701LikesXpress Arrow AT1
08-14-2022, 03:52 AM
#421
Tech Regular
- atleast at low load.Test with varying load would be more interesting, but it's impossible without specialised tools...
08-14-2022, 04:50 AM
#422
Tech Master
iTrader: (1)
To add. Free rev amp draw is a single indication of efficiency. There is still drive train inertia. That is what does it take to accelerate the drive train from zero. Both are very important to performance. I am a retired mechanical engineer. I designed drive trains on manufacturing equipment and in some cases we were looking for those numbers and design got interesting. Most of the time just give it enough HP to turn it fast enough.
Last edited by old_dude; 08-15-2022 at 04:42 AM.
08-14-2022, 03:06 PM
#423
I ran a similar test to Gigaplex but with standard and low loss (white) belts in my Xray T4 with a 21.5T Reedy S Plus motor. I can't remember the figures but the white belts gave a better result than the standard belts. It would be interesting if someone could compare the white belts to the Arrow AT1.
08-14-2022, 07:31 PM
#426
Well I got its virgin run in the books and Im gonna be honest, it didnt start out so well but by the end of the day I was very impressed.
I started with basically a kit setup.
7k in the diff - 400cst in the shocks - mugen 7p front and 6.5p rear springs (its all i had)
Every round was changes .... by the end of the day I ended up with this to make it work with minimal time between 2 classes.
The car def pushed on exit and power - not may driving so I swapped springs front to rear. Figured let it stand on the harder spring a bit more with exit.
I went to the 40mm rear camber plate and 38mm front camber plate. It helped a lot doing both of those things.
I put 1.2 bars on it front and rear instead of the kit 1.3 to let it roll more and that seemed to free it up quite a bit for me.
I also went to .5mm above each hub instead of raising the inner ball - quicker and easier then pulling the camber plates.
I did the front first and noticed I had better bite on exit on power and the rear got a little loose so I copied to the rear.
The big swing I didnt have time for and hate doing is playing with the pills.
I was center dot kit and think .5 down or even 1 down would have been very favorable. Ill try that next time.
I took some pretty good hits during the day too and broke nothing. Their kit plastics are pretty top line for their arms and hubs Ill say.
By the end of my day I had gotten the car after about a dozen runs down to the same lap times as my Mi8 on the same layout.
My personal opinion is dont give up out of the gate with this car. Work the track time with it, its gonna be great for its price and the stock classes.
I cant speak for mod just because I dont run it but I think the right driver and setup this car will surprise people.
One thing I did notice and forgot from the shaft days .... I had to increase my drag brake.
Im old school and favor using it but this car just wanted to roll when I lifted.
Hammer that throttle though and if you have traction it just gos.
I didnt notice anything weird with the torque, def not like the old shafties and mod motors.
I started with basically a kit setup.
7k in the diff - 400cst in the shocks - mugen 7p front and 6.5p rear springs (its all i had)
Every round was changes .... by the end of the day I ended up with this to make it work with minimal time between 2 classes.
The car def pushed on exit and power - not may driving so I swapped springs front to rear. Figured let it stand on the harder spring a bit more with exit.
I went to the 40mm rear camber plate and 38mm front camber plate. It helped a lot doing both of those things.
I put 1.2 bars on it front and rear instead of the kit 1.3 to let it roll more and that seemed to free it up quite a bit for me.
I also went to .5mm above each hub instead of raising the inner ball - quicker and easier then pulling the camber plates.
I did the front first and noticed I had better bite on exit on power and the rear got a little loose so I copied to the rear.
The big swing I didnt have time for and hate doing is playing with the pills.
I was center dot kit and think .5 down or even 1 down would have been very favorable. Ill try that next time.
I took some pretty good hits during the day too and broke nothing. Their kit plastics are pretty top line for their arms and hubs Ill say.
By the end of my day I had gotten the car after about a dozen runs down to the same lap times as my Mi8 on the same layout.
My personal opinion is dont give up out of the gate with this car. Work the track time with it, its gonna be great for its price and the stock classes.
I cant speak for mod just because I dont run it but I think the right driver and setup this car will surprise people.
One thing I did notice and forgot from the shaft days .... I had to increase my drag brake.
Im old school and favor using it but this car just wanted to roll when I lifted.
Hammer that throttle though and if you have traction it just gos.
I didnt notice anything weird with the torque, def not like the old shafties and mod motors.
Last edited by Robbob; 08-15-2022 at 06:04 AM.
08-14-2022, 09:59 PM
#427
Nice way to test efficiency with the motolyser...
08-15-2022, 03:03 AM
#428
08-15-2022, 08:46 AM
#429
That was the reason we nearly all used to run shaft cars back before lipo and brushless tech took over.
08-15-2022, 10:14 AM
#430
After some initial testing, having the optional camber plate such as 40 or 38 for sure beneficial to the chassis handling.
08-15-2022, 10:27 AM
#431
08-15-2022, 10:33 AM
#432
08-16-2022, 01:01 AM
#433
Tech Apprentice
08-16-2022, 09:53 AM
#434
so the stock must be 39mm between two available option camber plates
38mm plate allow to run longer camber link which will get less camber gain and easy to drive /40mm plate just the opposite..most likely used for carpet set up
08-16-2022, 04:04 PM
#435
from what I seeing ..there are two option camber 38mm and 40mm
so the stock must be 39mm between two available option camber plates
38mm plate allow to run longer camber link which will get less camber gain and easy to drive /40mm plate just the opposite..most likely used for carpet set up
so the stock must be 39mm between two available option camber plates
38mm plate allow to run longer camber link which will get less camber gain and easy to drive /40mm plate just the opposite..most likely used for carpet set up