30 second setup for the YS 140DZ

[EHaury at aol.com]

Tony is correct in that the DZ runs fine with a regular tank arrangement, 
However, here's a couple of points to consider.

1. A tank with an open vent operates at atmospheric pressure and fuel is more 
likely to be vaporized (foam) from vibration. (Hence the foam clunk.) More 
isolation from the airframe is desirable than was necessary with the previous 
pressure supply system.

2. Considerable fuel expansion occurs when exposed to temperature increases 
(sitting in sun). A bladder tank that is completely filled using a syringe 
will encounter significant pressure increase as a result. This increased 
volume must go somewhere, options include flooding engine, breaking the tank, 
removing lines, etc. Fitting the bladder (bag) tank as shown on the package 
and filling with a pump while the vent is open minimizes the problem, as the 
bag doesn't completely fill the tank (18 oz in a 20 oz tank). This leaves 
sufficient room for expansion.

Earl
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://lists.f3a.us/pipermail/nsrca-discussion/attachments/20030407/38d21537/attachment.html