Case vent tube

Discussion of the Aerovee kit engine.

Case vent tube

Postby Darick » Fri Aug 25, 2017 10:22 pm

The case vent tube is normally cut at a 45 at the end where is exits the cowl. Is this to face forward, which would theoretically cause positive pressure into the case OR the cut facing aft which would theorletically cause negative pressure. There is one picture in the manual showing fabrication of the bottom cowl air exit baffle. In this picture the vent is facing forward, but there is no reference to the vent in the instructions. I'm using the oil separator too if this makes a difference.
Thanks.
Darick Gundy
Sonex #1646
N417DG
Taildragger, Aerovee, center stick, Prince P-Tip Prop
MGL E1, F2, V6 radio, Sandia Xponder, Reserve lift indicator (AOA), iFly 520
First flight! 10/21/2017
User avatar
Darick
 
Posts: 496
Joined: Mon Aug 05, 2013 9:39 pm
Location: PA

Re: Case vent tube

Postby Darick » Wed Aug 30, 2017 10:27 pm

Guys, Kerry answered my question...
"The oil breather tube does not need to be cut at any particular angle but
should NOT face forward. It can face down or aft. Some people (myself
included) had the oil breather drip onto an exhaust pipe so any oil that
existed it would burn up rather than streak the bottom of the airplane."
Darick Gundy
Sonex #1646
N417DG
Taildragger, Aerovee, center stick, Prince P-Tip Prop
MGL E1, F2, V6 radio, Sandia Xponder, Reserve lift indicator (AOA), iFly 520
First flight! 10/21/2017
User avatar
Darick
 
Posts: 496
Joined: Mon Aug 05, 2013 9:39 pm
Location: PA

Re: Case vent tube

Postby kevinh » Wed Aug 30, 2017 11:12 pm

Speaking of that - yeah. I had the breather drip onto the exhaust stack (about a 1/8" - 1/4" gap) on my RV and that was how Van's recommended it. Worked good.

Also this thread might be interesting to you: http://www.vansairforce.com/community/s ... p?t=126270
Taildragger Waiex in progress, tail done, wings done, about to mate wings to fuse,
then cowl, canopy, paint (photos): flush rivets, turbo aerovee, acro ailerons
(I built my RV7A and happily flew it for about 500 hrs)
User avatar
kevinh
 
Posts: 369
Joined: Mon Feb 23, 2015 10:46 pm
Location: San Mateo, CA


Return to Aerovee

Who is online

Users browsing this forum: No registered users and 5 guests