I'd back hyena and say a 12 is plenty, particually given your using a HT. run 24s lipo an hold on, these motors pull like a mule with just the default settings (40a)! up a 20% grade at about 40km/h! 18 is overkill, participially for flat ground/small hills. depends on how much boggy acceleration you'll be doing though. 18fet will likely burn this motor in quick order unless you ride nice.
Hmm so if i go for a 12fet, i risk blowing it up if i get too throttle happy and carried away. If i go for the 18fet, i risk burning up the motor? Would the 18fet supply the current in a more agressive manor?
sn0wchyld wrote:good frame choice, are they removable dropouts i see ?
Why yes they are
Though i won't totally rely on them to resist the hub's torque, i plan on welding some gussets to the swingarm just in front of the dropout mounts and also bolting the torque arms to these to help disperse the force.
sn0wchyld wrote:and yea, go for atleast 13g spokes, possibly 12. ive been snapping swiss SS 14g spokes like there twigs, its the low down torque combined with any type of shock on the wheel that kills 'em most, but normal riding will still break them eventually. im ordering some 12's off JHH and drilling out the eyelets asap.
I wonder if ya can get 12/13g hybrid spokes, 12g at the flange and 13g at the threaded end? I'd rather not have to drill out the eyelets if possible.
sn0wchyld wrote:how much is the bike before any additions? doing it with 1200wh's of batteries is going to be a challenge (my norko with 1kwh is about 40kg...)
Reading this made me go out and weigh the bike. With everything on the pre-e converted bike apart from the back wheel and brake lever/callipers, it sits at 18kg. Factor in 10kg for the complete rear wheel, 9kg of lipo and around 3kg for the brakes, controller and aluminium box and i'm up to 40kg like your Norco
Oh well never mind, it'll still come in about 15kg lighter than a Bomber so i'm ok with that. I only weigh 67kg so the all up rider and bike weight will still be reasonably light compared to others.
sn0wchyld wrote:Are you modding the frame on this one too? looking forward to what this becomes, I loved your last build. It is one of the inspirations for my new build, a old avanti d8 that'll be modded to house the bats much like yours.
Yep its getting the chop too, the black lines on the frame pic in the 1st post show where its getting cut and where the battery cover will be on the LHS. The D8's were chrome moly weren't they? Should be a solid platform to build with
Justtoby wrote:I plan to use a hub motor and I am toying with getting a spare rear for my bomber with the high speed wind, I can stick it on my bomber and put the high torque in the patriot but swap back and forwards. The patriot is a nice frame but not sure which mine is. Brendan Fairclough (world down hill champ) lives near me. And has a few patriots in his workshop. It they are heavily outnumbered by 2013 carbon specialised downhill bikes as they. Ow sponsor him.
Nice one, that'll give you good flexibility being able to swap them back and forth. Are you going to get one of Brendan Fairclough's old patriots?!!
Man he and Sam Hill are bloody fast riders!
Kepler wrote:Hyena knows his stuff that's for sure. A 12 fet will probably be up to the task. Worth mentioning though that Stealth Fighters using basically the same motor now all run 18fet controllers. I am tipping there is a very good reason for this
Bugger it, i feel like flipping some coins "two up" style and basing my decision on that! Damned if i do and damned if i don't!
Holy crap he is a freak of nature! I was lucky enough to meet Chris Kovarik back when i was friends with the then owner of Ashgrove Cycles who sponsored Chris as he was just getting into pro downhilling. Back then (circa 1997ish?) Chris was still working as a labourer if i remember correctly, nice guy too.
sn0wchyld wrote:dont stealth's have temp monitoring that cuts power when things get too hot? if I had a temp probe, 18 would be fine... mind you, it'd also be much harder to mount.
One of the other boys will have to comment on the temp probe thing. Mounting an 18fet doesn't worry me, thats easy enough
Well i'm off to Bali at 4am tomorrow so will bid you all farewell for this year, thanks for taking the time to add your input to my humble thread, stay safe and have a wonderful Xmas and New Years everyone
I'll try to get to a net cafe or something similar when i'm either not inebriated or perving on scantlly clad young ladies on the beach