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So, if you're seeing more on the EFIS than any reasonable calculation, well, it would have to be magic. Quote:
BTW, 74F at 13,500 feet? Is it really that hot over California? |
Hot!
Well, I can't prove any of it, so far and I don't want to be bragging about inaccurate numbers. I'm just going by what my instruments show. That's why I want to hear other people's numbers.
Yup, it was hot. It was 98 when I took off from Chino and there is almost always an inversion. It was 104 at 3500' where I was trying to get some fuel nozzle data. Bumpy too. It was a relief to climb to the cool cool air of 74 degrees. ;-) It was hot the whole time I was flying off my 40 hours - 2, 3, even 4+ hrs a day. I was also commuting 65 miles one way and had to stop down and annual our 6A about halfway through. Wrung me out pretty good. I was trying really hard to make Osh. I'll have to measure my inlet. It is bigger than standard - maybe about 4.5" tapering to where I could get a short length of 4" scat onto it. I ran out of room behind the prop and had to make it larger to not constrict at the dome of the filter. I'm running an FM-150. One factor I just thought of - the inlet is right, and I mean right, behind the prop. The 74RV has a pronounced twist and some extra chord at the root. The folks at Whirlwind told me that they had reports that this prop cooled very well on the ground. That might account for some extra MAP. Didn't Kent Pacer note some of that? Where's my copy of Speed with economy? Next time I go out to the airport I'll check the MAP against field elevation. If it is off, I think I can put an offset into the EFIS. Gotta put a big window in for the missus this weekend. Sigh. Ed Holyoke Quote Yep, that would magical. If I use your inputs with an assumed a 3.5"D intake and IO-360, pressure before the filter would be about 18.1" Hg. Mr. Short's report of 17.4 is probably pretty accurate. BTW, 74F at 13,500 feet? Is it really that hot over California?[/quote] |
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