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Hi Ernest, one assumption you make that I will throttle back for cruise, is probably not true. At least I have seldom done so with my Continental powered Tailwind. I plan to take off full throttle and cruise right around 6000 rpm which is the sweet spot (lowest bearing load) for the 13B. But your point about the complexity of the switchable intake is well taken. I prefer the idea of filtered ram air and am going to see I can fit it under the cowl. It is amazing that we have been able to talk ourselves into supplying unfiltered air at all. Lot of rationalizing on that one. I am as guilty as anyone else. BTW, a few months ago I proposed the filtering ram air on the other list and was told that filters and ram air did not go together. I gave it up at that time but here we are again. Jerry
On Monday, April 18, 2005, at 09:17 AM, echristley@nc.rr.com wrote:
I am building my
intake right now and it will have filtered air with the option of
switching to ram air at altitude. Do you think this is a good
idea? > Certainly some dust exists even at 10,000 ft. Jerry
Jerry, can we examine the basic premise for a moment?
You've stated that you'll use filtered air next to the dusty Earth and unfiltered ram air at altitude. The contradiction that I'm seeing is that near the dusty Earth is where you want the extra power that would be supplied with the unfiltered air. At altitude you'll be throttling back for cruise power.
How do you view the cost/benefit of the extra complexity of the 'switchable' intake?
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