Gone and done it! - RCCanada - Canada Radio Controlled Hobby Forum
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Old 01-24-2006, 07:19 AM   #1
ken park
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Gone and done it!

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Yup! I've gone and done it! Yes Mr SMALL Ken Park has been bitten by the DF-bug! But staying in the SMALL world were I feel safe,warm and fuzzy. It not the size of your Fan but how you use it eh! LOL

Ok! Jim Brown and others Iam looking for advice from you experts! Iam looking for a good airframe to mount my 90mm 5 blade Toki .18 This is a wild little engine with a huge long rear pipe that hangs out the back! The manufacturer say's it should get 2.5-3.0 lbs of thrust.

So far I've been thinking about Shrinking down a Balsa USA Enforcer
I also like Rich Uravitch MiniWave EDF design - Only thing that's been bothering me is the balance point will be thrown off with the big pipe hanging out back?

The other question I have is about the lip of the intake? I see alot of the EDF guys have a nice rounded intake lip the Toki has none. Do I need to build a lip if the engine is hanging out in the breeze?
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Old 01-26-2006, 03:49 PM   #2
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Hiya Ken, welcome to the suck and blow crowd.

I'm afraid I'm not going to be much help. I've stuck with .91 powered DF's and don't know nuthin' 'bout them itty bitty ones.

Look up EasyTiger on RCU. I know he's done a lot of work with small glow powered DF and EDF.

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Old 01-26-2006, 04:22 PM   #3
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inlet lip

Ken, Yes, any air intake duct does require some rounding of the lip. If it was sharp, there would be increased turbulance & decreased efficiency of air flow (=less thrust).
no such thing as too fast!
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Old 01-27-2006, 08:09 AM   #4
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Morning Ken

A whole bunch of guys in R R/C Flyers are into ducted fans. Would you believe a four engine jobbie. I have 2 df kits but have been too busy with the turbine stuff. Send me a pm or email and I will provide some very active "itty bittie" contacts. {:>)

don dow
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