View Full Version : "Sky Arrow" on GWS floats

06-30-2006, 03:23 AM
Just completed the Hacker "Sky Arrow" modifications:

Installed a GWS Outrunner brushless 2201-18T motor
Cox 5 x 3.5 3 blade prop
GWS 21" floats
3s1p 1500mah lipo
Installed a Deans Mini Antenna

AUW now 24 ounces
Runs at 44 watts at 4 amps, wide open throttle

Prop mounted facing forward, motor runs in opposite direction for pusher mode.

Cockpit canopy interior sprayed gloss black.

Initial taxi test revealed adequate power but the float mounting is too flexible causing the plane to push forward and down, could not get up on step. More rigidity required.

Waiting for an ESSKAY 400XT motor and a 6.2" 4 blade VarioProp, which will be more powerful combination and interesting to evaluate.

Neat looking plane, can't wait to see it ROW.


07-01-2006, 12:55 AM
Hi Don,

I looked all over the Internet for this airplane. I can find build articles from 4 years ago, but no current distributor for this plane. Any ideas?


07-01-2006, 03:29 AM
Hi Eric,
I had the same problem.
The plane is no longer available from Hacker or Hobby Lobby.
Even called Hobby Lobby to see if one was on a shelf in a back room, no luck there.

I posted a "WTB" (want to buy) listing in the "For Sale & WTB" sections of Wattflyer and Ezone.
Had two replies one from a gentleman is Switzerland and one from the previous owner of the one I've been writing about.

Almost made a deal with the gentlman from Switzerland. If you are serious I will find his e-mail address for you. He had a tempting proposal.
He would send me a list of items that he would like me to buy and ship to Switzerland in exchange for the plane.

Neat arrangement, but I found one in California instead.

Send me a PM if you wish to follow through.

This is one neat looking plane, especially with the cockpit canopy painted black inside.

Hope this helps,

07-02-2006, 02:35 PM
Installed the VarioProp and conducted Wattmeter test.

Motor: GWS 2201-18T
Battery: 3s1p 1500 mah lipo

Prop diameter: 6.25"
At maximum high pitch 6.00" = 109 watts at 11.5 amps
At minumum low pitch 2.50" = 105 wats at 10.7 amps

The VarioProp pitch is adjustable from 2.5 to 6.0 inches in 0.25-inch increments, but I just did the test at maximum and minimum.

There certainly is a huge watt difference between the Cox 3 blade that only tested out at 44 watts and 4.0 amps. Full power runs could not get the Sky Arrow up on step.

Will report on water tests soon.

Happy Flying,

03-20-2007, 02:36 PM
Hey guys, I just ordered this beautiful airplane; now that you have some experience with it, what engine - prop - esc - battery do u think is good to use ?

Another question, Do u know where to get floats and skis for it?

Thanls a lot!

04-06-2007, 01:15 AM
Ciao Verona Flyer,
I used the GWS 21" floats and a 1500 3s lipo for the brushless motor.
If you use a brushed motor you can use NiCD or NiMH batteries,
Here's a video of my first successful maiden: