Today's Message Index:
----------------------
1. 07:10 AM - Re: Static RPM for 100HP EA81 Subaru (LarryMcFarland)
2. 08:40 AM - Re: Static RPM for 100HP EA81 Subaru (LarryMcFarland)
3. 01:57 PM - Re: Static RPM for 100HP EA81 Subaru (Bryan Martin)
4. 03:38 PM - Re: Static RPM for 100HP EA81 Subaru (Bill Morelli)
Message 1
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| Subject: | Re: Static RPM for 100HP EA81 Subaru |
Bryan,
I use the tip of the blade to attach the pitch measuring gage. I did
send my heads to RAM Performance and h.p. could be a factor.
I have to tie off the landing gear facing into the wind with two ropes
going back to the trailer hitch on my Saturn. In max cruise,
currently, the plane will go another 300 rpm. I have a VDO tach and the
one on my EIS System and they're always within 100 rpm
of agreement. Static tests were last conducted summer of 06 in rather
warm conditions.
Larry McFarland
do not archive
Bryan Martin wrote:
> <bryanmmartin@comcast.net>
>
> Are you measuring the pitch right at the tip or at some other point on
> the blade? My Warp drive documentation says to measure at the tip of
> the prop. With my prop set at 17 degrees I only get about 4500 static.
>
> On Apr 2, 2007, at 8:52 PM, LarryMcFarland wrote:
>
>> <larry@macsmachine.com>
>>
>> Bryan,
>> With current jetting, my EA81 goes to 5100 rpm static and I fly with
>> the same prop set to 17-degrees. Pleased with this setting but that
>> might change if I ever get a LRI installed.
>>
>> Larry McFarland
>
>
> --Bryan Martin
> N61BM, CH 601 XL,
> RAM Subaru, Stratus redrive.
> do not archive.
>
>
Message 2
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| Subject: | Re: Static RPM for 100HP EA81 Subaru |
Bryan,
I think I've quoted you apples and oranges. What was written for rpm in
06 runups
and the rpms seen in Gary's data tends to suggest I could not have been
getting 5100 rpm
static at the pitch I'm using now. Please disregard my static number as
I believe it doesn't
agree with the pitch that was actually used last year. Too great a
range of difference as
I use the same prop but was taking data for rpms when the pitch was
being adjusted.
Another case of the fingers getting ahead of the brain.........
Larry McFarland
gary wrote:
>
>
> Would someone with a 100HP EA81 Subaru conversion with a three blade
> Warp Drive prop tell me what static RPM they're getting and what
> pitch setting. I think I've been running mine too coarse and I'm
> going to try a finer pitch and would like some ballpark figures to
> compare my results to.
>
>
> Here's what I get on my plane (engine rpm (prop rpm));
>
>
>
> warp 3-blade, 70", square tip
>
> stratus 2.2:1 reduction, 100 HP at 5400 rpm
>
>
>
> pitch static climb WOT
> level
>
>
>
> 12 deg 4800 (2182) 5000 (2272) 5400+ (2454)
>
> 14 deg 4600 (2091) 4800 (2182) 5000 (2272)
>
> 16 deg 4200 (1909) 4600 (2091)
>
>
>
> gary
>
>
Message 3
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| Subject: | Re: Static RPM for 100HP EA81 Subaru |
I just set my prop pitch to 14 and I'm getting 4900 static and 5200
WOT at 130 mph IAS. At 4400 I can still get about 105 mph so I think
I'm about where I aught to be. Thanks for the responses.
--
Bryan Martin
N61BM, CH 601 XL,
RAM Subaru, Stratus redrive.
do not archive.
Message 4
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| Subject: | Static RPM for 100HP EA81 Subaru |
Bryan,
I initially had my prop pitch at 12.5 degrees and had a static RPM of 4900 RPM
I now am at 15 degrees but have not checked the static RPM at that pitch setting
Bill
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