REFLECTOR: Air intake

[steve korney]

Yet, it seems to screw up my high cruise LOP ops. I'm not sure why just yet, but this is only a race-day mod anyway

Notice that he says that it screws up his high altitude LOP ops...


Steve 

From: Reiff at lorenz.com
To: reflector at tvbf.org
Date: Thu, 6 Mar 2014 14:20:11 -0500
Subject: Re: REFLECTOR: Air intake

 Jack, Last summer at Oshkosh, I went to the performance and drag presentations that James Redmon and Terry Shubert gave. I got there early and asked James what one modification on his Berkut gave him the largest performance gain. He said without question it was the belly scoop dedicated to ram intake air pressure. The whole story (along with lots of other great info) is detailed on his web site. Specifically, see his write-up on his Clean Ram Air Modification here:http://www.berkut13.com/berkut61.htm#cram His cautioned me that the scoop helps a lot, BUT . . . you can't just stick a pre-molded scoop on the cowl and have it work. Most scoops have oversized openings, don't have the interior shape that allows pressure to build, and are poorly fared. To get a good performance boost, you have to figure out exactly how much air your engine needs, size the opening to match, provide an air expansion chamber, and shape the exterior aerodynamically. To achieve this, he removed the stock Berkut belly scoop and created a custom one in 2012. Hope this helps!  Reiff Lorenz, Dayton, OHVelocity XL-RG, 54% completeCurrently working on: Catching up on Reflector reading! Velocity Owners and Builders Associationhttp://www.velocityowners.com    James Redmon's ram air belly scoop.    From: reflector-bounces at tvbf.org [mailto:reflector-bounces at tvbf.org] On Behalf Of Jack Prock
Sent: Monday, March 3, 2014 12:12 PM
To: Velocity Reflector
Subject: REFLECTOR: Air intake Hi, I would like to know if anyone has any thoughts on air intakes. I am getting down to the lastfew items on my list before flight and one thing I was thinking about was to put in an air intakescoop under the engine cowling. Something along these lines:  Now my question, is for the people that have put an external air intake on the plane.Do you get a boost at higher altitude because of the ram air effect? Does the drag ofthe scoop outweigh any positive effect from the boost?  I have already started designing the scoop, but now have second thoughts and wantedto see if I was going down the wrong path. Any thoughts? Jack Prock
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