Plenum with stock cowl

[cdeerinck]

Originally Posted by cardinalflier

Chuck: I am in Northern Ca. And would be interested in a plenum for my RV6 and would like to explore the split shipping. Please let me know what you find out. Thanks, Bruce Estes

Bruce - Will do.

[cdeerinck]

Originally Posted by cardinalflier

Chuck: I am in Northern Ca. And would be interested in a plenum for my RV6 and would like to explore the split shipping. Please let me know what you find out. Thanks, Bruce Estes

Bruce,

I was told by RV Bits that to add an additional plenum would increase the shipping price by $80. Then you would need to add on the price for me to ship it to you. So you would save some, but I'm guessing not a lot. Maybe $100 in total. I will be ordering soon, so let me know if you want to pursue this.

I was just going to buy the non-CF plenum (which was made by RV Bits for an 8) from my buddy, but since I have to pay the shipping for the gear transition fairings anyway, that wouldn't really save me any money. So I am going to get both the plenum and fairings in one shipment.

[cardinalflier]

Chuck: thanks for the info. I emailed RV Bits, inquiring about a plenum for my RV6 but have not heard back. What is the cost for your new plenum and is it glass or c/f? I am still thinking of making my own but need more info. Thanks, Bruce

[BillL]

You might check out this link - Very nice work, the best inlet connection to the cowl I have seen posted.

http://www.vansairforce.com/communit...67&postcount=1

I made my plenum cover based on a layup of the inside of the cowl. It has to be finished first or it is a tremendous amount of work to finish it smooth. I like the way Pete Howell did his. He cut some foam insulation blocks and filled within the baffle area and did a lay up on top. This way you could make the 90 perimeter flange too. Aluminum would work fine. The center hump matching the trailing shape of the spinner is not necessary, unless you have something to clear.

Personally, I would make the inlets one piece to the rings with urethane flexible ducts like DanH made his, if I were to do it again. My neoprene works great, very flexible, but having enough straight length is a design problem for the ideal inlet diffuser shape. There is not enough length on the vans cowl to waste any.

I think the most difficult area is that inlet ring to mate with the cowl. At least it would be for me.

Good luck in this project, and be sure to measure your upper and lower cowl pressures before and after to know what you have. Otherwise, it is literally shooting in the dark.

[N941WR]

Originally Posted by N733JJ

I flew without the plenum for many years but looking out at the cowling bulging from the internal pressure. Couldn?t stop thinking about the pressure on the sky bolt fasteners, couldn?t take my eyes off the ?scalloping? between the fasteners...

Scott

Is that from the internal pressure or the airflow over the top of the cowl lifting on the cowl?

[Marc Bourget]

I believe there is much more dynamic pressure possible than "lift" from slipstream airflow.

[Janekom]

Originally Posted by cardinalflier

Chuck: thanks for the info. I emailed RV Bits, inquiring about a plenum for my RV6 but have not heard back. What is the cost for your new plenum and is it glass or c/f? I am still thinking of making my own but need more info. Thanks, Bruce

Did you email Chris or me? I did not receive anything yet.

[cardinalflier]

I email you as listed on your website. I want pricing for a plenum for my RV6 with a IO360. Thanks, Bruce Estes. brucee7837@aol.com

[NYTOM]

Originally Posted by cardinalflier

I email you as listed on your website. I want pricing for a plenum for my RV6 with a IO360. Thanks, Bruce Estes. brucee7837@aol.com

Bruce did you ever get that quote from Jan? I wanted one from him a while back and he said they weren?t fabricating them at that time but would let me know in a few months when they were and let me know so I could place my order. Never heard from him and then noticed they were removed from his site. They looked like a pretty nice product. I purchased their gear leg fairings and there top quality.

[cardinalflier]

I did not get a response. Nothing. Not even a polite ?We are not building that plenum?. Bruce Estes