Evolution of a young hillclimber.

[3rdgendennis]

Hey Luke. If you'll make your car look like this, I'll deliver all the foam it requires.

Does that go for our tube frame car too?

[Chief Geek]

3rdGenDennis: Absolutely.

Thinking about it. Luke's car has a roof so it should look like this:


Your car should look like this:


;)

[Challenger392]

[quote="Chief Geek]

Thinking about it. Luke's car has a roof so it should look like this:)
[/quote]

I sure could use the downforce , especially on the rear end, but well start small we all know what happens when you add a pretty body to a hill climb car, its bound to get destroyed.

[sachilles]

It stopped raining long enough to try out the push to pass feature.


Works darn well. Rhonda and I nearly pee'd ourselves laughing the first time he tried it. Had to remove the cage to route the wiring. Actually think he needs the cage now. The thing is seriously fast. The speed and bumps caused some problems that need to be addressed. Batteries need to be secured better. I tried to datalog it, by tossing my phone in the back. Phone rattled apart tossing the battery aside, unsure if I got a usable log.
Initial test was a sucess

[STI NICK]

Thats great. I think you are going to have to figure out how to make the turbo a full time thing.

[sachilles]

The problem with making it full time is the gearbox is suppose to be too fragile for 24 volts. The initial torque on the gearbox seems to be the killer, as the gas pedal is just an on/off switch. So the turbo button is a way to make sure it doesn't get full torque at take off.
It really needs a variable throttle, and I haven't figured that out yet....and by the time I do, he'll be ready for a gas kart.
I'd agree that he'd be happy with full power all the time.

[KevinGale]

Lol, Sounds just like a bunch of other hillclimb cars. "I'm now making more power and the transmission/drivetrain can't take it."

[sachilles]

What do you expect from a subaru guy?

[Challenger392]

The problem with making it full time is the gearbox is suppose to be too fragile for 24 volts. The initial torque on the gearbox seems to be the killer, as the gas pedal is just an on/off switch. So the turbo button is a way to make sure it doesn't get full torque at take off.
It really needs a variable throttle, and I haven't figured that out yet....and by the time I do, he'll be ready for a gas kart.
I'd agree that he'd be happy with full power all the time.

Would it be simpler to just rig up some sort of soft start circuit? I know that's how some RC guys extend the life of cheap gearboxes. I'm no electronics expert so I couldn't tell you how it would work, but it might be worth looking into.

[dsldubn]

old electric cars, such as the city car that looked like a golf cart with some panels on it, used a very simple motor control...the throttle was set up in stages and was just varying voltage. pushing the pedal slightly gave you 24V, part throttle kicked it to 36V, and finally 48V...or something like that. Maybe it was controlling the field, I cant' remember. Either way, It can be as simple as relays and a position switch on the throttle.

real motor controllers are much more complicated, but I think a simple set up like the one i mentioned could be ok for the gator