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air scoop on HKS

 
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lcottrell



Joined: 29 May 2006
Posts: 1494
Location: Jordan Valley, Or
PostPosted: Fri Mar 27, 2009 11:26 am    Post subject: air scoop on HKS Reply with quote
Jerry from Green Sky AV. sent me a pair of alum air scoops, that someone had made for an earlier model of HKS, to try to see if I could reduce the temps without moving the oil cooler. With the muffler and oil cooler on top of the Firestar wings the air is disrupted enough that the temps on the engine are way too high, bumping redline at anything over 5300 RPM's.

I am pleased to report that they worked just fine. I was able to use the engine as I wished without regard to overheating for the first time.

Results of the test are (at) 43 degrees OAT. (at) 5350 RPM - 286 degrees. (at) 5750 RPM 304 degrees. (at) 6150 RPM- 304 degrees. I currently have 21 hours on the engine.
I flew for one hour and 12 minutes, total of one hour and 24 minutes counting warm up and burned 4 gallons of fuel. 91 Octane mogas.

This is a reduction of 40 degrees through the entire range of operation. I can live with that.
Larry C

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John Hauck



Joined: 09 Jan 2006
Posts: 4639
Location: Titus, Alabama (hauck's holler)
PostPosted: Fri Mar 27, 2009 11:48 am    Post subject: air scoop on HKS Reply with quote
Thank God!!!

Now...us Rotax guys won't have to hear you whine during our visit to the Rock House in May. Wink

Glad you got some real relief.

john h
mkIII
Quote:

This is a reduction of 40 degrees through the entire range of operation. I can live with that.
Larry C

_popupControl(); [quote][b]

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John Hauck
MKIII/912ULS
hauck's holler
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herbgh(at)nctc.com
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PostPosted: Fri Mar 27, 2009 11:48 am    Post subject: air scoop on HKS Reply with quote
Larry

Not unlike the scoops used on the Jabiru's on Titan airframes... Herb

At 02:25 PM 3/27/2009, you wrote:
Quote:
Jerry from Green Sky AV. sent me a pair of alum air scoops, that
someone had made for an earlier model of HKS, to try to see if I
could reduce the temps without moving the oil cooler. With the
muffler and oil cooler on top of the Firestar wings the air is
disrupted enough that the temps on the engine are way too high,
bumping redline at anything over 5300 RPM's.

I am pleased to report that they worked just fine. I was able to use
the engine as I wished without regard to overheating for the first time.

Results of the test are (at) 43 degrees OAT. (at) 5350 RPM - 286 degrees.
(at) 5750 RPM 304 degrees. (at) 6150 RPM- 304 degrees. I currently have 21
hours on the engine.

I flew for one hour and 12 minutes, total of one hour and 24 minutes
counting warm up and burned 4 gallons of fuel. 91 Octane mogas.

This is a reduction of 40 degrees through the entire range of
operation. I can live with that.
Larry C


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lcottrell



Joined: 29 May 2006
Posts: 1494
Location: Jordan Valley, Or
PostPosted: Fri Mar 27, 2009 11:56 am    Post subject: air scoop on HKS Reply with quote
Smile
Larry
[quote] ---

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ces308



Joined: 03 Nov 2008
Posts: 317
Location: houghton lake ,mi
PostPosted: Fri Mar 27, 2009 6:16 pm    Post subject: Re: air scoop on HKS Reply with quote
Alright !!! Finally a real airplane engine !!! lol

chris ambrose
M3X-jab

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