Hello
Polanik,
I am going to build
that tank, no matter how hard is to get parts. I just got to buy them in other
countries then Norway.
I am going to
Poland in Christmas so I will check
Praktiker and see what they got.
So I will look to
those motors, I hale also opportunity to buy real wheelchair motors from
USA for a nice price of money, but
I may also buy scooter motors.
The thing is that I
am planning 1/6 scale Leopard 2A6, and I think the weight of this tank will be
almost 100kg. So I can’t have to week motors.
All true I think I
just buy a speedcontroller first and 2 scooter motors and just test
them.
Are you from
Poland? Polanik sounds like
polish…
Martin
From: tanks-admin-at-rctankcombat.com
[mailto:tanks-admin-at-rctankcombat.com] On
Behalf Of Chrysanthos Kanellopoulos
Sent: Thursday, November 09, 2006 3:55
PM
To: tanks-at-rctankcombat.com
Subject: Polanik. New.
[TANKS]
try to use drills of 18 V of 24 V
at 550 rpm or undervolted / adjusted with a trimmer to go down to 350-400
rpm
and angle drives as
differentials :
I've found good quality angle
drives for euro 20. The diameter of their axles is about 8-9 mms Would that be
thin for a vehicle's weight of 40-50 kgrs? I don't know.
I made my plans fromscaling up a
1/72 scale model. It is 1/7 th scale. It is about 41 inches long not including
barrel. I didn't go 1/6 th becouse it would have been huge. The motors I am
going to try are 18v drill motors to a kiddy car
gearbox.
----- Original Message -----
Sent: Tuesday,
November 07, 2006 7:37 AM
Subject:
availability what materials
I know what you mean about
non-availability of materials. It is not easy to get these motors for
wheelchairs or kiddiecars as separate spare parts. When I was looking
for similar motors, at some point I thought it would be more convenient to buy
a whole kiddie car, use it as it is, fix an RC receiver to control its
steering system and replace the upper hull with something that looked
like a British Daimler or Ferret made out of polyesterine and painted flat
desert yellow. It would have been easier than finding the motor only!. That's
still an idea to consider!
Try to contact the european
comrade tankers in:
and see how they got ahold of
these large motors.
These are 12V drills, but you can
find cheap Chinese (about 50 euro each) 24 V drills, with 1440 rpm on the
chuck. They can be found in Praktiker european
multi-mega stores. When you reduce this speed to 500 rpm, the speed of the
tank in scale 1:6 will be about 7-10 kms/h while the torque will be tripled!
These drills have two gears/ speeds. The low gear gives you 550 rpm. You
will have to devise your own differential though, or find one that is readily
available in places or factories that sell
gears.
If you bust them, you pay 50 euros
and buy new drills. I never did have to do that (Makita drills cost at
least 250 euros each. Makita 12V motors alone cost 40 euro each and the
gearboxes about 50!!!)
One disadvantage of cordless
drills is that they get heated very fast, but you'll have to live with this or
devise an effective cooling system: fans and aluminium sinks. If you
drive your tank in a cold weather, with temperatures below 10 degrees C, the
motors will cope with the heat. That's if your fans blow air with a
temperature of 5 o C and the entire hull is also cold. Think positive:
Luckily, Norway is a cool and convenient country to drive these little
monsters!. Perhaps all of you comrades think this is funny, but the motors
don't cool down as effectively in a heat wave and I know this from
experience. How good are fans that blow air with a temperature of 35-40
deg. C onto your motors? You will also discover that without an
opponent, driving an RC tank for about 20 minutes is a lot of
time, so there is no time to burn the motors. My motors, run with 6 Amph, once
got so hot, that the little paper and plastic tags on one of them (with type,
voltage etc) actually burnt. I saw the smoke and panicked !!! Nothing
happened to the motors though I replaced one of them later, just in case. Use
batteries with few Amph ( 3.6) that you can change quickly with new ones, so
the drills' motors won't burn.
I am just saying you should always
see the glass as half full, build your own tank whatever it takes, take
advantage of the opportunities and see the compromises as "adoptions".
__________ NOD32 1.1859 (20061108) Information
__________
This message was checked by NOD32 antivirus system.
http://www.eset.com