RC-Monster Forums - View Single Post - LiteSpeed: My speed record attempt car...

Dagger Thrasher · 03.22.2008, 08:44 PM

No prob man, I'm all for input...especially form experienced people like yourself (I've seen your car on RCZ...what a piece of kit!). I answer to your points though:

1. I'll most likely be using a GY401 gyro, with as fast a steering servo as I can get hold of. I'd love to use a 611, but that's just simply out of my budget. I know what you mean by steering wag though...strangely, you actually get a similar thing happen on helicopters if you have the gain set too high; the tail wags. Obviously the 401 isn't quite as quick as the 611, so if I do get any issues, then hopefully turning the gain down will help.

2. 2WD...yep, it could cause real problems lol. I'm planning on using similar BSR tyres to what you've used before, but in terms of acceleration....well. I'm just gonna have to set up a nice, very smooth throttle curve up on the React and accelerate as gently as I possibly can. The React has a lot of useful mixing capabilities too, so I might be able to set up the steering to reduce its travel as throttle input increases which could help with control. By the way, I hope you don't mind my asking...but which of the BSR tyres would you recommend?

3. That's a good point. At the end of the day, the 4500W figure is really the absolute maximum that the system could deliver. As you know, the motor will only suck as much current (and so output the watts) that are needed to get it to a particular speed. Making the car ligher should reduce this figure, so that shouldn't be a problem. :)

4. I totally understand what you mean here too. The LiPos, motor etc are of course going to add weight and I am putting in what I think is the best power system for this chassis, but I may as well make the chassis as light as possible. The lighter the car, the less work the power system has to do. I'm not going overboard on it being lightweight in terms of price (the carbon chassis kit was barely any more expensive than the stock items lol), but if there's weight to be saved without much cost, I'll do it.

Thanks for your input man...it's given me a lot to think about (especially traction wise!) :).

	(#26)
Dagger Thrasher I have no idea what's going on Offline Posts: 464 Join Date: Jan 2005 Location: UK	03.22.2008, 08:44 PM No prob man, I'm all for input...especially form experienced people like yourself (I've seen your car on RCZ...what a piece of kit!). I answer to your points though: 1. I'll most likely be using a GY401 gyro, with as fast a steering servo as I can get hold of. I'd love to use a 611, but that's just simply out of my budget. I know what you mean by steering wag though...strangely, you actually get a similar thing happen on helicopters if you have the gain set too high; the tail wags. Obviously the 401 isn't quite as quick as the 611, so if I do get any issues, then hopefully turning the gain down will help. 2. 2WD...yep, it could cause real problems lol. I'm planning on using similar BSR tyres to what you've used before, but in terms of acceleration....well. I'm just gonna have to set up a nice, very smooth throttle curve up on the React and accelerate as gently as I possibly can. The React has a lot of useful mixing capabilities too, so I might be able to set up the steering to reduce its travel as throttle input increases which could help with control. By the way, I hope you don't mind my asking...but which of the BSR tyres would you recommend? 3. That's a good point. At the end of the day, the 4500W figure is really the absolute maximum that the system could deliver. As you know, the motor will only suck as much current (and so output the watts) that are needed to get it to a particular speed. Making the car ligher should reduce this figure, so that shouldn't be a problem. :) 4. I totally understand what you mean here too. The LiPos, motor etc are of course going to add weight and I am putting in what I think is the best power system for this chassis, but I may as well make the chassis as light as possible. The lighter the car, the less work the power system has to do. I'm not going overboard on it being lightweight in terms of price (the carbon chassis kit was barely any more expensive than the stock items lol), but if there's weight to be saved without much cost, I'll do it. Thanks for your input man...it's given me a lot to think about (especially traction wise!) :).