Model Forum / Radio Controlled / Water Models / April 2005

Hello, I'm a student at the University of Economics in Vienna, Austria;
Faculty
"Entrepreneurship & Innovation" and together with my colleagues we
conduct a Lead User project. In a lead user projrct we try to identify

Would like to purchase 1:200 (1:192) scale warship kits. There used to be
(?) a number of British ones available (I bought them from Midway
Models--Leicester) but they do not seem to carry them anymore. Also would
like Aeronaut (German) same scale. Please let me know if you know ...

Does anyone have any information on adding the fourth channel to HiTec DCX
type receivers? I have found a link to pulling 7 channels out of the older
Ranger type radios but nothing on the newer ones
In case you're interested, the link for the Ranger conversion is

Can you tell me how to prevent water going in through the drive shaft?
This will be under water line and submersible area.
Is there any special water proof bearing available?
Or I can buy a motor that already have this buildin?

Can you tell me how to estimate motor speed in rpm and torque?
I just want to make a simple and easy estimate so that I know what kind of
motors in the store or catalog to compare with? Thank you.