Craig,
I am buildingthe third E-Tow Plane. It is a
Roedel Sky Wing tow plane, very similar to the Graupner Taxi 2400 offered by
Hobby Lobby, with an Axi 5330/F3A, 23 x 11 prop, Jeti 90 ESC, 10S4P 8,000 LiPo.
Performance should be similar to your Hangar 9 Super Cub.
I don't think your tow release is overkill - I use
at least 150 ounce servo for my tow plane releases - theother half of
success is astrongrelease mechanism; 200 ounce servos on tail
surfaces and 110 on wings.
I was going tobring a Do-27 but it will only
tow 3 meter size.
After years of towing with gas engines this will be
something new!
I will be on Channel 26 or 58.
Bruce DeVisser
San Jose, CA
- Original Message -
From:
Craig Allen
To: soaring@airage.com
Sent: Tuesday, August 01, 2006 1:45
PM
Subject: [RCSE] Electric Tug info
I have received a lot of request for info on the Tugs we will be using
for our event so I am posting to the group. Here is info on two of the tugs
that will be at our event. At this time I do not have info on the third
one.
First off this is not a cheap endeavor.
Brian Chan is currently building a 1/4 scale Wilga using a monster motor
provided by Steve Nue that will turn a 27 inch prop pulling over
100ampsusing 12s4p thunder power batteries. It should have no problem
pulling up a 30 pound glider at a cost of around $3,500 or so.
My Tug is a Hanger 9 1/4 scale Super Cub ARF( No longer Avalible)
that easily pulls up my brothers 20 pound very draggy scale gliders. I'm using
an Axi 5330/24 Spinning a 22/12 prop with a Jetti 90 amp controller.
Batteries are Thunder Power. I use 3 packs of 3s4p wired in series giving me
8000ma. I do this for several reasons. 1. It is much easier to fit and balance
the plane with three packs then one or two. 2. I can easily use the packs in
other planes of various sizes so they are not just siting around when we are
not aero-towing. But the real advantage is I have 3 Astro Flight
chargers, I can charge all three batteries at once at 6 amps. It
only takes about an hour to have all three of them ready to go again. So by
having two sets of 3 packs... Yep.. 6 batteries total. You can tow all day
without interruption with this set up.
The only Mods I made to the Super Cubwere using the largest Balloon
tires I could find and for safety reason I did the following.
Icut the counter balance part of the rudderoff and fixed it
in place to prevent thetow line from snagging.
I might of gone a little overboard with the tow line release, I installed
a HS-6985 HB digital servo with 172oz of torque on a 2 to1 bell-crank system
so in affect I have 344oz of pulling power on the pin.
I lost my first tug to what I believe was a receiver battery coming
loose while doing some acrobatics.So on my latest one I installed a duel
5 cell flight pack system with separate on-off switches and connections to the
receiver, and I don't do acrobatics any more :-)
I will be happy to answer any questions you might have.
Sincerely
Craig
