Hitec ranger II reciever and sail servo

[ThJester99]

Hello all, making a land sailer, got a radio at a garage sail, err sale. No
reciever its a hitec ranger II (2s), reciever needed is HP-2RNB , specifically
the HRCL1100(27MHz) for the 27MHz band. Also i guess i need a 27.145 crystal.
Tell me about sail servos, does the stick location determine location of he
winch type servos. like full up is all out and full down is all in? or is it up
for out and down to sheet in, stopping when you center the stick?.. also, are
the non winch types different. have no idea folks... thanks in advance..
Jesse

[res198kt]

Hi Jesse,

I'm glad to find someone else building an RC landsailer. I'm currently
building a kit landsailer designed by Kris Seluga, the LS-4 wing mast
version. http://www.rclandsailing.com/LS4.htm
Specifications:
Length: 58" (1.5 meters)
Beam: 39" (1.0 meter)
Max. shell width: 5 1/8"
Height: 64" (1.6 meters)
Weight: 3.5 lb (including electronics)
Sail area: Approx. 300 to 600 sq. in depending on the size of kicker sail
attached to the wing.

I am using a Futaba S3003 arm type sail servo because of it's massive
torque. I've learned from building rc sailboats that you can never have too
much torque available on the sail servo! However it's also quite big and I
had to custom build a servo arm so that I could fit it all inside the narrow
shell. I've never used a winch type servo but they look attractive because
of their greater linear inhaul over multiple turns. But they're also quite
expensive so I figure that I can always retrofit a winch servo if the arm
servo that I'm using doesn't provide enough inhaul length.

I also have and sail a full-sized "Fed5", US757, landsailer on dry lake beds
in the southwestern states: Blackrock, Ivanpah, Alvord, Jean, Winnemucca, El
Mirage are some of the dry lakes that I've sailed. On the full sized rigs we
let the boom or sail inhaul line out to luff the sail and yank it in through
a pulley system to tighten the sail in a tighter tack. So it seems most
realistic to me to have, as you say, full up as outhaul and full down as
inhaul. You may want to remove the lever spring centering system from the
transmitter on the sail control side so that you can set the inhaul/outhaul
and leave it there without it springing back to center. Futaba sells a
ratchet clip to replace the centering spring in their transmitters and I may
even use this on the steering control as well. On the full scale landyachts
we will almost always be steering very slightly downwind (pressure on the
sail tends to kick the rear wheels downwind) to maintain a straight-line
tack or beam reach and on a model it seems to me that the centering
mechanism on the transmitter would impair the ability to set an accurate
line. I've removed the centering on both controls on sailboat transmitters
because this also happens on boats, although a bit less. The ratchet holds
the lever wherever last set. Often, on the deserts in the full sized
dirtboats we will set the sail inhaul in a ratchet pulley that holds the
tension, let go of the inhaul rope, and lay back in the sun with eyes closed
to enjoy the ride! It doesn't take very long before you can just "feel" what
the landsailer is doing without having to see anything. In the Fed I'm
actually laying down on my back inside the fiberglass shell. I've done this
for over 8 miles at 70+ MPH at the Alvord Desert before. Way too cool!

Somebody correct me if I'm wrong but I think that land frequencies (and
water) are in the 75 MHz band and 27 Mhz frequencies are reserved for
aircraft control.

Mike


"ThJester99" <thjester99@aol.com> wrote in message
news:20030419173929.19055.00000237@mb-m17.aol.com...
> Hello all, making a land sailer, got a radio at a garage sail, err sale.
No
> reciever its a hitec ranger II (2s), reciever needed is HP-2RNB ,
specifically
> the HRCL1100(27MHz) for the 27MHz band. Also i guess i need a 27.145
crystal.
> Tell me about sail servos, does the stick location determine location of
he
> winch type servos. like full up is all out and full down is all in? or is
it up
> for out and down to sheet in, stopping when you center the stick?.. also,
are
> the non winch types different. have no idea folks... thanks in advance..
> Jesse

[Brian Telford]

"res198kt" <res198kt@verizon.net> wrote in message
>
> Somebody correct me if I'm wrong but I think that land frequencies (and
> water) are in the 75 MHz band and 27 Mhz frequencies are reserved for
> aircraft control.
>
> Mike
>
here in the UK 27Mhz is for land and waterbased models also some aircraft
use this frequency, 35MHz is soley for aircraft use, 40MHz only used for
marine models

Brian