Mark, Nice work on the airbox (as usual)....however, I did notice a couple of areas that I was wondering about: 1.) The heat muff is secured by wrapping safety wire around it? What prevents vibration from allowing the heat muff to move around and start chafing the header? Also, wouldn't vibration cause the safety wire from moving around and then possibly falling off? The off-the-shelf heat muff uses hose clamps to secure the muff to header, could you cutoff the forward side of it to allow air into it? Then secure it to the header with the rear hose clamp.
2.) I noticed what appeared to be platenut holes for the carb mount, yet you stated in the text (2nd to bottom picture) that you needed to get your daughter to start the nuts. In your improved (next) version will you utilize platenuts? 3.) The air filter looks like it needs something to support it in the center. Especially since you added a diffuser plate to the center of the filter. From the way it is supported only along the top and bottom, it concerns me that the combination of ram air and engine vacuum could cause the filter to collapse, then get sucked down to the carb and block off the airflow to the carb during flight....Not a good thing. My suggestion is to add vertical "vanes" to the angles that support the filter, or add an angle to the ram air diffuser plate that is the same height as the filter... or some other method that would prevent the filter from collapsing. 4.) Please re-think the emergency air-valve. Adding it would serve two functions: a.) emergency air source if both valves are shut. b.) Act as an additional source of cowling air if the heated air from the muff is inadequate for conditions. Don't use a magnet, but rather a very light helical, torsion spring to keep the valve closed until it was necessary. If you hinge the emergency air flapper around the existing ram air valve pivot, you could add an additional hole to front of the airbox, and at least the emergency air source would be filtered. 5.) I was more than a bit suprised not to see the airbox made out of Carbon Fiber or at least fiberglass. The rest of the cooling system was made from composite... Of course, just get the thing flying is certainly a factor here I'm sure. Mark Langford <n5...@hiwaay.net> wrote: http://home.hiwaay.net/~langford/corvair/airbox/ for more details... Scott Cable KR-2S # 735 Wright City, MO s2cab...@yahoo.com __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com
