Search found 594 matches

by tahustvedt
Jul 26 2016 6:31am
Forum: E-Bike Non-hub Motor Drives
Topic: Project: Home made velomobile design with crank or mid motor
Replies: 338
Views: 62661

Re: Project: Home made velomobile design with crank or mid m

The CFD run shows that this is a superb shape. A little over one fifth the drag of my first velomobile build. I will run the more blocky design tonight and will have the result tomorrow.
by tahustvedt
Jul 25 2016 12:40pm
Forum: E-Bike Non-hub Motor Drives
Topic: Project: Home made velomobile design with crank or mid motor
Replies: 338
Views: 62661

Re: Project: Home made velomobile design with crank or mid m

I'm 3D-printing this now. Will take a photo of the model next to the model of the old one. :)

Image

Image
by tahustvedt
Jul 25 2016 9:33am
Forum: E-Bike Non-hub Motor Drives
Topic: Project: Home made velomobile design with crank or mid motor
Replies: 338
Views: 62661

Re: Project: Home made velomobile design with crank or mid m

The other day I rode a 20 km lap with lots of climbing in 45 minutes and about 11 Wh/km. Roughly 26,7 km/h average, I think.

I have a lot of changes in mind. :)
by tahustvedt
Jul 24 2016 8:52am
Forum: E-Bike Non-hub Motor Drives
Topic: Programming the Bafang Middrive BBS01+BBS02
Replies: 1138
Views: 304584

Re: Programming the Bafang Middrive BBS01+BBS02

What setting do I change to make the motor stop spinning once I pedal faster than the max pedal assist speed?

Both my BBS01 250 W and BBS02 spin to eliminate the gear drag once I pedal faster than the assist speed of 25 km/h, and consume about 2 A at this unloaded mode. This is almost 80 W of waste.
by tahustvedt
Jul 24 2016 5:53am
Forum: E-Bike Build Threads / Photos & Video
Topic: My Velo Pedal Car Prototype
Replies: 64
Views: 5249

Re: My Velo Pedal Car Prototype

Do you have a drawing or plan for how the body will look?
by tahustvedt
Jul 22 2016 9:32am
Forum: E-Bike Non-hub Motor Drives
Topic: Project: Home made velomobile design with crank or mid motor
Replies: 338
Views: 62661

Re: Project: Home made velomobile design with crank or mid m

I'm tempted to buy two 15Ah Li-ion packs from BMSbattery. That will give me 42 Ah total, 120 km range in the hilly terrain up here, and basically eliminate my need for a car. I spend about 12 Wh per km.
by tahustvedt
Jul 22 2016 9:06am
Forum: E-Bike Technical
Topic: fatbikes any slower than 26"er drag wise?
Replies: 10
Views: 585

Re: fatbikes any slower than 26"er drag wise?

I have some road tires for my fat bike. With 20 psi they roll incredibly well. It's ridiculous. The bike still isn't fast though. Aero drag is very high.
by tahustvedt
Jul 22 2016 9:03am
Forum: E-Bike Non-hub Motor Drives
Topic: Project: Home made velomobile design with crank or mid motor
Replies: 338
Views: 62661

Re: Project: Home made velomobile design with crank or mid m

I'll post a picture of the led arrangement later. The acrylic cover is coming loose at the edges so I will have to glue it back on soon. I used six orange leds on each side to act as direction signals, and a long red LED strip across which is pulsating at ~2 Hz. I don't have any brake lights, but ma...
by tahustvedt
Jul 21 2016 1:46pm
Forum: E-Bike Non-hub Motor Drives
Topic: Project: Home made velomobile design with crank or mid motor
Replies: 338
Views: 62661

Re: Project: Home made velomobile design with crank or mid m

I installed a voltage/current/power/energy meter on the steering column last night. Works well, but I haven't calibrated the high current indication. Zero current calibration was easy, but I will have to get some big resistors in order to test the high current indication. The housing is 3D printed a...
by tahustvedt
Jul 16 2016 7:48am
Forum: E-Bike Non-hub Motor Drives
Topic: Project: Home made velomobile design with crank or mid motor
Replies: 338
Views: 62661

Re: Project: Home made velomobile design with crank or mid m

Yeah the midnight sun is awesome. Too bad it's overcast. I hope for better weather soon, it's been pretty grey so far this summer.
by tahustvedt
Jul 15 2016 1:42pm
Forum: E-Bike General Discussion
Topic: KrankUps, a new bicycle technology!
Replies: 11
Views: 1040

Re: KrankUps, a new bicycle technology!

The bit where the guy rode with and without crankups in split screen was hilarious.
by tahustvedt
Jul 15 2016 11:19am
Forum: E-Bike Non-hub Motor Drives
Topic: Project: Home made velomobile design with crank or mid motor
Replies: 338
Views: 62661

Re: Project: Home made velomobile design with crank or mid m

Here's the potentiometer mount. A ball bearing supports the shaft end to reduce the radial load on the potentiometer.
by tahustvedt
Jul 15 2016 10:24am
Forum: E-Bike Non-hub Motor Drives
Topic: Project: Home made velomobile design with crank or mid motor
Replies: 338
Views: 62661

Re: Project: Home made velomobile design with crank or mid m

Yes. Each suspension has about 80 mm travel, so it's not going to lean it hard over like a bicycle, but hopefully I can make it work well enough for normal riding. It's an experiment.
by tahustvedt
Jul 14 2016 5:14pm
Forum: E-Bike Non-hub Motor Drives
Topic: Project: Home made velomobile design with crank or mid motor
Replies: 338
Views: 62661

Re: Project: Home made velomobile design with crank or mid m

Can you go into detail the hardware you are going to use to actuate the suspension? I get that you have air shocks and can tap into the pressure port, but what hardware are you going to use to pressurize and/or alternately depressurize the opposite piston? With a double A-arm suspension, are you ju...
by tahustvedt
Jul 14 2016 3:51pm
Forum: E-Bike Non-hub Motor Drives
Topic: Project: Home made velomobile design with crank or mid motor
Replies: 338
Views: 62661

Re: Project: Home made velomobile design with crank or mid m

Time will tell how well the solar panel works. So far I'm experiencing unusually dark weather. I have started preparing for the pneumatic leaning system. I made a two piece pulley to mount on the end of the steering axle, which will let me index the steering with a belt down to a potentiometer. I us...
by tahustvedt
Jul 14 2016 6:01am
Forum: E-Bike Non-hub Motor Drives
Topic: Project: Home made velomobile design with crank or mid motor
Replies: 338
Views: 62661

Re: Project: Home made velomobile design with crank or mid m

That would be cool. The weather currently isn't doing much good.

Image
by tahustvedt
Jul 13 2016 1:28pm
Forum: E-Bike Non-hub Motor Drives
Topic: Project: Home made velomobile design with crank or mid motor
Replies: 338
Views: 62661

Re: Project: Home made velomobile design with crank or mid m

dlspb wrote:Very great !!! :D
How much weight?
The panels weighs about 1 kg more than the window it replaced. :)
by tahustvedt
Jul 13 2016 11:11am
Forum: E-Bike Non-hub Motor Drives
Topic: Project: Home made velomobile design with crank or mid motor
Replies: 338
Views: 62661

Re: Project: Home made velomobile design with crank or mid m

Sorry, the panel specs say 2 kg, so it's 1 kg xtra. I received the boost regulator today and it seems to work, at least when I connected a battery to adjust the output to 41 V 2,5 A. It's completely overcast now so the panel is currently delivering 2 W to the battery. I'm looking forward to good wea...