| From: | "Chrysanthos Kanellopoulos" <xchrysk-at-otenet.gr> |
| Subject: | : New builder-to-be [TANKS] |
| Date: | Fri, 11 May 2007 22:44:00 +0300 |
| Reply-To: | tanks-at-rctankcombat.com |
|
For those who insist to use cordless drills for
motors, the right angle drives from angle grinders are a good
solution. THey are completey closed with metal gears. They have a ratio
1:3.5 for wheel axle and drill respectively, meaning they reduce speed 3.5
times, however that increases torque by 3.5 times.
They can be bolted directly to the hull, from teh
four screws of teh frame. They present some diffuclties. The axles
will slip inside the jaws of the chuck, unless they are filed to a hexagonal or
triangular section or unless they are pinned to the chuck(have tried that, but
with 10 mm dia axles, teh pins can only be 3.5 mm thick, and sometimes they snap
from excessive torque, no matter how hard steel they are made of is!). That's
one reason I switched to DeWalts. Joe, does the low speed in these drills result
in more torque? Is it a matter of gears in their gearbox?
Neil, you're building a second tank already? My
next tank is going to be no more than 80 cms long, with hinge tracks about 1.67
m. long. Each track will weigh 2.10 kg. Track weight is one of teh
parameters that affects overall size.
CHrys
|
