but big motors need BIG speedos and BIG batteries!
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but big motors need BIG speedos and BIG batteries!
storm2 has a specialist esc but their batteries are only 36v a123 x 4 packs giving 9.2 amps, same as what i use except im on 32.4v ( 1 cell less) hmmmmmm maybe i could upgrade aswell !
terry, how much are your a123s discharged on an average fight? i was hoping i could get away with 2, 10 cell packs
Its not just a matter of how much capacity you have left, more packs means current available.
meant 3 packs^
the cells i'm using have a continuous discharge of 30c so i'm hoping they'll be able to discharge enough current for 2 bosch 750's and a solenoid valve
I thing an invertible 4wd flipper could be a very good bot :)
It could be if it's built properly, but you would need to spend a lot of money on it.
i dont see why? with careful designing and with larger wheel size it should be easily done
What exactly have you built before? Can unfortunately imagine I sounded this yappy when I started, aged 11 -shudder-
This is all very much just a nice idea, with my build skill I highly doubt I could put it in practice but it's really a unusual concept thy if someone wants to build they are mor then welcome
Well to start with, pneumatics are expensive so anything involving them will be fraught with expense and complexity. Also, if you're going for 4wd you'll need twice the number of motors, possibly twice the number of ESCs, possibly bigger batteries? That would be expensive too. Not sure how it will work weight wise either, adding all that extra stuff you may need to reduce the overall size of it, or armour thickness.
A low pressure pneumatic system hw sized can be built for less than £250 although can be quite complex but woody has an excellent page on his website that explains the dual quick exhaust valve method ( which I would recommend as this is a cheap way to get enough flow to flip people). 4 motors is not necessary as one motor can give drive to 2 wheels with use of chains, belts or gears
By the title of the thread I assumed it was going to be a ram bot with a pneumatic flipper element to it, so assumed that the 4wd you would be wanting would be ome that would be more powerful that a 2 motor system driving 4 wheels.
Also, I would call £250 expensive, maybe thats the Scots blood talking :lol:
it's alot less expensive than a fp heavyweight pneumatic system, my fp ram alone cost me more than £250 :crazy:
the thing with LP is you can get someone OOTA, it just takes more effot were as FP can do it fairly easily
LP is a good way to get experience with pneumatics and running it at LP is fine but a full FP is something I would probably set cash aside for every now and then till i can afford the upgrade.
Also, my faint plan was to run 2 motors on 4 wheels with a chain drive system linking them, so there is no need for larger esc's or batteries 8)
i agreee, i started out with lp. great learning experience.
im guessing your going for something similar to Merlin? If so you wont get it in weight, the plan was for Merlin to move to 4wd, but that can only be done by spending money on either lems/Ti/Lithiums to get the weight and space. Also to get the power form a LP system you need a big ram (100x200) you wouldnt get a ram that size in something like Merlin. Unless your going for something bigger than Bosch 750s, theres no point going 4WD.
would you mind if i altered the original toxic into something based on merlin? LP system clearly though
One good example is USA bot Rammstein, sure it maybe a SHW but when they removed some of the batteries they were
light enough to enter HW competition, example War of Indepence series 4
i think something merlin style would be good since you dont see many flippers like that :)
were is the best place to buy bosch 750s or 400's?
i know they are both commonly used yet im not too sure were you all buy them
ellis components sell bosch 750's, planning to buy a pair from them in future
ah yes, i remember them! they were £160 for a pair but it was something stupid like £40-£60 to get them sentQuote:
Originally Posted by jonny
you sure that the 40 to 60 wasn't just VAT and delivery? If it was, sounds pretty reasonable to me
i was thinking the same, i thought you were getting a pair of bosch 750's with toxic?
Gary, it might well have been and if so that's not too bad
Jonny, I'm unsure in that front but I'm waiting for the final details from terry
are the bosch 400w motors smaller than the 750's in terms of size and power?
last i heard they were bout £114 plus VAT and P&P, but that was a couple of years ago.
Is the price for Bosch 750's or 400's?
that price i would say is for the 750
well yes there is a difference in power of the 2 motors one is 750watt the other 400watt smaller in size too (the 400)
Since toxic has mounts for 750's it's probably better for me to go for them
bosch 400 weighs about 3.1kg and bosch 750 weighs about 3.7kg aswell
i think for the sake of 1.2kg its probably worth it but what is the price difference?
Hi, I got a quote at the very start of Feb this year
Bosch 750 - £86 each
Bosch 400 - £90 each
All prices are ex works and subject to VAT
If those prices still stand then it makes sence to use the 750's
Just a shame there aren't any Bosch 400s on eBay for £5 each like there were four years ago :crazy:
But from what I've heard, the 400s don't like being over-volted to anything above 18V (Chaos 2 seems to be the exception) so if you're wanting to over-volt to get more power, the 750s are definitely the better option. That and the fact they're generally more powerful.
Were would I be able to find some second hand motors?
I'm from the black country area so we like a good deal much like to scots )
put up a wanted thread on the forum
I probably will once I physically have toxic.
Just out of curiosity, what are both those motors actually built for? By that I mean what job are they intended for?
Yeah but most of Chaos 2's bout lasted seconds thanks to them always OOTA-ing so the motors always lasted!
I do believe on their site they stated a Bosch 400 at 24v wasn't much different from the 750.