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  1. P

    Total fuel economy of towing a Model 3 with a Ford Raptor

    Firstly: can you charge a tesla by towing it? Secondly: Is it more fuel efficient to just drive an ICE raptor alone, or use the Raptor to charge the Tesla and then drive the Tesla? The answer may surprise! RaGVoB4Zn-Y
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    The trend of cities banning cars

    The main aim seem to be to reduce air pollution from ICE vehicles (vehicle bans are the new smoking bans), but another aim is to give more space to pedestrians and cyclists to make human-powered transport along with public-transport the default choice...
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    Ebike Stolen from Northampton, UK

    Hi guys, long shot but just in case anyone spots it or maybe parts for sale online. Frame is homemade Forks are Marzocchi Bomber 55 Rear shock is Fox Van RC Rear wheel is a regular 9C with upgraded phase wires laced in a Mavic EX729 with Avid BB7 brake Front wheel is a Big Earl with Avid...
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    koenigsegg hybrid with 3 Yasa motors

    The Regera: http://www.topgear.com/car-news/big-reads/world-exclusive-drive-koenigsegg-regera
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    Twist throttle + brake + shifter arrangement

    I've got a half-twist throttle with 3spd switch, a hydraulic brake lever and thumb shifter that is too awkward to use with the throttle at the same time. I'd like to switch to a trigger shifter but everything seems to want to occupy the same physical space. Has anyone got any recommendations or...
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    Model X Vs Alfa 4C Dragrace

    With a twist... UVXa6i3iqHw
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    Anyone used Ebay 36V/180W waterproof LED PSU?

    I'm looking for an easy option to provide ~75V for 18S LiCo charging via a BMS and wondered if anyone had tried these generic power supplies: http://www.ebay.co.uk/itm/301831668325?_trksid=p2060353.m1438.l2649&ssPageName=STRK%3AMEBIDX%3AIT 36V/180W "waterproof" and fanless. I'd be looking at...
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    Current Sharing in Pack Design

    Can I have a sanity check please on a proposed 4P9S 18650 pack layout? Grey strips are parallel nickel strip, orange lines are interconnecting wire on the top of the pack, purple lines are the same thing but on the bottom of the pack. I'm looking for the simplest/neatest solution that ensures...
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    Suppliers of 18S BMS?

    Are there any suppliers of LiCo ~50A 18S (or 20S) BMS other than BesTech? Someone more retail-oriented? There's nothing on ebay and I've trawled the net and the search function here. All I find are weak-sauce <14S and/or lifepo4 units. The problem with BesTech is the MOQ = 2, no pricing and...
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    Nissan Leaf Tuning Potential?

    Seeing as the Leaf looks to be the first EV that is becoming readily available and cheap as they age, it got me wondering about the tuning potential of these cars. I'm guessing some parts will have to be replaced, but does anyone happen to have any knowledge of the upper capability of the drive...
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    "20kW" ebike on eBay

    Anyone care to offer a critique this product? http://www.ebay.co.uk/itm/100-km-ph-Electric-bike-20kw-maxspoke-super-fast-hub-motor-72v-10ah-or-60v-24ah-/331572698076?pt=LH_DefaultDomain_3&hash=item4d3345dbdc The seller also mentions something which sounds like an 8kW crank drive. For...
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    Headtube Options (frame building)

    I need to order a steel head tube for a frame build and am getting into a muddle over the available options so could use some advice... The forks I currently have are a straight 1 1/8" steerer, but I want compatibility with different ones in the future. I understand that adapter headsets are...
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    Brake/shifter cable fixtures on frame?

    Does anyone know the name of the parts that secure the ends of the cable sheath to the frame? I need to buy some steel ones that can be welded on... Thanks
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    Are "Infineon" controllers water resistant?

    Chaps, I see a lot of controllers mounted externally on the downtube, where I imagine they see a lot of spray from the front wheel in wet conditions. Are the controllers from em3ev sufficiently water resistant as standard for this mounting position? Thanks, Ant
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    Crank height relative to axles? [Frame Design]

    I'm rebuilding my bike frame as a steel box to contain the ebike parts rather than having them strapped to the outside of the original frame. To complicate matters I'm also increasing both fork and rear shock travel. This was originally a paltry 1" rear 2" front. I upgraded this to 2"/2" (the...
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    Controller Operation: Trapezoidal, Sinusoidal, FOC

    If you're a noob like me and somewhat confused by the difference between the traditional trapezoidal-drive brushless motor controllers, the newer sinusoidal (sine wave) controllers we're starting to see on the market and the mystical FOC (Field Oriented Control) controllers we're seeing...
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    Effect of Clothing on Cyclist Safety

    A bit of research conducting on how a cyclist's choice of clothing affects the distance at which cars overtake during daytime riding: http://www.bath.ac.uk/news/2013/11/26/overtaking-cyclists/ Conclusion: No matter how much hi-vis you wear, it makes bugger all difference, unless drivers think...
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    10/2014 Received Schwalbe Marathon-Plus tires with poor QC

    What you have there looks like a tyre not correctly seated on the rim. I measured off the screen and the tyre seems to be tucked into the rim more on one side. It would be more accurate if you measured the tyre in real life. I have had this before with a particular combination of tyre and rim. I...
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    Petro-Hydraulic Vs. Petro-Electric Hybrids

    I'd never even heard of petro-hydraulic hybrid passenger cars until I stumbled onto this today: http://en.wikipedia.org/wiki/Hybrid_vehicle#Petro-hydraulic_hybrid I wouldn't have imagined a hydraulic drive in a passenger vehicle would ever be efficient, but it seems it can be. Advantages...
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    18650 Packs - Why Not Low Temperature Solder?

    Some basic info on low-melting point bismuth-based alloys: http://en.wikipedia.org/wiki/Wood's_metal A quick google search reveals there are many industrial low-temperature solders available. The lowest I saw claimed to be liquid at 7°C! I suspect mechanical strength may be lower than the...
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    RC LIPO Combustion Process

    Having spent some time last night watching videos of people deliberately lighting off RC lipo pouch batteries by over charging (and in some cases mechanical puncturing after over charging), I'd like to discuss the probable combustion process and how it might be best contained. This is all based...
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    If only I had a use for this...

    http://www.ebay.co.uk/itm/Electric-motor-brushless-90-kW-for-truck-van-vehicle-kart-motorcycle-hybrid-car-/271415009206?pt=UK_Cars_Parts_Vehicles_Other_Vehicle_Parts_Accessories_ET&hash=item3f31985fb6#ht_101wt_1155 I have no idea what it is or what the spec is, only that it's listed as 25KV and...
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    Lyen 12 & 18 FET Current Capability

    I see these have a current rating of 45A and 65A respectively. I'm guessing these are continuous battery current ratings? Realistically, how much phase current will these take in regular use (peak and continuous) with beefed up traces and possibly the addition of the odd capacitor, if...
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    What on earth are these motors?

    http://www.ebay.co.uk/itm/Two-Honda-DDW2015-DD-150W-brushless-wheel-motors-with-built-Drivers-Logic-/331136316891 I can't begin to think what Honda might have made them for?
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    Bicycle "Shimmy" Causes

    I stumbled across this article earlier which explains a little about stability and the causes of shimmy (speed wobble): http://www.spectrum-cycles.com/geometry.php I found it informative so thought I'd share it :)
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