This makes me smile!!! Paul H.
-----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Frank Pittelli Sent: Saturday, January 02, 2010 11:56 AM To: [email protected] Subject: Re: [TANKS] Status of Brummbar Speed Controllers? Thomas Lum wrote: > I was wondering how the scooter speed controllers worked out on the > T012? Any field test results? They worked without a problem during the last Gettysburg battles, which is our only battlefield experience to date. However, I plan on deploying some more vehicles with scooter motor controllers in 2010 which is an indication of how well I think they work. At $20-$25 for each 350W-500W controller they fit well into my "beefy, cheap and repairable" approach to system design. For much less the price of the high-amp commercial products (less than $100), I'll be using two scooter controllers, 4 auto relays and a circuit board to provide fully proportional speed control. With the money I save, I'll have a nice stockpile of spare parts in my box. More importantly, since the system is modular, if something does fail (on any vehicle) I can replace any individual component "in the field" in just a couple minutes with only a screwdriver. The only significant drawback of the approach is that the solution requires more space in the vehicle than a fully integrated commercial speed controller because the scooter controllers have their own heat sink cases. On the other hand, they have much more surface area for cooling. If space is a major concern, the scooter controllers can be replaced by a pair of SSRs and heat sinks, resulting in a clone of the Anvilus controller design ... which has been successfully used in dozens of battles by various vehicles for over 5 years. (In fact, the scooter motor controller approach is the evolution of the Anvilus design using modular components. Joe led the way with the development of some circuits to control the controllers, I've simply been running with the ball he passed to me, making things more modular.) The modular approach also requires more control wires between the circuit board and the relays/controllers, but the control wires are all small gauge. A complete set of scooter controller components will be on display at the upcoming Tank Expo 2010 which is tentatively slated for Saturday, Jan 16 in Annapolis. Frank P. -- You are currently subscribed to the "R/C Tank Combat" group. To post a message, send email to [email protected] To unsubscribe, send email to [email protected] Visit the group at http://groups.google.com/group/rctankcombat -- You are currently subscribed to the "R/C Tank Combat" group. To post a message, send email to [email protected] To unsubscribe, send email to [email protected] Visit the group at http://groups.google.com/group/rctankcombat
