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craig.nelson(at)heraeus.c
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 Posted: Fri Dec 11, 2009 10:45 am Post subject: cowl |
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<<DSC_1983.JPG>> De <<DSC_2463.JPG>> nn <<DSC_2465.JPG>> is
<<DSC_2469.JPG>>
<<DSC_2471.JPG>> I have enjoyed Ricks pictures of the cowl project, it
certainly was fun for me. My hat is off to any one that dives into a
project and sees it through. Rick it looks great, The undisturbed air
really is a plus and the cowl becomes a lifting body. I had trouble here
in Arizona on 110 degree weather without the cowl ....if the tower had
me hold on the ground for long periods of time the engine would
overheat. On one occasion whale idling on the ground I overheated and
blew all the water out... now with the cowl I can idle all day long on
any Arizona summer day..I had to make a cowl flap for cold days (like we
are having today.. a balmy 50 degrees) to get operating
temperatures...... I have molds and would make a cowl if anyone was
interested.... it will not fit a VW engine it will only work on a rotax
912
Uncle craig
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John Hauck
Joined: 09 Jan 2006
Posts: 4639
Location: Titus, Alabama (hauck's holler)
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| Posted: Fri Dec 11, 2009 12:45 pm Post subject: cowl |
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On one occasion whale idling on the ground I overheated and
blew all the water out... now with the cowl I can idle all day long on
any Arizona summer day..I had to make a cowl flap for cold days (like we
are having today.. a balmy 50 degrees) to get operating
temperatures......
912
Uncle craig
Uncle Craig/Gang:
Very unusual for a 912UL or ULS to overheat at idle, even on 110F days.
Normally takes a long time to get the engine oil temp up to the required
120F prior to going full power for take off.
Do you have accurate performance figures of your aircraft with and without
the cowling? I'd be interested in seeing what the actual performance
changes were.
john h - Freezing in Alabama.
mkIII
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_________________
John Hauck
MKIII/912ULS
hauck's holler
Titus, Alabama |
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craig.nelson(at)heraeus.c
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| Posted: Fri Dec 11, 2009 3:12 pm Post subject: cowl |
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John my radiator has always been mounted in front of ther engine not
much air moving through it at idle...with the cowl air is moving at
idle. I feel the airfoil on our kolbs realy is not about speed. that
said the clean air going through the prop maks less drag. With the strut
farings and the cowl my cruse was 90 at 5300. I am yet to see what the
faring on the gear legs and wheel pants do. I have not had much time to
get it together since the pannel rebuild. I started it Saturday.. I have
an artificial horizion sensor problem..plan to get the bugs out it and
start it again tomorrow...hopefully fly B4 Christmas
--
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John Hauck
Joined: 09 Jan 2006
Posts: 4639
Location: Titus, Alabama (hauck's holler)
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| Posted: Fri Dec 11, 2009 3:59 pm Post subject: cowl |
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> John my radiator has always been mounted in front of ther engine not
| Quote: | much air moving through it at idle...with the cowl air is moving at
idle.
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Uncle Craig/Gang:
Get that MKIII put back together and flying. MV will be here before you
know it, 5 months on my Alabama calendar.
John W had his radiator mounted in front of the engine. Usually, had a
couple wraps of tape on each side of the radiator to keep the temps up,
summer and winter. I asked him why he didn't go to a smaller radiator.
Said he already had that one mounted. It was easier to tape than replace.
My mkIII will do 90 mph at 5300, no engine cowl, no gear leg farings, and
800X6 tires with no wheel pants.
What are you flying with an attitude indicator for? There is no weather in
Arizona.
Are you using a Titan exhaust system with you own silencer? I remember you
having a problem during testing with the silencer.
I replaced the Rick Thomason STE exhaust system with a new Titan system
recently. I have flown my present 912ULS, since new, with the STE system.
After 413.8 hours, the baffles have come loose in the left silencer. This
was causing high engine oil temps and loss of power. With the new exhaust
system, I feel like I have gotten another new engine. What a difference a
good breathing exhaust system makes.
I'll be ready to race at MV.
john h
mkIII - 2,980.5 hours
912ULS - 413.8 hours
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_________________
John Hauck
MKIII/912ULS
hauck's holler
Titus, Alabama |
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craig.nelson(at)heraeus.c
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| Posted: Fri Dec 11, 2009 6:59 pm Post subject: cowl |
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<<DSC_1513.JPG>> Uncle Craig/Gang:
Get that MKIII put back together and flying. MV will be here before you
know it, 5 months on my Alabama calendar.
John
Good to hear from you
Its going together John... I've messed around 4 8 years and it is time
to fly. I know I don't need an artificial horizon in Arizona or any
where I would fly ..but it just looked aircrafty. Had to have it. My
exhaust is the titan one you had before. mine has a different muffler.
Ya I did have trouble with it... it was welded up by a motor cycle guy
rather than the welder that did my tank, he was too busy to weld the
muffler and I should have waited for him... the welds the motor cycle
guy did not penetrate and he ground most of what was, off... the back
of the muffler and exhaust tube went through the prop slamming it into
the flap. ... I wonder if the new titan one would fit under my cowl...I
admire Rick for his project those things get a guy going... I had fun
doing all the stuff I did to my plane, the reason I did it was because I
can..... Not really to improve the design....I did it because I like
the way it looks. The kolb design to me is the spirit of true flight.
Great visibility!!!closest thing to a helicopter without the maintenance
or disk, slow enough to have fun, fast enough to go across the country
and almost vertical takeoff and landing...but john I have to tell ya,
you and lots of other guys are doing it...FLYING AND ENJOYING Your Kolbs
....it's time to stop the tinkering and fly!! I like your KISS rule I
could have been flying...let's see what we can do at MV... I'll race you
for breakfast....if I don't fly to MV this year I'm not going
Uncle craig
15 hrs flying
2,000,000 hrs fussing, tinkering and building--enough is enough
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bill_joe(at)bellsouth.net
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| Posted: Sat Dec 12, 2009 3:17 pm Post subject: cowl |
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Hi Craig,,do you have thee-mail of the guy who has the mold for the
cowl.Maybe he will see my post and get with me off the list..Thanks
Bill Futrell
Do Not Archive
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