Search found 17 matches

by Foob
Jan 07 2019 11:50am
Forum: Electric Aircraft
Topic: Rolls-Royce world’s fastest all-electric aircraft
Replies: 5
Views: 774

Re: Rolls-Royce world’s fastest all-electric aircraft

It's interesting that they talk about how they've recruited a big experienced team for this internally important project, but the powerplant is just three YASA motors bolted together. I guess those things are hard to beat.
by Foob
Nov 27 2018 12:27pm
Forum: Electric Aircraft
Topic: practical range
Replies: 7
Views: 867

Re: practical range

Heh, you didn't mention off-airport! Though, maybe for paved strips "not even close, at any price" could be "getting closer, at the price of a fancy Cirrus"? I think off-airport ops are likely to remain challenging for EVs even after regional jets, with all their infrastructure support, are spinning...
by Foob
Nov 26 2018 12:13pm
Forum: Electric Aircraft
Topic: practical range
Replies: 7
Views: 867

Re: practical range

Could any of the SunFlyers have done the trip? Not available yet, but SunFlyer 2 seems to be getting closer to a cert.
by Foob
May 14 2018 9:37am
Forum: Electric Aircraft
Topic: Open Source e-Powered Paraglider forum
Replies: 3
Views: 1332

Re: Open Source e-Powered Paraglider forum

Yeah, I guess the zero-torque nature of the multiprop electric PPGs would be great for flying a paraglider wing without having to set it up specifically as a paramotor wing.
by Foob
Mar 25 2018 2:44pm
Forum: Electric Aircraft
Topic: Pipistrel e plane surges production
Replies: 7
Views: 1294

Re: Pipistrel e plane surges production

Cell choice is discussed a bit in the podcast in the first post. Although they don't say the specific cells they're using, they do say the energy density is significantly worse than state-of-the-art in order to support multiple back-to-back charge/discharge cycles per day without too much degradatio...
by Foob
Mar 23 2018 12:53pm
Forum: Electric Aircraft
Topic: Pipistrel e plane surges production
Replies: 7
Views: 1294

Re: Pipistrel e plane surges production

Right, this seems like it would only make sense to the bigger flight schools as an ab-initio trainer, and maybe an hours builder? There's apparently a guy in Canada who bought his for commuting around Vancouver though, so I guess the duration's enough for some people... BTW, for those interested, ht...
by Foob
Mar 21 2018 11:36am
Forum: Electric Aircraft
Topic: Pipistrel e plane surges production
Replies: 7
Views: 1294

Re: Pipistrel e plane surges production

Wow! 5 to 6 a month is serious production. If they maintain that rate for 12 months, it would put them easily in the top 10 selling aircraft for the year. For a short-legged, two-seat trainer! (Unless I'm misreading this http://www.fi-aeroweb.com/General-Aviation.html)
by Foob
Dec 22 2016 5:22pm
Forum: E-Vehicles General Discussion
Topic: The Snow Joe ION18SB Snow Blower... modified..
Replies: 9
Views: 2004

Re: The Snow Joe ION18SB Snow Blower... modified..

1k? Ouch! It was 600 here. I'd be interested in the internals myself, but the 3 year warranty is discouraging me from cracking the case open. I had one of their lawnmowers die on me this summer, and they replaced it with a newer model, so it's worth not voiding I think. At 60 amps/2.4kw, I bet you'l...
by Foob
Dec 21 2016 9:55pm
Forum: E-Vehicles General Discussion
Topic: The Snow Joe ION18SB Snow Blower... modified..
Replies: 9
Views: 2004

Re: The Snow Joe ION18SB Snow Blower... modified..

Awesome. I just bought the 56v Ego snowblower with 2x5ah packs. On the 4 or 5 inches of wet snow we got at the weekend, it cleared my driveway, my front path and the sidewalk in front of the house. Not much energy left by the end, but it didn't quit. It couldn't get much of the snow that the ploughs...
by Foob
Nov 20 2016 4:29pm
Forum: E-Vehicles General Discussion
Topic: Roborace ..driverless AI race car series !
Replies: 6
Views: 710

Re: Roborace ..driverless AI race car series !

Do you think human racing will be obsoleted? Even a cheap PC (hell, maybe even a phone) can beat a chess GM these days, but nobody cares about computer chess matches. Could be that autonomous racing cars stay interesting right up until a human can no longer beat them, then everybody stops paying att...
by Foob
Oct 25 2016 10:36am
Forum: Electric Aircraft
Topic: EMALS, linear motor carrier jet launch system
Replies: 6
Views: 1379

Re: EMALS, linear motor carrier jet launch system

Of course, launching using flight engines has the advantage that you know your engines are running well enough to sustain flight before leaving the ground.
by Foob
Aug 19 2016 4:33pm
Forum: Electric Aircraft
Topic: E-Glider
Replies: 6
Views: 1698

Re: E-Glider

Looks like a really nice, compact setup. Where is the battery mounted in the in-flight picture you posted? Between the pilot and the motor?
by Foob
Jul 05 2016 10:23am
Forum: Motor Technology
Topic: Racing and efficiency
Replies: 98
Views: 12930

Re: Racing and efficiency

On the topic of fast starts and clutches, Brammo actually did this with their bikes, so have some empirical evidence on what worked better. http://brammoforum.com/index.php?topic=2054.0 has some discussion in the last three comments.
TLDR : "Slipping the clutch just slows you down."
by Foob
Apr 29 2016 3:20pm
Forum: Electric Aircraft
Topic: World Record Hoverboard Flight
Replies: 24
Views: 6577

Re: World Record Hoverboard Flight

Don't think any of these hoverboard style things would fall under FAR-103 since their power off stall speed is going to be, umm, rather higher than the limit.
by Foob
Apr 18 2016 11:49am
Forum: Electric Aircraft
Topic: Elephant in the room - Quadcopters...
Replies: 189
Views: 30839

Re: Elephant in the room - Quadcopters...

I also have no opinion on whether this is real, but to play devil's advocate and run some numbers for fun: I'd guess turboreactor is just a poor translation of turbojet, and large model scale turbojets are available off the shelf (eg http://www.jetcatusa.com/images/Engine%20Data%20Sheet%207-14-2015....
by Foob
Nov 19 2015 3:50pm
Forum: E-Scooter and Motorcycle General Discussion
Topic: Zero FX 5.7 DC/DC not working
Replies: 6
Views: 878

Re: Zero FX 5.7 DC/DC not working

Not sure how helpful this is, but there's a wiring diagram for a 2013 S in this thread http://electricmotorcycleforum.com/boar ... pic=3603.0