Power in Flux

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Stevo clicked Likes for this post: BMW E-Power Roadster concept by Warren

1 Day Ago

Warren replied to the thread BMW E-Power Roadster concept.
" Just like the legacy auto makers, BMW, Honda, Kawasaki, etc. are not going seriously into electric motorcycles until batteries improve more, or government regulation forces them. For a new company, hoping to get a jump on legacy makers before then, it makes sense. "

1 Day Ago

Richard230 clicked Likes for this post: Transmissions. The Final Chapter. (Summer, 2018) by Warren

1 Day Ago

furyphoto replied to the thread Vancouver's Harbour Air going Electic.
" Some video clips, and news story here: https://globalnews.ca/video/6278729/...ht-in-richmond

DeHavilland Beaver. 750 HP, 160km (100 Mile) range.
https://assets.bwbx.io/images/users/...v2/1000x-1.jpg "

1 Day Ago

Warren replied to the thread Transmissions. The Final Chapter. (Summer, 2018).
" https://insideevs.com/news/387298/20...rbo-epa-range/

The efficiency is so bad, it is really pretty amazing. "

1 Day Ago

Spoonman clicked Likes for this post: Vancouver's Harbour Air going Electic by furyphoto

1 Day Ago

Richard230 created the thread BMW E-Power Roadster concept.
" BMW continues to come up with an electric motorcycle design that their customers will love. This is a nice try, but does seem to be a work in progress. Not quite up to Energica's production electric motorcycle standards, though. Gotta keep on trying: https://riders.drivemag.com/news/mee...0-nm-of-torque "

2 Days Ago

frodus replied to the thread Vancouver's Harbour Air going Electic.
" This is pretty awesome! "

2 Days Ago

furyphoto replied to the thread Vancouver's Harbour Air going Electic.
" Test flights are today, hopefully there will be video published in a few days.
https://vancouverisland.ctvnews.ca/m...3D8Sn5kacbWVHQ "

2 Days Ago

Richard230 created the thread Fastener types.
" Here are various types of fasteners recommended by the Hayes service manuals that you might need for your next project. "

2 Days Ago

Stevo clicked Likes for this post: Damon Motorcycles Hyperpro Sport by Richard230

6 Days Ago

Richard230 created the thread Damon Motorcycles Hyperpro Sport.
" While I can't get too excited by the name of this EV, nor the riding position, I do like the design. But it seems to be more of a technology demonstrator than an attempt to produce an actual production motorcycle and I am not too sure if I want my motorcycle to communicate with everything in the vicinity, such as garage doors, washing machines and refrigerator ice makers.

One other thing that caught my eye was this comment at the end of the article: To ensure high performance dominance, the company recently added electric powertrain veteran Derek Dorresteyn to its team to head up operations and powertrain development as its new COO. Derek had the technical vision and led the engineering and manufacturing teams at Alta Motors from 2008 – 2018. His vision was key to Alta’s podium finishes against ICE motorcycles. There were some smart people at Alta Motors and it is interesting to see where they are ending up.

https://electricmotorcycles.news/dam...o-at-ces-2020/ "

6 Days Ago

Spoonman replied to the thread I live in Laos.
" I've heard about those cheap ones alright - I expect they will upgrade quite well provided you can either reprogram or replace the charger, and ideally fit a BMS as well. "

1 Week Ago

Mavec created the thread I live in Laos.
" I just bought my first electric motorcycle, 2000 watt Chinese brand. Getting excited about upgrading cuz it uses lead acid batteries and I want a longer range. "

1 Week Ago

Spoonman replied to the thread BMW files a patent for an electric sportbike.
"
Quote Originally Posted by flo View Post
@ Spoonman
to my knowledge the frame is not simply bend tube... since the advent of the so called Delta box frames these parts are welded half profiles (inside and out) ad left and right.., i guess the raw parts pressed? / cast aluminum.
no tubing anymore today.
so there should be no more work or tooling involved basically.
Bent steel tube in the case of trellis, and welded pressed forms in the case of aluminium for the most part AFAIK.
Machine finishing a cast would certainly be more work than welding up a frame. You can cast the main housings readily enough, but then there's all the tooling operations required to clean mating faces, cut gasket beds, drill and tap bolt holes... the list goes on.

Again, as I'm thinking about it now though - if those steps aren't being performed in the manufacturing of a traditional engine, then the capacity to is still there as it would likely still be less work than machine finishing engine block castings. "

1 Week Ago

Stevo replied to the thread Elon Rolling out the New Tesla Electric Motorcycle.
" Looks like it has a huuuuge battery pack "

1 Week Ago

flo replied to the thread BMW files a patent for an electric sportbike.
"
Quote Originally Posted by Richard230 View Post
There is a video of the C-Evolution being manufactured in BMW's plant floating around. .
Oh
ok- you were reffering to the scooter.
Agree with you on that.

@ Spoonman
to my knowledge the frame is not simply bend tube... since the advent of the so called Delta box frames these parts are welded half profiles (inside and out) ad left and right.., i guess the raw parts pressed? / cast aluminum.
no tubing anymore today.
so there should be no more work or tooling involved basically.

flo "

1 Week Ago

Spoonman clicked Likes for this post: BMW files a patent for an electric sportbike by Richard230

1 Week Ago

Spoonman replied to the thread BMW files a patent for an electric sportbike.
"
Quote Originally Posted by Richard230 View Post
As mentioned in the article, they are already using the battery box as the chassis in their C-Evolution electric scooter. So not all that daring for BMW. But I bet the cost of manufacturing that vehicle is not cheap.
Very different load profiles between scooter and streetbike performance.

I'd be concerned that the proposed 'chassis' design would be overly stiff - granted we're unlikely to be pushing them to superbike levels but a certain bit of flex is still desirable (The original SP2 proved that point quite well).

Quote Originally Posted by flo View Post
Hi
may i ask what makes you think so?
Substantially less work involved in bending and welding extrusion or tube, than there is in finishing cast components.
That being said, and now that I'm thinking about it, Nissan's EV drivetrain is entirely built into cast enclosures so if they were going to go that route anyway then, yeah maybe there's a reasonable 'why not?' in there alright. "

1 Week Ago

Richard230 replied to the thread BMW files a patent for an electric sportbike.
"
Quote Originally Posted by flo View Post
Hi
may i ask what makes you think so?
A 4 piece battery box vs. a 4 piece frame ( 2 inside welded to 2 outside frame parts). Everything else is same on any bike, attache headstock, forks,engine,swing incl. backwheel and dampers, seat and fairing...
Ok integration of battery, charger and controller etc might be a little more fiddly but batteries usually need boxing up anyway.
Just wondering where you see the difference.

Ok- it would be expensive for sure, simply because it would be made by bmw but other than that?

greets

flo
There is a video of the C-Evolution being manufactured in BMW's plant floating around. The aluminum casting that encloses the battery pack seems very complex to me and the construction of its power train looks heavily automated. It just looks a lot more costly to build for a low-volume vehicle than bolting stuff onto a steel tube frame, as BMW does with some of their other motorcycles like the new F850/750 models.

In the video I was very impressed watching the robots do their thing when building up the scooter's aluminum box chassis. Then it occurred to me: I wonder how you could get to those batteries inside their welded-up box if you ever wanted to replace on of the modules? But I agree that it seems to be a good structural design as long as you don't have to ever get into that battery cage. "

1 Week Ago