also cause starvation.

In my Eagle fuel quantity does matter, in vertical maneuvers at least,
For a Hammer head I need at least 6.5 gals of fuel, or it will
unport. In my airplane that is okay, because that is the fuel level I
should be heading for the airport anyway. Have you tried to determine
how much fuel you need to have to avoid this problem?

In inverted flight I have never had it unport.

See our website www.gut-works.com

Call if we can help.

Keep the dirty side up, and the clean side down.

Ron



jasonlee wrote:
A possible fix would be to keep the tube submerged at all times by,
making the tube mobile or attaching a float at its end to keep it
where it should,
another solution may be , and dont trust me here , test it first, to
make the tube double ended so one end would always be submerged.
a third solution may be to mount the end of the tube so that it
pivots and follows the fuel all this time being submerged.

This you will have to engineer yourself.


 




Thread Tools
Display Modes

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

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Hilsch Tube for Cabin Temp control... EridanMan Home Built 8 April 11th 06 03:17 PM
Rag and tube construction and computer models? BllFs6 Home Built 24 April 12th 04 12:20 PM
Why 4130 tube? Leon McAtee Home Built 31 March 28th 04 03:04 PM
Chuck Yeager-pitot tube Ron Military Aviation 44 October 9th 03 03:13 AM
Is a cracked vent SCAT tube an urgent problem? Ben Jackson Owning 18 September 20th 03 03:31 AM


All times are GMT +1. The time now is 08:23 PM.


Powered by vBulletin® Version 3.6.4
Copyright ©2000 - 2017, Jelsoft Enterprises Ltd.
Copyright 2004-2017 AviationBanter.
The comments are property of their posters.