The little pipe for crank case breathing barely works in a street car averaging 2,200 RPM. Race cars are required to have a minimum of one quart container to recover spent crank case vapor and oil droplets, in order to keep oil off of the track surface.

 

The smaller the diameter of that pipe the higher the velocity of fumes exiting the case and the more likely that some oil will be carried away.

 

I use a piece of 5/8" electrical conduit in that position. This reduces the velocity of the gas flow and nearly stops oil loss at speed. The racer runs around trying to average 9,400 RPM. You will be trying to average 5,000 RPM. In both cases well above  the design performance of that little tube. Just feed that output into a pop can or similar during early testing to see if further thought is required.

 

Lynn E. Hanover

 

I just tubed it over to the air filter box, but I've always been curious as to what others are doing with this as well, but just never bothered to ask.

Todd Bartrim

On Thu, Apr 20, 2017 at 8:54 AM, ARGOLDMAN <flyrotary@lancaironline.net> wrote:

I am finally finishing my renesis rebuild, with so much help from this list-- thanks

 

My question is with regard to the ventilation of the case. it seems that the rotary has a nipple off of the filler tube for this purpose... (I don't think that I have that tube currently and will probably make one)

 

Using this port, is it a good idea to just plumb it out of the back of the airplane as with a crank case vent?

Is the amount of oil/vapor created significant enough to collect it and recycle it?

 

What ch'all doing?

 

Thanks again,

 

Rich