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Old Dec 11, 2009, 11:10 PM
Renegade Fun Forever!!
rvincent's Avatar
Fontana, California, United States
Joined Jul 2004
27,653 Posts
These aren't 3D planes. Weight is a myth! It has nothing to do with speed only acceleration These er Jets! Not hovering foam trash take a look at CN's Cougar, or Sabre. Ask him if the additional POUND made any difference Another example was my Tam Jets A-4 at 19.5 lbs. It came off the ground in 75' and just easily flew away! At these power levels you need to ditch the weight Myth.
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Old Dec 12, 2009, 12:11 AM
efflux RC's Avatar
United States, CA, Santa Clarita
Joined Aug 2009
8,909 Posts
Here's the form for the EDF to motor fairing.
I'll glass it, trim it, and attach it with RTV silicone.
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Old Dec 12, 2009, 12:22 AM
Team White Llama!
gundamnitpete's Avatar
Joined Jan 2008
8,144 Posts
Quote:
Originally Posted by corsair nut View Post
broke at 62K!!!! :O geez man!
i think maybe that reading is from when after the shaft broke, at which point the motor has no "load" to slow it down.
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Old Dec 12, 2009, 12:35 AM
DELTAS RULE
corsair nut's Avatar
tehachapi, CA
Joined Jan 2006
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looks sweet gary. is that paper?
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Old Dec 12, 2009, 12:36 AM
efflux RC's Avatar
United States, CA, Santa Clarita
Joined Aug 2009
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Quote:
Originally Posted by gundamnitpete View Post
i think maybe that reading is from when after the shaft broke, at which point the motor has no "load" to slow it down.
The last 2 successful throttle ups were at ~62k RPM. I would discount that teeny spike at 63k as a glitch.
The rotor broke after that, at 2.05 min. The very last spike was the "no load" rpm.
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Old Dec 12, 2009, 12:41 AM
efflux RC's Avatar
United States, CA, Santa Clarita
Joined Aug 2009
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Quote:
Originally Posted by corsair nut View Post
looks sweet gary. is that paper?
Thanks.
Yes, but not for long.
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Old Dec 12, 2009, 01:34 AM
deltas are cool
AIR SALLY's Avatar
Tehachapi ,CA.
Joined Apr 2006
21,264 Posts
i should make that do dad with glass
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Old Dec 12, 2009, 01:48 AM
efflux RC's Avatar
United States, CA, Santa Clarita
Joined Aug 2009
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I mentioned this to you earlier. It is getting glassed. I coated it with thinned epoxy to stiffen it up a bit before I glass it.
I know the right way would be to make a plug, but for a one off test, this was faster.
Your the glass man rodger. if you wanna make 'em an sell 'em, go for it.
..............................

Here's the first layer of glass. I only have the .5 oz stuff on hand, so I'll do a few biased layers.
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Last edited by efflux RC; Dec 12, 2009 at 02:26 AM.
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Old Dec 12, 2009, 03:42 AM
deltas are cool
AIR SALLY's Avatar
Tehachapi ,CA.
Joined Apr 2006
21,264 Posts
make me a plug ....im too busy to start another glass project .....i spent all week trying to get my plug for the dynamax Nacelle done i never even touched any of my planes this whole week ....it is turning into a job of sorts ....wish i was retired
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Old Dec 12, 2009, 03:57 AM
efflux RC's Avatar
United States, CA, Santa Clarita
Joined Aug 2009
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Quote:
Originally Posted by AIR SALLY View Post
make me a plug ....im too busy to start another glass project
LOL...Make YOU a plug ???.....

.......that's what you told me when I asked ya to make me a set of ducts for my Byron F-20, for $$ Remember? ah ha..

I dont' just sit here with my thumb all day. I have weekly commitments, and plenty to keep me busy, being the house husband AND cooking every day for wifey when she gets home. Yup.

Besides, I've never made a plug (yet). It wouldn't hold up to your standards. Just look at all that extra epoxy on the first layer. Being flexible, I couldn't squeege it too hard. (the next two layers were much thinner)

So THERE...

Besides, your up as late as I am.
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Old Dec 12, 2009, 04:04 AM
deltas are cool
AIR SALLY's Avatar
Tehachapi ,CA.
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Old Dec 12, 2009, 04:13 AM
efflux RC's Avatar
United States, CA, Santa Clarita
Joined Aug 2009
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The fairing should be installed by tommorrow.

The only thing holding me up is a new motor shaft. If Bob get's me a couple, and I get the rotor to survive 5s, maybe we can fly it in the F-16 when the rain clears next week.
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Old Dec 12, 2009, 05:08 AM
efflux RC's Avatar
United States, CA, Santa Clarita
Joined Aug 2009
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The nearly finished piece is a conical cylinder (no cuts).
1 layer of epoxy coated paper, under 3 biased layers of .5 oz glass.

If LS puts a leading edge chamfer on the motor body, the major dia of the fairing could be reduced to the same dia as the motor can.
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Old Dec 12, 2009, 11:08 AM
hotrod builder
usmc_VTOL_mech's Avatar
United States, TX, Arlington
Joined Jun 2007
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Gary
DON'T think for a second I missed that comment about the hot glue and my thinking!
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Old Dec 12, 2009, 11:36 AM
Registered User
Denver, CO
Joined Nov 2007
1,294 Posts
RVincent--

Just thinking-- per given airframe--Lift must equal or exceed weight--Lift creates drag--More weight added means more lift needed which means more drag created-- More weight usually means more trim to create more angle of attack to create more lift which creates more drag--Drag, of course, effects speed. Weight also effects acceleration, as you mentioned. A ground based vehicle's top speed may not be as affected by weight except where related to rolling resistance. --Of course, added weight is probably all relative to size of aircraft and power system--an extra pound in your A-4 compared to an extra pound in my PH3 f-16, for example.
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