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Luvrbus (Luvrbus)
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Username: Luvrbus

Post Number: 112
Registered: 8-2006
Posted From: 74.33.63.92

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Posted on Sunday, October 07, 2007 - 12:15 am:   

Check this out about the new airplane engine at http://www.deltahawkengines.com
Kevin Black (Kblackav8or)
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Username: Kblackav8or

Post Number: 78
Registered: 8-2005
Posted From: 24.152.174.198

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Posted on Sunday, October 07, 2007 - 2:14 am:   

That is really neat.
JR Lynch (Njt5047)
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Username: Njt5047

Post Number: 180
Registered: 7-2006
Posted From: 69.132.233.230

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Posted on Sunday, October 07, 2007 - 7:50 pm:   

Reckon how far one would have to taxi to find diesel fuel? Nearest Flying J?
Hope it runs on jet fuel!
The Germans built diesel powered aicraft...not sure that they were 2 cycle.
JR
Bruce Henderson (Oonrahnjay)
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Username: Oonrahnjay

Post Number: 167
Registered: 8-2004
Posted From: 12.77.66.128

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Posted on Sunday, October 07, 2007 - 8:21 pm:   

A company called "Theilmann" or "Theimann" in Germany now makes 4-cylinder, 4-valve, turbocharged aero diesels that are used in the Austrian "Diamond Star" light aircraft. They're also doing a lot of certification for their use as replacement for conventional engines in many airplane types. It appears from "reading between the lines" that the Wisconsin company is *way* behind the German one in getting engines sold and in airplanes.

Having ridden a number of 2-stroke racing motorcycles, I think I'd rather have a 4-stroke up there turning the propeller.

And, yes, they're designed to run, as a diesel, on Jet-A fuel.
niles steckbauer (Niles500)
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Username: Niles500

Post Number: 790
Registered: 11-2004
Posted From: 72.91.168.92

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Posted on Sunday, October 07, 2007 - 10:05 pm:   

http://www.busnut.com/bbs/messages/233/9586.html
Luvrbus (Luvrbus)
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Username: Luvrbus

Post Number: 113
Registered: 8-2006
Posted From: 74.33.41.5

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Posted on Sunday, October 07, 2007 - 11:08 pm:   

Niles, i just posted the site because its a two stroke.I know diesels are not new to aircraft
niles steckbauer (Niles500)
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Username: Niles500

Post Number: 791
Registered: 11-2004
Posted From: 72.91.168.92

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Posted on Monday, October 08, 2007 - 12:08 am:   

Luvr - was responding about Bruce's post - sorry if I offended
gary throneberry (Garhawk)
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Username: Garhawk

Post Number: 14
Registered: 3-2007
Posted From: 72.156.222.253

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Posted on Tuesday, October 09, 2007 - 1:53 pm:   

bruce henderson

tried to e mail you. was rejected. don't know why.

is this the same bruce henderson who was once the chief factotum @ the Motorcycle Inudstry Council of Washington, DC?

if so, contact me. would like to hear from you.

gary t'berry
Gus Causbie (Gusc)
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Username: Gusc

Post Number: 504
Registered: 11-2005
Posted From: 63.97.117.42

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Posted on Tuesday, October 09, 2007 - 11:27 pm:   

Two-stroke Rotax? gas engines have been used for years in ultralights and homebuilt airplanes.

They were not very reliable and have been replaced mostly by the newer Rotax 4-stroke.
niles steckbauer (Niles500)
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Username: Niles500

Post Number: 793
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Posted on Wednesday, October 10, 2007 - 2:45 pm:   

Gus - I have a Rotax in my Hovercraft and it is quite reliable, never a failure, of course I'm only 6 inces off the ground - LOL
Kevin Black (Kblackav8or)
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Username: Kblackav8or

Post Number: 81
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Posted From: 24.152.174.198

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Posted on Wednesday, October 10, 2007 - 10:22 pm:   

2 stroke gassers are pretty reliable, if properly taken care of. There are many fewer moving parts to fail. My 2 stroke KTM dirt bike has been far more reliable then the 4 stroke Honda it replaced. No cams, valves, springs, timing chains. If you properly manage the mixture, there is only ignition and crank bearings and seals. Eventually direct injected 2 strokes will be commonplace. They are lighter, more powerfull and burn less fuel. I think the diesel 2 stroke aero engine has a great future if it gets fully developed.
Douglas Wotring (Tekebird)
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Username: Tekebird

Post Number: 259
Registered: 10-2004
Posted From: 71.59.75.212

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Posted on Wednesday, October 10, 2007 - 10:41 pm:   

yeah I have never had any issues with a 2 stk motorcycle. More power less weight, who can argue
Gus Causbie (Gusc)
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Username: Gusc

Post Number: 513
Registered: 11-2005
Posted From: 63.97.117.30

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Posted on Sunday, October 14, 2007 - 10:20 pm:   

I have always liked two stroke engines,the design makes all kinds of sense to me. I have a bunch of two stroke gassers around the farm in addition to the 671 and have no problems with them.

My comments on Rotax two-strokes were based on reading about their use in very light aircraft. I was looking at some of these light weights before I bought my Aeronca 7AC, no heavyweigh either. From what I have read the two strokes were not really reliable and it appears that most everyone has switched to the four stroke Rotax. Maybe I misread this but this is my interpretation.

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