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Old Feb 14, 2011, 05:08 PM
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Dyess AFB
Joined Apr 2009
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I use a contact cement to glue my fan units in my planes. Holds nice and tight but I can "pop" them out if I need to.
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Old Feb 14, 2011, 05:12 PM
Kool Kats Fly RC!! AMA 30462
sonny1's Avatar
United States, CA, Baywood-Los Osos
Joined Feb 2009
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Quote:
Originally Posted by Matt Howard View Post
I use a contact cement to glue my fan units in my planes. Holds nice and tight but I can "pop" them out if I need to.
Great idea, I have some 3M 77; I'll give it a try, thanks!

Sonny
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Old Feb 14, 2011, 05:31 PM
Wonderfully Wicked
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Willoughby, Ohio
Joined Jan 2002
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Victapilot,

Here is what I can tell you on thrust, I just weighed the plane with a 4S2200 lipo and it is about 27 ounces. I ran it up and at ~500 watts I was at 1:1 thrust to weight. I need to charge the lipo to see what it is at on a full charge, my guess is about 32 ounces thrust.

I install the fan units with hot melt glue.

Don
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Old Feb 14, 2011, 06:03 PM
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United States, SC, Simpsonville
Joined Feb 2009
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Don - thanks! That will be a rocket!

The stock setup is about 29oz thrust at 482Watts and 48,000RPM according to the fan manual.

PS thanks again for all your work, it's great stuff!
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Old Feb 14, 2011, 06:04 PM
Kool Kats Fly RC!! AMA 30462
sonny1's Avatar
United States, CA, Baywood-Los Osos
Joined Feb 2009
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Quote:
Originally Posted by The Don View Post
Victapilot,

Here is what I can tell you on thrust, I just weighed the plane with a 4S2200 lipo and it is about 27 ounces. I ran it up and at ~500 watts I was at 1:1 thrust to weight. I need to charge the lipo to see what it is at on a full charge, my guess is about 32 ounces thrust.

I install the fan units with hot melt glue.

Don
Best idea yet, got that too! Thanks, keep the good info comin"!

Sonny
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Old Feb 15, 2011, 12:31 PM
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Dyess AFB
Joined Apr 2009
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Quote:
Originally Posted by victapilot View Post
Don - thanks! That will be a rocket!

The stock setup is about 29oz thrust at 482Watts and 48,000RPM according to the fan manual.

PS thanks again for all your work, it's great stuff!
I watt-metered mine (stock) today and on a fresh 4S 2200 40C pack I got 560 watts settling down to around 525 after about 30 seconds. Amp draw started at 36 amps and settled to 34-35.
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Old Feb 15, 2011, 02:57 PM
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United States, SC, Simpsonville
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Thanks! I was hoping for that - the fuselage duct is probably having some effect. The fan data in the manual is not specific to this plane, so it makes sense!
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Old Feb 15, 2011, 03:39 PM
Wonderfully Wicked
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Willoughby, Ohio
Joined Jan 2002
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I have a new 4S lipo coming, I recharged mine an it still was low on watt, it was only 3.4 volts per cell under load! No wonder I was only getting ~500 watts
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Old Feb 16, 2011, 03:51 PM
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United States, SC, Simpsonville
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I did a quick test with my 2900kv motor on 6S. It goes 700 watts at WOT, very scary. I know this is way over what they say the motor is good for, but it didn't smoke at least. For the test I used a fresh 4000 mah 45C 6S. It will not fit in the plane, it was just to get a measurement. Now I need to find a battery setup that fits, looks like a 2x1800x3s.

No hand launch for this one! I suspect the motor might not last long, but we'll see
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Old Aug 29, 2011, 03:07 PM
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United States, AR, North Little Rock
Joined Jun 2007
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no more info or video on this build don?
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Old Aug 29, 2011, 03:42 PM
Wonderfully Wicked
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Willoughby, Ohio
Joined Jan 2002
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Nope it tucked on the maiden when I went to WOT and destroyed the plane. I think this model has issues with high speed. I thought I posted that here, must have posted it in the other thread.

Don
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Old Aug 29, 2011, 05:17 PM
Kool Kats Fly RC!! AMA 30462
sonny1's Avatar
United States, CA, Baywood-Los Osos
Joined Feb 2009
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Gotta agree with Don, shortly after he started this thread I lost mine during the maiden flight while at WOT on the stock set up; lost all control authority at full throttle and nosed in. I've read of others having similar issues.

Sonny
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Old Aug 29, 2011, 09:59 PM
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United States, AR, North Little Rock
Joined Jun 2007
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just picked up another pnp 4s version for dirt cheap, guess i'll have to try and fix all the high speed problems before taking her up
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Old Mar 10, 2013, 09:10 PM
ARMY ATC (93C)
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United States, TX, Grapevine
Joined Jan 2005
1,114 Posts
Don, did you every get another one to build/fly? Do you still like the F-20, or you prefer your evader more? I liked the size of the F-20, as the evader is a bit smaller (but composite shell).
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Old Mar 11, 2013, 06:31 AM
Wonderfully Wicked
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Willoughby, Ohio
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No I never did. So can not really compare the two planes.
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