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Hexadyne 2 Cyl

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frank-margie(at)worldnet.
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Posted: Sun Jan 29, 2006 9:21 pm Post subject: Hexadyne 2 Cyl

Interesting article in the recent CONTACT magazine (issue 81) on the Hexadyne aero engine.  Includes pictures of two different Kolbs fitted with pre-production "test" engines.  2 cyl opposed, 60 HP, 98 lbs including redrive/starter/alternator.  Very interesting technical features (4 valves/cyl, electronic fuel injection and engine mgt, directly opposed cyls using 2 rods on one side).  Unfortunately not cheap, listed at $8800.  The manufacturer's web site is also interesting, www.HexatronEngineering.com.



Frank Clyma

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firebug

Joined: 22 Jan 2006
Posts: 36
Location: Montgomery Alabama

Posted: Sun Jan 29, 2006 9:51 pm Post subject: Re: Hexadyne 2 Cyl

They have been developing this engine for years. At least 4 or 5 I believe. I would be nervous about buying one until they had a track record and financial stability with the company.

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John Jung

Joined: 10 Jan 2006
Posts: 108
Location: Surprise, AZ, USA

Posted: Mon Jan 30, 2006 4:38 am Post subject: Re: Hexadyne 2 Cyl

 	  frank-margie(at)worldnet. wrote: 	
		  Interesting article in the recent CONTACT magazine (issue 81) on the Hexadyne aero engine. 	




I got a chance to meet Cy Williams (President and Chief Engineer) at Copperstate, last October. He gave a talk about his engine in the CONTACT booth. I had also seen it at Oshkosh more than once and a friend tried his engine on a Mark III that was used for towing hang gliders.



I think that Cy is on track, although very slowly, to have a good engine available. The problem that was yet to be resolved, as of last October, was leaks. Because the pistons move toward each other at the same time, the crankcase changes from high pressure to low pressure every revolution of the crank. A one way valve was added so that the crankcase would operate in a near vaccumn, and testing was proceeding.



There also was one plane flying a Copperstate with the Hexadyne. It had no muffler and it was loud. The situation for mufflers, as of then, was the builder designs his own.



The Hexadyne appears to be a good size and weight for the Firestar, when and if the development gets far enough along. Of course everone has his own level of experimenting that they are willing to do. I just am not willling to pay $8800 so that I can do a companies testing. Some people are willing, and without them a small company like Cy's would probably not be able to come out with a new engine like this.



What kind of Kolbs were in the pictures in CONTACT?

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_________________
John Jung
Firestar II N6163J
Surprise, AZ

rswiderski(at)earthlink.n
Guest

Posted: Mon Jan 30, 2006 2:27 pm Post subject: Hexadyne 2 Cyl

John, the 2 Kolbs were a FS & MkIII		-Richard Swiderski



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