FPV Skyfun build - Page 37 - RC Groups
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Oct 25, 2012, 05:55 PM
Flying FPV from the lab.
aaron_gx's Avatar
Quote:
Originally Posted by ecworks
Don't know if this has ever been attempted before but I've just about completed my Skyfun conversion to 2 motors, the Twin Skyfun.

Will maiden it tomorrow. Runs great on the bench. Produces 4 lbs of thrust with a 3 cell battery and balances pretty good with a smaller battery pushed far back.
All up weight 2.5 lbs. with 2800 mah battery.

The motor mounts have a slight toe-out to allow the 8" prop some clearance from the fuselage and yet have the motors as close in as possible.

I'll see how it behaves in the air tomorrow.
Vertical takeoff!! Lol, that thing looks crazy!
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Oct 25, 2012, 05:58 PM
Registered User
aaron_gx, I saw in one of your photos you added vertical stabs to the skyfun wingtips. Did that make much of a difference? Im getting a little bit of jiggle especially when its windy.
Oct 25, 2012, 08:32 PM
Flying FPV from the lab.
aaron_gx's Avatar
Yes. It makes a huge difference in wag.
Night Ops (6 min 36 sec)
Oct 25, 2012, 08:39 PM
Registered User
Maidened the Twin Skyfun this afternoon.

https://www.rcgroups.com/forums/show...6#post23101030
Oct 26, 2012, 02:32 AM
Registered User

Twin Motor Skyfun project


2x Master Airscrew 9" 3 blade counter-rotating props with 6.5 lbs of total thrust (4 cell) was too much to resist so I skipped ahead and installed landing gear to allow for clearance and much fun with take-offs and landings:
Oct 26, 2012, 09:08 AM
Registered User
is there a problem with mounting the 2350KV motor on the stock mount?
Oct 26, 2012, 11:45 AM
Flying FPV from the lab.
aaron_gx's Avatar
im still flying my 2350 with the stock mount over a year later. I broke the stock mount on my first skyfun, in a crash.
Oct 26, 2012, 09:37 PM
Registered User
Quote:
Originally Posted by ecworks
Don't know if this has ever been attempted before but I've just about completed my Skyfun conversion to 2 motors, the Twin Skyfun.

Will maiden it tomorrow. Runs great on the bench. Produces 4 lbs of thrust with a 3 cell battery and balances pretty good with a smaller battery pushed far back.
All up weight 2.5 lbs. with 2800 mah battery.

The motor mounts have a slight toe-out to allow the 8" prop some clearance from the fuselage and yet have the motors as close in as possible.

I'll see how it behaves in the air tomorrow.
Maiden flight of the twin motor Skyfun w/landing gear
Maiden flight Twin Motor Skyfun w/landing gear (1 min 4 sec)
Oct 26, 2012, 11:09 PM
Registered User
Trying to figure out how to control the twin motor Skyfun during vertical launch.
The scientific method at it's finest...

The pretty powerful propwash over the elevons provides pretty good directional control if I can get the hang of it. May have to dial down the dual rate

Twin Motor Skyfun Vertical Takeoff testing (1 min 40 sec)
Last edited by ecworks; Oct 27, 2012 at 11:59 AM.
Oct 27, 2012, 11:55 AM
Registered User

Tri-Motor Skyfun


Twin motor Skyfun was a success. Bobbled the landing and broke the right motor mount.
Replaced it and pushed on to new frontiers.

Introducing...the Skyfun Tri-Motor:
Oct 27, 2012, 03:41 PM
Registered User
How about mounting that dog on that famous airliner?
Oct 27, 2012, 10:11 PM
Cleared for take off...
WitnessOnly's Avatar
Nice work EC, any plans to fpv it? Would be cool to see a full takeoff to landing flight with the rolling undercarriage
Oct 27, 2012, 11:44 PM
Registered User
Quote:
Originally Posted by WitnessOnly
Nice work EC, any plans to fpv it? Would be cool to see a full takeoff to landing flight with the rolling undercarriage
Not planning any FPV, I've got the Twin Raptor and the Twinstar for that. This is more of a proof of concept project using a previously almost destroyed Skyfun.
Oct 27, 2012, 11:47 PM
Registered User
Got the Tri-Motor Skyfun wired up and working.
Using (3) NTM Prop Drive Series 28-26A 1200kv / 250w
and 3 x Master Airscrew 3 blade 7" props w/ 3 x Turnigy Plush 30am ESC's

With a 4 cell it's generating over 5 lbs of thrust.
All up weight with 3300 mah battery: 2lbs 8 oz.

And yes, those are canards...
Last edited by ecworks; Oct 28, 2012 at 12:03 AM.
Oct 27, 2012, 11:56 PM
Registered User
Skyfun Tri-Motor bench test (0 min 19 sec)


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