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03.15.2011, 05:41 AM
just thought i might update this. The following stuff is once again copied from the original thread.
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I have now actually finished the new setup. It is ready to be installed onto the car. It may not be the prettiest but it'll work (or at least i hope it will...).
However. If/when/whatever i get a mill i will probs redo all these plates so that they are very precise to about the 0.02mm (i know, talk about anal) then i'll be happy. Also i can then do lots of stuff with the plates that i couldn't before.
If i do use a mill to redo the plate i will also redo the 'LST XXL' on the bottom of the lower plate but it should look about 100 million times cooler.
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Just finished getting my other (blue) LST up and running. I am running a feigao 580L 1643kv motor. It is about the same diameter (minus fins) but is a little shorter. For the ESC i am currently running my Mamba XL as it was out and easy to install. Servo: HS-7955TG
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o over the past two nights i have finished LD's old LST and also installed my new setup into my original LST. Everything looks good and i've also made a rear motor brace. It loos like 5hi+ but it works and i couldn't be screwed being in the shed for all of the night being eaten alive by mozzies.
I will be running a leopard 4082 1030kv motor on 4s lipo with a leopard (hobbywing) 150a esc. it is geared 23/46 so i should get about 40MPH. ATM i have to run a 46t spur as i have removed the upper big plate of the lower section (if anyone understands that, well done) so untill i get my dremel working again i can't cut the groove easily.
(anyone know where to get the brushes for a dremel in brisbane [not bunnings])
Also gave bluey (LD's LST) a run and all was good. It was on 6s lipo and the motor was getting hot so i might go up a tooth on the pinion and go down to 4s lipo.
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Raced my red LST today. It was friggen awesome, i didn't have a clean run at all but once everything is sorted out it should be sweet. For the times i was racing it was great. The steering is pretty crap but i'm learning to slide it into the corners. It's odd, you have to go too fast into a corner to make it around. If you go too slow it's difficult to get around the corner.
After about 8 mins of running (longest continuous run) the motor was at 180oF and the esc was at 120oF so i need to gear up. The problem is that i am currently running the stock diff gears (low ratio about 3.2) with a 46t spur and 23t pinion and it's undergeared. Other than that i had no other issues with the setup but one of my batts disconnected itself from the deans in the final but the transponder wasn't working anyway.
So, failures for today, steering link popped off (diff-wheel), rear centre driveshaft grub screw cam loose and cvd joint failed, front driveshaft grub screw came loose, rear driveshaft grub screw came loose, steering link came off (servo-steering link) and the battery screwed itself.
So i think i'll rebuild this sometime before the next race using locktite everywhere it's needed and i'll try to fix the steering but i don't really like my chances.
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Also gave my blue LST a run when the red one was out of action, it was good but it was terrible to drive as the tires had no traction at all and i shredded the rear diff, though after the short period of running the motor was very hot, i'm a little ashamed to say this but one reading i got was about 200oF while the other was about 195oF
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I think i might get the blue lst back into working order and get everything good then i might sell it. I just don't really need a basher ATM. I might even sell it with the old syle of lower plate so that if someone ants to they can buy the stuff needed to make it into the V1 of the custom LSTe.
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Just a little update.
Swapped out the leopard motor with a CC 1717 as the leopard was getting hot with a 23t/46t but i do have a 25t pinion if i go back to the leopard.
I have also decided to make a mount for the esc and RX. This will simply be a strip of aluminium that will run from the front of the upper CD mounting holes to where the old RX box went. This will make the ESC in the direct flow of air plus it should be easier to work on. The RC box i am thinking of using is from the old Hyper 7's/ST's. this RX box is very big and will be perfect for this area.
Also i painted the two smaller lower plates and the motor mount black the other day. It was only lexan paint as i was bored but i may regret it as it won't allow the same amount of heat transfer.
Also i have gone to a HS-7955 servo as i have installed a MGT servo saver and the only one i could get was for hitec servos. However this has made a screw sit quite high so i think i will be buying the losi HD front lower skid plate as it should protect the servo a little more. Still, if i felt really inclined i could actually make a new servo hole that would do away with some more issues i have with the LST.
Also i am thinking of getting the lower plates, upper CD plate and possibly the chassis CNC'd by a place her in brisbane but i'm not sure of they have 6061-t6 alu and how much it'll be.
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lso, just thought i might mention this, i have decided (for now) to keep the blue LST as a spares truck. I might tear it down this weekend so that i can make all the parts more portable.
Also, i should be getting my new dremel tomorrow. I tried new brushes which didn't help, called dremel who pretty much said i'll have to buy a new one as it's out of warranty. This should allow me to make the parts a little better as before i was using a jigsaw, angle grinder, hacksaws and files.
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while getting some stuff from HK i decided to get a 2.5mm thick 300x100 sheet of CF. To my surprise it seems to be good quality CF. I'll probs make the two smaller lower plates out of this CF so they wont be load bearing but should reduce some weight.
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