Starting my second RC build.

[NickW]

You can, of course use leds and get however much light you need, but it's going to be pricey.

even a pair cree MC-E, or SSC P7 is probably only going to get you slightly better than a single 55W car beam best case.

Realistically, to get similar brightness to a pair of 55w bulbs, you're going to need around 4 of them driven close to their rated current (most commercial stuff isn't), and with adequate cooling to make them last.
The cycle luminators are a pretty darn nice light, and are already set up for ebike voltages, but you are talking ~$300 for probably a bit less light.

Personally, I wouldn't want to give up >100W to lights and would go with an LED based setup, but given the price difference I could certainly understand why someone would go halogen if they have the range to spare.

[E-racer]

I use these 48V H3 bulbs in my headlights http://www.lightexports.com/servlet/the-2053/H3-Fog-Auxiliary-Halogen/Detail

No dc-dc converter required. I will have one 5w LED headlight for daytime running. So during the day my headlight is only 5w. At night the low beam is one 55w and the high beam is both for 110w. I like to be able to see at night and dont care abt giving it 55w. And I like the construction of car fog lights, mine are aluminum cased. http://www.amazon.com/Navigator-NV-534-Crystal-Rod-Light/dp/B001BB3IRO Killer deal at only $35 and its very easy to add a LED to them. I make my own mounts for them.

[E-racer]

1st stage reduction.

[x88x]

Hmm, interesting. I haven't seen one done that way before. Are you going to fit a true shared axle or just join the two?

[E-racer]

true shared. I will be removing the turnigy shafts. My own custom one will go in. I am also removing the skirt bearings, and I will only have one shaft bearing per stator (all the way outboard). the gearbox has its own two center bearings. making 4 total bearings on the shaft.

[x88x]

Nice! I look forward to seeing that.

[E-racer]

Fancy Rendering for your enjoyment.

[E-racer]

More.

[AussieJester]

Have you seen Rodgahs Kona Stinky with dual 3220 Astors? Here's the last video before he stripped the bike down, might want to take a look how well that goes with so much power on a short wheel based bike before wasting money on twin motor setup Either way, Placing the motors on the swinf arm IMHO is a bad move, Rodger mentioned to me the flex he felt from the rear swing arm when lacerating with his setup, add to that the bad placement of weight over the rear of the bike to impact on handling, the less weight there the better, you wont keep the front wheel on the ground with this much power, it will be ridiculously overpowered, and not in a good way....all the best anywayz.

KiM

[E-racer]

To each their own. I know my DH bike needs more power than my scoot (1 80-100 similar gearing @48V). I'm worried the twins at 12S will be underwhelming and have plans to go to 24s at some point. If you can't keep the front wheel on the ground you aren't leaning far enough forward. I am gearing this for 60mph (my scoots geared for 52mph) I definitely don't think it will be to overpowered with that gearing. I am going to be running clip- on bars instead of mtb bars. This will lower my body a good bit. I'm really not concerned with adding 10lb of motor/gearbox above the wheel in fact my batteries are being mounted pretty high as well. All together motors, batt, and controller weigh under 45lbs. My Stinky is an XL someone 250lb's could ride it and I only weigh 165. The swing arm is definitely sturdy enough to hold those motors up there and with the 4link setup it will be even sturdier.

[AussieJester]

..just relaying what has been done and learned already, by all means fit two motors power to ya...literally.

KiM

[NickW]

I'm really not concerned with adding 10lb of motor/gearbox above the wheel in fact my batteries are being mounted pretty high as well.

I wouldn't be so much worried about it being high up, more that it's unsprung weight. It'll make the suspension less effective.
That said, It might not be a big enough deal to bother you.

Regarding "overpowered", as long as nothing's breaking and you can ride it properly, you're not overpowered.

It looks like it will be a fun toy.

[E-racer]

I'm really not concerned with adding 10lb of motor/gearbox above the wheel in fact my batteries are being mounted pretty high as well.

I wouldn't be so much worried about it being high up, more that it's unsprung weight. It'll make the suspension less effective.
That said, It might not be a big enough deal to bother you.

Regarding "overpowered", as long as nothing's breaking and you can ride it properly, you're not overpowered.

It looks like it will be a fun toy.

I agree. I was on a Formula SAE team I know all about the downsides of unsprung weight. I think much more than 10lbs and I wouldn't have done it. Luckily these motors are made for RC planes... being light and powerful is their point. The 80-100 with a kelly controller is rock solid reliable and with the cycle analyst acting as a throttle interface I'm pretty sure i can tune the throttle pretty nicely. Ive ridden the 80-100 w/ a sensorless RC controller, throttle response and control is not their strong suit. I think it should be a lot of fun as well thanks!

