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Old May 10, 2014, 12:41 PM
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orlando fl
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1/2 A glow ducted fan

Ducted fan 1/2 A (.061) glow engine power (5 min 23 sec)


I just found this out in the garage, thought it was a nice blast from the past.
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Old May 10, 2014, 04:02 PM
Complete RC Idiot Savant
The Netherlands
Joined Nov 2009
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Brilliant!

I did build a Cox TeeDee .051 in a Robbe Gnat, about 16~17 years ago, using the fanunit intended for that model.
Made an unbelieveable racket, and delivered almost 3N thrust, but I was never eable to start it in the model and fly it....

Brgds, Bert
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Old May 10, 2014, 05:03 PM
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Thanks Bert. yes starting was always an issue, if I continued with the project it would have been a open nacelle type jet. The noise just ruins the whole effect so it will really just go down as a learning exp. I may try to fire it up, if I do I will roll some video so as to show it in action. It has not been started in at least 15 years so I do not know how gummed up the motor may be.
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Old May 10, 2014, 05:20 PM
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Joined Sep 2006
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Bought an Axiflow .049 in the 80's, assembled it for a TD .049 but never actually tried it in a plane(wanted to make a C/L ducted fan jet but didn't think it had enough power for that). It wasn't too hard to start using an Astroflight starter and priming with a syringe but the Axiflow spinner required careful balancing and assembled right to run true. All 1/2A DF of the time needed Bungee to get in the air, a Norvel is probably a better choice than the Cox TD! There is a long thread on RCU about 1/2A ducted fan:
http://www.rcuniverse.com/forum/1-2-...ideration.html
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Last edited by coriolan; May 10, 2014 at 05:29 PM. Reason: Missed one W! Added link
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Old May 10, 2014, 05:29 PM
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orlando fl
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this one actually worked pretty well. the home made rotor was lighter (I bought a RK 09 size, never got it assembled, all the clear plastic and bolts etc... lost interest in it).

The norvel had a pretty good throttle (even though it needed to run WFO to get any power) which added a dimension that I wanted. I made another DF using the big helo head for better cooling but again it just stuck out and was ugly. The norvel helo engine with the exhaust throttle is a VERY good setup for controlling the speed, but that would be a lot of junk in the air flow. I have a LM 110 helo somewhere around here that has not be run in years, mid 90's I think. I learned to fly on that one, I really enjoyed that and the engine was super reliable.
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Old May 11, 2014, 10:43 AM
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United States, WI, Slinger
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Neat. I had a TD .051 powered Axiflow unit in a magazine plans built sorta scale F-16 back in the late 80's. Never had much success with it. It didn't have near enough thrust to do more than stagger along after a good heave!


Mike
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Old May 11, 2014, 05:31 PM
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orlando fl
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I was thinking I had it on a foamie glider, but the more I think back on it the more I think it was a GLH but again just can't recall. It may have been an electrostreak, what ever it was it was a pretty clean airframe, and the speed was not very impressive, but it did fly well. I just seem like a GLH would have been too small and the only other plane I was flying back then as the electrostreak.
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Old May 14, 2014, 02:02 PM
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http://www.rcgroups.com/forums/showp...7&postcount=29

So it was a DMA Flea airframe, I forgot that and I mentioned it was putting out max of 13oz, not bad for a .061

That old AOL hometime or what ever account had a bunch of pics on it but I have no idea what became of it.
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Old May 22, 2014, 07:04 AM
I work Graveyard
United States, WA, Seattle
Joined Apr 2014
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I have an 049 axiflo fan new in the box. It is missing the instructions and shroud which was 1/64 ply as I remember. Anybody post a set of instructions?
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Old May 22, 2014, 04:07 PM
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North Texas
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The shroud was fiberboard on mine. I'll have to check to see if I still have the instructions.

See:

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Old May 23, 2014, 12:40 AM
I work Graveyard
United States, WA, Seattle
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Can you give me the dimensions of the shroud please?

Found some instructions

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Old May 24, 2014, 05:03 AM
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North Texas
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Here they are, You should also have all these other fiberboard parts.




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Old May 24, 2014, 02:53 PM
I work Graveyard
United States, WA, Seattle
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Thanks, looks like I have everything. Don't see any reason 1/64 ply will not work for a shroud when I decide to build it.
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Old May 24, 2014, 04:59 PM
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Good luck. Ends up that I don't have plans, so looks like a fair trade, thanks!
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Old May 24, 2014, 10:23 PM
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Canada
Joined Nov 2000
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Interesting project. I lusted for one.. Once.
But a TD is an 80 watt powerplant... Period!
Even this is a ~200 watt unit.
http://www.hobbyking.com/hobbyking/s...ed_199_8W.html
Be sure in what you build :-)
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