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  1. Farfle

    Farfles Electric Ultralight.

    Heya all!! Started this project around the beginning of the year, and have made enough progress to post it up on the forum. Heres some stats: Airframe: Belite Ultracub Motor: salvage Zero 75-5 IPM Battery: Farasis 29AH 28S4P pack Controller salvage sevcon Gen4 Size 4 Bms: None Charger...
  2. Farfle

    Ultra power dense charger project.

    Heya all, Under the advice and guidance from some very bright folks, I am starting a charger project. This will mostly be for E-motorcycle and car sized things, but the topology should work for anything. First off, this is a "big boy rules" charger that is for those who know what they are...
  3. Farfle

    Triple solid slot Zero 75-7

    Hello all! I have an exciting project to share with you! So, Farasis purchased the DP1E (the zoomy portland-made carbon fiber track car that Luke, myself and a handfull of others raced at refuel last year) Anywho, right now Its got a crappy Remy HVH250 that makes a super lame 100KW and needs a...
  4. Farfle

    2015 Zero Mod thread

    Heya all, I just picked up a 2015 3 brick (9.4) DS, and I have a looong list of mods and fixes to do. In the interest of spreading the knowledge on how these bikes go together (as well as general reference) ill be posting up some guides here. Hey, there is high voltage here! Unplug the bike...
  5. Farfle

    Farfle's Mk 4.5 outrunner

    Here we go again! have about 1300 bucks and a second sevcon rounded up :D :D :twisted: This one is slightly larger diameter, segmented magnets and less poles. Hoping to break triple digit horsepower to the ground, but would be happy with 80 or 90. Controllers will be twin size 4 sevcon...
  6. Farfle

    Mk. 4.5, the better E-Tard

    Heya all, After flogging the crap out of mk.4 for a season, the already three year old battery took a dump over the winter. I have some new cells, but they dont fit into Mk.4's skinny frame. So, I am building a new frame and re-using the swingarm, forks, motor, wheels and concentric pivot...
  7. Farfle

    Bullet resistance of assorted Ebike Parts.

    Heya all, its exactly what It sounds like. I have some somewhat defective, but still shoot-able reloads, and I have some otherwise unusable Ebike parts. (don't worry, its nothing that could be used or even repaired by most folks). So I am going to take the Gopro out and record some footage of...
  8. Farfle

    ANGRY INDUCTIVE HEATER!

    Heya all, I had an interesting experience with the heater in the Porsche. It seems to have a significant amount of inductance, and at 100v and 18ish amps, it's very difficult to switch. It DESTROYED the 20A OEM relay I started with, so I went back and got a big honking 50A switch with large...
  9. Farfle

    Farfle's Mk.5 Super badass outrunner

    Hello all, I am about ready to start designing a new Outrunner for next years race bike. And would love your input. My goals: Less than 300mm outer diameter Less than 100mm total width Around 100 horsepower output Less than 60lb or 27.2 kg Liquid cooling is ok Total cost under $3500...
  10. Farfle

    Hey! I thought of that! thread

    Heya guys, I saw something today that I had tried on my motors with great success, and had never seen anywhere else. (Tig welding the copper phase connections instead of soldering/crimping) and while working on an 8fun motor I saw MY IDEA! :evil: :evil: :lol: :lol: Anywho, I bet this isn't...
  11. Farfle

    Cromotor redundant hall wiring combo.

    Heya guys, I just had to help somebody in michigan trade over to the redundant halls in his cromotor, So I am posting that info here for future reference.
  12. Farfle

    twin AC35 Porsche 912E

    Heya all, Helping my boss convert a Porsche 912E. The car is in very usable, but not exactly pretty condition. The trans is in good shape, its got disk brakes and some mostly shagged yoko sport tires on all four corners. Paint is falling off, and the unibody needed some cut-and-patch near the...
  13. Farfle

    Farfles new tool

    I have just inherited a busted plasmacam system that had a dead PC. Very long story made very short, it works now. Supposedly good for .005" tolerance, and with the plasma unit (full of rodent feces, may need some work). It should cut 1" plate steel. Anywho SOOOOPER STOKED!!! picking up some...
  14. Farfle

    Farfle's New motor. Here we go again!

