Or, another example. The large doors on my barn/hangar face basically North. Many times I leave them open, even when it storms, and many storms come from the NW. Things don't get blown around,

Hallelujah! I have been preaching it, but everyone is obsessed with NACA shapes, oil flows, VG’s etc. if you don’t have low pressure exit (pull), it ain’t going to work, Or just barely on the

Good topic. Just passing through from left field. “Almost any inlet will work if there is low pressure, or low enough pressure aft of the cooled element. And almost no inlet will work if there is

Michael Carra, looking for "how to info" on this F-104 Starfighter inspired armpit. Do you have pics on the other side of this mod? inside the cowl? Builders log sort of thing? Thanks!

For those of you who still remember how to do Calculus and Differential Equations (which excludes me), I refer you to a NACA report, from 1948, titled "An Experimental Investigation of the Design

That does it for me; I will cut them off on my next opportunity (too hot for anything these days). I'd like to see that. If you'll fly to Independence some time I'll buy lunch. Of course, if you

I think not! I love experimenting on my own plane but only to solve a problem…. Which I don’t have at the moment. I did add a camera to the back of the plane so I could see what I just missed.

Yes and yes. I had those corners on the NACA for awhile (mainly because I noticed Klaus did) and noticed no difference so I cut'em off. When I built a new lower cowl a couple years ago I incorporated

Here’s an option for you… No to NACA… Do you want more air coming up through your cylinders? Think F-104 Starfighter. Use the sump blisters under the armpits and try this… See attached

Thanks Don, Roch, and Todd. Three in the plus column; no negative (so far). Thanks too, Bob -- you make four. I did try VGs ahead of the beginning of the ramp but when I designed and placed them in

Rock, one way to find out for sure is to do a before and after (you cut them off) comparison. You can always glue them back on. --

I remember Klaus talking about adding something like that, with good results. If you need more air into the inlet, VG’s close to beginning of the “ramp” seem to be the hot ticket. Tc

I think it’s designed to prevent overflow and channel more air in. I actually have this on my aircraft and it seems to work great for me. I don’t ever have cooling issues so it must do something

Those little strakes are there to help contain the air flowing into the cowling. Oil flow tests have shown that without them air escapes the cowl inlet in the corners. Hope this helps. Don

The attached photo is a Long-EZ NACA inlet. Has anyone seen a geometry like the parts I've circled? What is their purpose? Is there any basis in science for them? (I'm tempted to cut them off to

Hi Ricardo & Steve, Unfortunately I need the 5/8” H45. Thanks for the response though! -Matt

Matt, I just checked our stock here at AeroComposites and Greg and I do have some of the H45 foam in 5/8. How big of a piece do you want? Ross -- Thank You! Ross Burk 307-277-4642 cell

Hi Matt and all, I have the following pieces of foam: 02EACH F500-035 3/4X24X48, H45, 3#, DIVINYCELL P FOAM 01EACH F500-055 1/4X26X39-1/4-H100, 6# BLUE FOAM 04EACH F400-085 0.2X12X48, 18LB YELLOW

Matt, I have some substantial scraps of 1/2 inch Corecell M foam that I am using on the Dory. It would work well on airplanes I'm sure but it isn't 5/8. How big of a piece do you need? Steve

Does anyone have some extra 5/8” R45/H45 foam that they’d like to sell? I only need a few square feet and A/C Spruce doesn’t have any in stock. I have a couple holes in my Defiant fuselage that