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Dec 11, 2009, 10:10 PM
Renegade Fun Forever!!
rvincent's Avatar
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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Dec 11, 2009, 11:11 PM
efflux RC's Avatar
Here's the form for the EDF to motor fairing.
I'll glass it, trim it, and attach it with RTV silicone.
Latest blog entry: Updated blog May 2017
Dec 11, 2009, 11:22 PM
Team White Llama!
gundamnitpete's Avatar
Quote:
Originally Posted by corsair nut
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.
Dec 11, 2009, 11:35 PM
fly like an EAGLE ;)
corsair nut's Avatar
looks sweet gary. is that paper?
Dec 11, 2009, 11:36 PM
efflux RC's Avatar
Quote:
Originally Posted by gundamnitpete
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.
Latest blog entry: Updated blog May 2017
Dec 11, 2009, 11:41 PM
efflux RC's Avatar
Quote:
Originally Posted by corsair nut
looks sweet gary. is that paper?
Thanks.
Yes, but not for long.
Latest blog entry: Updated blog May 2017
Dec 12, 2009, 12:34 AM
deltas are cool
AIR SALLY's Avatar
i should make that do dad with glass
Dec 12, 2009, 12:48 AM
efflux RC's Avatar
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.
Last edited by efflux RC; Dec 12, 2009 at 01:26 AM.
Dec 12, 2009, 02:42 AM
deltas are cool
AIR SALLY's Avatar
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
Dec 12, 2009, 02:57 AM
efflux RC's Avatar
Quote:
Originally Posted by AIR SALLY
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.
Last edited by efflux RC; Dec 12, 2009 at 03:03 AM.
Dec 12, 2009, 03:04 AM
deltas are cool
AIR SALLY's Avatar
Dec 12, 2009, 03:13 AM
efflux RC's Avatar
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.
Latest blog entry: Updated blog May 2017
Dec 12, 2009, 04:08 AM
efflux RC's Avatar
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.
Latest blog entry: Updated blog May 2017
Dec 12, 2009, 10:08 AM
hotrod builder
usmc_VTOL_mech's Avatar
Gary
DON'T think for a second I missed that comment about the hot glue and my thinking!
Dec 12, 2009, 10:36 AM
Registered User
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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