    Heya all, I have decided to start from scratch on the new bikes motor, and starting from what I have learned. This new motor will be slightly larger in diameter, similar in width, and with segmented magnets. Flux gap dimensions will be 205x84mm. At this point I am thinking 12 teeth and 10...
  15. Farfle

    Trading core loss for copper loss to get more horsepower.

    Heya all, I am looking to get some more power out of my outrunner; and have a problem. Wound the way It is (3 turn 26kv), the motor has little core losses (only 430w) no load at 3k rpm. Which I can probably reduce a good chunk by segmenting the magnets. (Stator lams are .26mm) The problem I...
  16. Farfle

    REFUEL 2013 - roll call!

    In case nobody knew, its June 30th, and its one of the biggest EVents in the US. Bring your EV, track it on one of the coolest tracks in the world for 35 bucks, and have a good time. Ill be down there with the E-supermoto, who else is coming? FYI laguna seca is middle of California, 2 hours...
  17. Farfle

    Farfle's electromotard. Mk. 4

    Heya guys, because the emotarpedcycleracer has evolved REALLY far, I am starting a new thread. I plan on racing with (and beating) the zeros and gassers in the M1GP race series down in socal. :twisted: :twisted: :P Here are a few shots of it in its current state. Not a whole lot of stuff...
  18. Farfle

    transformer isolated cell balancing?

    Hello all, another hair brained scheme here, but if you had a bunch of isolating transformers attached thru a rectifier to the cells at a cell level, and then fed a frequency to all of them, could you achieve anything useful? Kind of like attaching an isolated dcdc converter to all the cells...
  19. Farfle

    Frame geometry question.

    Hello all, my bikes swingarm design is giving me fits. The motor needs to be as close to the bike as possible, but to do that it interferes with the shock. If I move it up, it hits the frame, if i move it down it sticks out and reduces the ground clearance, and if I move it back, the effective...
  20. Farfle

    Racing, bumping up a level? What do I need?

    Hello all, I have to ask some advice from those more knowledgeable about this stuff. I am planning on moving from ebike racing to e-moto racing, specifically the new electric category in the M1GP that Hollywood electrics is setting up...
  21. Farfle

    balancing via attrition.

    I have a new charging strategy that I want to run past you guys. It involves a string of 5v (adjusted to 4.15v) 2.5A isolated switching power supplies all paralleled on a 110v rail, and using drbass's standardized db37 connector, it will just charge all cells individually. Here are the...
  22. Farfle

    how 'bout them lipo buzzers.

    Hey all, a friend of mine (bartimaeus here on the forums) showed me one of these little gadgets available from several retailers on the web. for those not familiar is has an lcd display that displays the cell voltages (Very accurate!!!) one after another followed by the total pack voltage up to...
  23. Farfle

    copper vs aluminum buss

    Hello all, I was looking for a material to do my bikes inter-battery buss bars with, and its come down to either aluminum or copper. The plan is to use well crimped ring terminals on the turnigy packs, and go directly to a buss bar with threaded holes. Now I know copper has the edge as far as...
  24. Farfle

    pre-built adjustable LVC?

    Besides having an idle current draw of a few mA, anybody see a problems with tossing a relay on the same leads as the buzzer, and hooking all the NC leads in series with the power in line to the controller? http://www.amazon.com/gp/aw/d/B005HG5B5G/ref=aw_d_detail?pd=1&qid=1354237068&sr=8-7
  25. Farfle

    JRH, read this!

    I can't return a pm from the spoke man :shock: . If you see this JRH , the wheel is 36hole, and the dropout width is 7.5"
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