heathyoung wrote:The D8 is what full-throttle used for one of his builds IIRC.
Nice frame, and weldable. Bit of a bugger about the spokes though
yea im thinking ill just order a mx rim, ive found some around the 1.5kg mark, witch is heaver than i'd like, but they're solid as a rock and reasonably cheap. having a slightly smaller wheel + thicker rubber should help compinsate for the extra weight... will hopefully be a 23-24" wheel. I almost never go top speed anyhow. almost...
Not much news to report on this bike, apart from the spokes its been going great. I've been getting <15wh/km on a regular basis, sometimes lower than 10wh/km, with pealing. Its good fun on well surfaced trails/roads but offroad I have to take it so easy to aviod snaping spokes that its not as fun... so hopefully the mx rim and some 12g spokes will help.
Only thing ive changed is to upgrade the wireing for the balance leads. They were too long, and too thin, (some about 80cm long, and all about 32g or so) now its all 22g, and about 25cm at the most, using a 9pin vga plug for each 8s subpack.
Something that will be changing soon though is the side covers. Summers 'ere, its hot as hell, and I dont want to limit the power if I can help it... Thanks to 'oldhaq' im the proud owner of his burnt and fried HT motor. He really did a number on it, the windings are black as night and there is a number of shorts to the body of the motor. not to worry, I only wanted it for the 'spare' sidecovers and the chance to pull one open while still having one to ride.
Forced air is the plan, with a ring of little alluminium heat sinks that I got from DX (http://www.dealextreme.com/p/aluminum-cooler-heat-sink-chipset-for-ram-memory-w-type-8-piece-set-35816?r=79543430 right around the inside of the stator. I'm thinking ill use a disk of alluminium to help hold 'em against the stator + some thermal glue, and then mount the fans onto the disk. i found some pretty low profile blower fans on the bay that still throw out a fair bit of wind. should help keep things cool.
on another point ive started recieving parts for the d8 build - the thread can be found 'ere...
So far I have the motors, and the lyen controller. sill need to get the gearbox, a ~1:1.2 belt drive for the 1st stage and the other usual parts that are needed before I can start putting it together. fortunately my old 5s packs from when I was running 20s are sill in good nick, so that'll do for a 10s20ah pack to start with!
Im also going to try my hand at fabing a magnetic torque limiter. I built a crude one out of timber as a test peice, and with a handfull of weak magnets and a hastily made build I got about .8nm breaking torque... I've got ideas now for a bit larger and higher quality alloy peice, that should be about 9cm in diamiter and 3cm wide, that should break at about 8-9nm, asuming ive calculated it right. It'll be interesting even if it doesn't work...
Ill try and rememver to get some photos/vids up soon too. its weird with the chesty mount gopro... I think I can hear my heart beat!!!