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Speed,Combat,Scale,Racing => Speed Talk => Topic started by: mike londke on March 29, 2013, 01:26:17 PM

Title: Cat-Jet Engine Run
Post by: mike londke on March 29, 2013, 01:26:17 PM
A short video of the Dyna-Jet powered Hoyt Cat-Jet airplane running in my shop. Yes, I had ear plugs. Yes, I had a fire extinguisher, and Yes it pi$$$ed the neighbors off. Enjoy, Mike http://www.youtube.com/watch?v=UZ3jzXbRXK0
Title: Re: Cat-Jet Engine Run
Post by: MarcusCordeiro on March 29, 2013, 06:38:28 PM
YEAH, YEAH, YEAH!!!!

Love it Mike!!
Man, I gotta get myself one of those...

Don't forget to post a video of you flying it #^ #^

Marcus
Title: Re: Cat-Jet Engine Run
Post by: john e. holliday on March 30, 2013, 08:29:57 AM
Lucky that it didn't come apart on you.   I was always told to never static run a Dyna Jet on a stand.   Fire it up and fly.  Of course after my first experience seeing a Dyna Jet was Bob Watts out of Excelsior Springs MO flying a Dyna Jet powered stunt type plane.   It was loud and fast.   He also said you don't keep it on the ground too long, like no more than to start and launch.
Title: Re: Cat-Jet Engine Run
Post by: mike londke on March 30, 2013, 03:33:40 PM
Respectfully, I have to ask- Why would it come apart? ?? It is an extremely strong model that has just been rebuilt. As for bench running it, a 20 second run will not hurt it. I have been messing with these things for 30+ years. This very engine has been flying since 1968. My father flew it all through the 70's and now I have well over 200 flights on it and countless bench runs to show it people how it works. There are many videos of bench runs lasting several minutes. The only issue with having it on an airplane and firing it up is you will blister the paint if you don"t get some air moving over it within 30 seconds or so. That's the main reason for quick launches.  :) :) :)  Mike
Title: Re: Cat-Jet Engine Run
Post by: john e. holliday on March 31, 2013, 08:36:23 AM
I guess the Dyna Jet that blew up on the guy must have had a flaw.   Was told it was bench mounted at the time not on a plane.   
Title: Re: Cat-Jet Engine Run
Post by: mike londke on March 31, 2013, 12:08:24 PM
That would certainly ruin your day. I hope I never get to see one do that! :)
Title: Re: Cat-Jet Engine Run
Post by: Stan Bidowski on April 02, 2013, 11:36:57 PM
Mike, what fuel are you using in this run?
Title: Re: Cat-Jet Engine Run
Post by: mike londke on April 03, 2013, 07:45:56 AM
Stan, It is Plain old 92 octane unleaded gasoline. We ran regular leaded gas when it was available up to the early 90's.  I know there are other choices for fuel but this is the only fuel I have ever run in a Dyna-Jet. I have no experience with other fuels. Someone with more knowledge might fill us in on other options and how they work. This airplane was never flown in any contests, it is strictly for fun. That's pretty much why I never tried using other fuels. Using gasoline and the stock metering jet worked very well for us. Very reliable, easy starts, consistent runs. Its a very fun airplane to fly, I will post a video soon. Mike
Title: Re: Cat-Jet Engine Run
Post by: MarcusCordeiro on April 17, 2013, 08:41:51 PM
Looking forward to the video!!!
I gotta get myself one of those...

Marcus