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Old Jan 09, 2012, 10:19 PM
1400 watt RW Zephyr
matwelli's Avatar
Taranaki New Zealand
Joined Sep 2003
1,335 Posts
My old skool zeph 54, covered in rite weave ( took almost 2 cans of 90) does about 100 MPH on 1400 watts, they ain't designed to go fast - I think most of the power goes into noise
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Old Jan 09, 2012, 11:46 PM
Expo is built into my thumbs
Hance's Avatar
USA, ID, Niter
Joined Jul 2008
4,479 Posts
Quote:
Originally Posted by matwelli View Post
My old skool zeph 54, covered in rite weave ( took almost 2 cans of 90) does about 100 MPH on 1400 watts, they ain't designed to go fast - I think most of the power goes into noise
My demon makes LOTS of that wonderful noise. I am still hoping CK comes out with a Demon V2 based on the new foam. If the new one lost some weight and I used my same 2400 watt power system it should be screaming fast.
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Old Jan 10, 2012, 01:05 AM
never mind the boll⁣⁣⁣ocks
brosius85's Avatar
Australia, NSW
Joined Dec 2010
1,256 Posts
looking a t the wreckage today i think i needed more thought put into the main spar. more gorilla with less water and sandpaper the spar first.

and riteweave would have been good too, but you can't use 90 on this foam. would have to just be gorilla
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Old Jan 10, 2012, 01:18 AM
1400 watt RW Zephyr
matwelli's Avatar
Taranaki New Zealand
Joined Sep 2003
1,335 Posts
could you get away with 3M77 or ados F2 ?

my zephy has twin 6mm main spars, and each wing has a 6mm tube as well
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Old Jan 10, 2012, 03:35 AM
never mind the boll⁣⁣⁣ocks
brosius85's Avatar
Australia, NSW
Joined Dec 2010
1,256 Posts
yep my ZII has 2x 6mm spars , i just needed to use more gorilla. and ritweave...... or just be nicer to the poor airframe not trying to huck it about with 2000w at the same time
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Old Jan 10, 2012, 08:17 AM
Victim of C.D.O.
murdnunoc's Avatar
United States, TX, Lubbock
Joined Oct 2007
4,081 Posts
The new foam can't take 90?!
uh oh.

One possibility if you did want to weave it would be water-based contact cement. Same type of stuff used on counter top laminate and flooring, but without the nasty dissolvy stuff.
You could just brush it on instead of spraying, then use the spreader card to smash the weave and smooth it.

Or tack it down with Elmer's water-based spray adhesive. Then give it CK's "extra love" treatment with PU glue that's continuously wiped and smoothed till it cures.
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Old Jan 10, 2012, 10:27 PM
never mind the boll⁣⁣⁣ocks
brosius85's Avatar
Australia, NSW
Joined Dec 2010
1,256 Posts
i think i am more suited to a demon

but life just got real busy i wont have time to fly for a fair while

and just this morning my big heatsink and sport props arrived...... grrrrr
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Old Jan 15, 2012, 01:06 AM
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Peter M's Avatar
Newcastle, New South Wales, Australia
Joined Sep 2007
2,366 Posts
I Think I'm Ready To Maiden

It always takes twice as long as you think it should doing those last few jobs!

Ready to maiden this week with Mega 16/40/1.5SC on 6 cell 5000's gives a RTF weight of 2.03kg including the 3 oz of lead I installed to give me a conservative CG.

I was pretty pleased with myself as my first Demon with the same motor weighed 2.17kg and that was with smaller 4000 batteries!

With a 6.5x5 APC Pylon prop this will draw, straight and level, just over 100amps or about 2160 watt so I will only be able to do short WOT bursts.

I can always subsitute a 4 cell 4000 for one of the 3 cell 5000's to run it on 7 cells and a 6x4 on a slightly higher kV motor for laughs too but the intention is to run 8 cell 4000's most of the time with another lower kV motor.
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Last edited by Peter M; Jan 15, 2012 at 01:20 AM.
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Old Jan 15, 2012, 03:04 AM
never mind the boll⁣⁣⁣ocks
brosius85's Avatar
Australia, NSW
Joined Dec 2010
1,256 Posts
great job peter, it looks awesome.

make sure we get some video!
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Old Jan 15, 2012, 03:40 AM
Registered User
Peter M's Avatar
Newcastle, New South Wales, Australia
Joined Sep 2007
2,366 Posts
Thanks Ambrose!

Have you ordered your Demon yet?

Video? Lets see how we go first!
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Old Jan 15, 2012, 07:40 AM
Why the dirt on the wings?
moparmyway's Avatar
New York
Joined Jan 2009
4,982 Posts
Peter,
I think that ESC will be just fine, its the motor I am worried about.
That nice MEGA sticker insulates the can from dissipating heat.
Do you have room for a heatsink between the 2 motor clamps ?

Is it just laminated ?
Did you use Riteweave ?
How many and what size spars ?
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Old Jan 15, 2012, 01:57 PM
Registered User
Peter M's Avatar
Newcastle, New South Wales, Australia
Joined Sep 2007
2,366 Posts
Hi Mopar,

The intention is not to push this motor and just to get it flying so I haven't worried about a heatsink at this stage. There is room for a heatsink between the mounts - I just have to cut one to lenght. 'Spose I could alway fit one tonight (and pull the sticker off as well!). Thanks Mopar, better safe than sorry I guess!

It is a traditional build consisting of main spar, surface spars, riteweave, 90 and laminate. I have also installed a top surface cf spar to compensate for the loss of the use of corflute for the hatch covers: http://www.rcgroups.com/forums/showp...ostcount=11297

The weight loss over my last one has been mainly the minisation of the need to add lead and very thin paint!

Regards
Peter
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Last edited by Peter M; Jan 16, 2012 at 02:05 AM.
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Old Jan 19, 2012, 11:02 AM
You down with EPP?
johnnyrocco123's Avatar
Houston, Tx
Joined May 2009
6,754 Posts
Mega 16/40/1.5rc

Clique,

How many runs did you get with the Mega 16/40/1.5rc on 6S with the 6.5x6.5 prop? Did you get any numbers from the flight(s) watts, amps...


I saw this on a video for m SEFF. I believe it was strapped onto a Demon.


Trying to get some max figure for the motor. I currently fly it on 4S with a
7x6 gas prop.
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Old Jan 19, 2012, 01:53 PM
Registered User
GryphonRCU's Avatar
United States, CA, SF
Joined Mar 2008
3,824 Posts
Quote:
Originally Posted by johnnyrocco123 View Post
Clique,

How many runs did you get with the Mega 16/40/1.5rc on 6S with the 6.5x6.5 prop?


Where did you get 6.5X6.5 on 6S?

Put up a link!



Gryphon
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Old Jan 19, 2012, 05:27 PM
Victim of C.D.O.
murdnunoc's Avatar
United States, TX, Lubbock
Joined Oct 2007
4,081 Posts
Johnny,
What plane is it for this time?

Hotliner?
Pylon racer?
3D with a gearbox?
Helicopter?
Drag race car?

You might have better luck getting advice in the threads for the plane you're looking to run.

Try 8x8 on 6S.
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