[Whiplash]

WOW! Very interested to see the end result! should be a rocket to say the least! I would try to keep as much of the weight forward as you can to hopefully be able to USE the power it will have, with any extra in the rear, it will have a tendency to wheelie more than you might be thinking! Bikes wheelie way easier than scooters, the weight is placed very differently. That being said it looks KILLER!

[E-racer]

WOW! Very interested to see the end result! should be a rocket to say the least! I would try to keep as much of the weight forward as you can to hopefully be able to USE the power it will have, with any extra in the rear, it will have a tendency to wheelie more than you might be thinking! Bikes wheelie way easier than scooters, the weight is placed very differently. That being said it looks KILLER!

Thanks! I've got to say having enough power to pull a wheelie whenever I want isn't necessarily a bad thing to me. This is a urban campus assault vehicle. I plan to be dropping stairs, ripping passed people in the grass, hopping up curbs, ect... That extra power will be welcome when climbing all the ridiculous elevation changes on my campus. I was clicking through your pics, You make some nice sub boxes, really impressive!

[E-racer]

[Whiplash]

I love the design and the quality of the rendering! The only thing I MIGHT change is the center of gravity. If you plan on having the batteries in the box, the weight might be a little weird up that high, my brothers bike has only 10AH of 44.4V on a seat post rack and you can definitely feel it back there up that high. My commuter bike has the same AH in the center of the frame and you can't even tell they are there! If I where you, I would move the whole "body" down a few inches at least...

Other than that BEAUTIFUL!

[E-racer]

I love the design and the quality of the rendering! The only thing I MIGHT change is the center of gravity. If you plan on having the batteries in the box, the weight might be a little weird up that high, my brothers bike has only 10AH of 44.4V on a seat post rack and you can definitely feel it back there up that high. My commuter bike has the same AH in the center of the frame and you can't even tell they are there! If I where you, I would move the whole "body" down a few inches at least...

Other than that BEAUTIFUL!

I'm assuming you are talking about lipo correct? I will take your advice for sure! thanks! I think I will move at least half the pack to under the tube and just extend (or maybe move) the body down like you were saying. Check back after the weekend I'll prob have it modified. Thanks for the encouragement!

[Whiplash]

Cool! Ill check it for sure!

[E-racer]

Split pack. Anybody know how to use the wire/harness tool in Inventor?

[E-racer]

[Whiplash]

Looks great! I like the white!

[MakeTheNoise]

Are you planning on running a rear disk brake? The calliper mount seems taken up with other duties.
Am interested in seeing this build move off the design screen and into the real world.
Also props to defiantly forging ahead with a design others are saying won't work.
Subscribed..

[Whiplash]

Yeah, its actually really looking really good! I would extend the rear "fender" just for aesthetics but other than that it looks real good! Almost like the old cafe racer bikes!

BUILD IT! BUILD IT!

[E-racer]

Are you planning on running a rear disk brake? The calliper mount seems taken up with other duties.
Am interested in seeing this build move off the design screen and into the real world.
Also props to defiantly forging ahead with a design others are saying won't work.
Subscribed..

I haven't fully detailed that rear brake mount yet because I haven't decided if I want to drop the rear brake or not. I know from my ESR the regen is sufficient under normal road circumstances. But from riding mountain bikes most of my life I also know its great to be able to lock that rear brake up and slide every once in a while. I just don't know yet. Right now that piece solely completes the 4-link for the chain drive in the model. I'm excited to move forward with the project. I have all the time I need with a water jet to cut almost all the pieces. I plan on manually machining the 1st stage reduction case. I'm a poor college student though so I'm selling off the contents of my garage to fund the project (scooters, gokarts, bikes, car parts, 2- stroke pipes ect... ). If any one wants a 250kw cont. electric bus motor and controller let me know... I've got one I cant afford a battery pack for .

Yeah, its actually really looking really good! I would extend the rear "fender" just for aesthetics but other than that it looks real good! Almost like the old cafe racer bikes!

BUILD IT! BUILD IT!

Modern Techno spin on a Cafe racer is exactly what I'm going for! Really due to the narrow 2.5" tires. I love these DH MTB parts though they are a cafe racers dream. I left the R. fender short because I figured if I case it down some stairs it may stay more intact if its smaller... A couple people have told me to make it bigger as well though so I may take that advice. I broke my collar bone in Jan so I need to take it easy right now n e way.