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Old Jan 22, 2009, 11:03 AM
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Tam Jet F-16 w/ Dyn-e-max

Has anyone considered a Tam F-16 with the Dyn-e-max? If so, would the ducting need to be reworked to fit the larger fan or do you think it would get enough air with the stock ductwork? The TJ100 is very impressive in this airframe but the sound is not as good. I normally would use what is recommended by the manufacturer, but I see the Stumax has flown it very well and also has a good sound to it. Thanks
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Old Jan 22, 2009, 12:33 PM
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how bout something in the middle like a E-turbax? and the rpm is lower with a lot of these fans so ducting isnt as much a "gotta have". The turbax is a great price and works like a charm.

Barry
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Old Jan 22, 2009, 04:46 PM
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I just picked one up for the same purpose. In my opinion, the stock duct work would not even come close to providing enough air flow for the Dyn-E-Max unit. However Tam does sell ducting for a 120 mm fan which would. The only real draw back is that in order to place the Dyn-E-Max fan into the airframe, one would need to do a lot of cutting on the formers around the wing area and once you get the fan to fit you may run into clearance issues with the main gear. Please keep in mind that I am no expert and pretty new to the electric jet segment of the hobby.

Gene S.
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Old Jan 22, 2009, 06:07 PM
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Gene, You raise some good points that I haven't even considered. I wish Tam would chime in maybe, but I suppose he would rather we use his fan instead of changing things up. I have several Dynamax fans that I could convert.
This is why I asked the question. Hopefully we can get some better ideas on what will actually be required to do this. Thanks
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Old Jan 22, 2009, 06:25 PM
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I hadn't considered them either - I talked to Tam about a Dyn-E-Max conversion but he didn't say anything about the mounts and formers - probably because may not have been familiar with the size of the fan unit. Thats why I bought the plane with the ducting for the 120mm fan. I figured I would have to make some modifications but was unaware of how much I would have to cut in what I feel are some pretty critical areas. I feel a person could probably cut the formers then reinforce the more critical areas with carbon fiber but would still be concerned about the clearance between the top of the gear and the outer shroud of the fan. It would be a very close fit. I thought I might do a little more indepth research tonight on the ducting also.

Gene S.
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Old Jan 22, 2009, 06:32 PM
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I'll do the same and maybe we can compare notes.
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Old Jan 22, 2009, 06:34 PM View Post
k_sonn
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Old Jan 22, 2009, 06:38 PM
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Kirk;
I will try to get some pictures tonight but it appears that the ducting is the correct size for the fan. The real difficulty is trying to shoe horn it in where it needs to go.
Thanks for the info though. (i'll take all I can get )

Gene S.
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Old Jan 22, 2009, 06:45 PM
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Kirk ,
Tam has the ducting for 120 mm for his F-16 and A-4

That from when he was running DS-94 in all his stuff

Ron
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Old Jan 22, 2009, 06:45 PM
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There was purpose built 120mm ducting for Ds-94 for over a year for the F-16, that before TJ was in production. Since its 120mm it has full FSA for any 120mm fan front to back.


Barry
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Old Jan 22, 2009, 06:47 PM
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Wow, so I guess when I asked for my ducting to be built for the 120mm fan with an adapter for the 100mm fan, no one was listening.

Kirk
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Old Jan 22, 2009, 06:54 PM
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I know feeling! kinda like when I've said over and over that doesnt matter what the actual lip of an F-16 is the only FSA you can have is the area above nose gear. Ever look at yours and see that the inlet is huge yet every square in is used up right there above that nose gear. so at 107mm area on the skymaster how can you squeeze 120mm through there? And either way the reason for a duct is to make an efficient path, so why make it huge then go down when fan can't process air, if its for 120 it has to be for 120 front to back. thats why lot of inlets if there is the space even have damn's up front to prevent the filling of air right away that wouldnt be processed anyway.

Barry
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Old Jan 22, 2009, 06:55 PM
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Oh and a link to vid for old ds94 setup

http://www.rcuvideos.com/video/Tamje...F-16-DS-94-3-7


Barry
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Old Jan 22, 2009, 07:05 PM
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And not to completely duck the blame! lol It is possible I wasn't listening as much as I should have cause thinking back I didn't hear you say thanks for working on that free duct for me! lol

Barry
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Old Jan 22, 2009, 07:59 PM
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The inlet mouth on the front the F-16 is not even close to big enough for ANY of the 120mm and larger fans. I have the F-16 setup with DS-94/Lehner. The best ducting ever made for that setup was by Mike Donovan, and that was only 80% FSA for the DS-94. Measure the size of the "mouth". It's not happening with this particular F-16 for 100% FSA unless you did some major cosmetic surgery.
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