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  1. APL

    Axial Lifter?

    Thanks for your experience with props and noise levels amberwolf, I would think the props should be separated by some distance as well, and the noise level of these things has always sat uneasy with me. It would be nice to have a quiet lifter for once. I have always liked the 'electric' DIY...
  2. APL

    Axial Lifter?

    I was thinking of both fans in the same duct, like this image. From what I gathered, the top prop is powered less than the bottom one. But yea, trying to power both fans without inner and outer drive shafts won't be very clean, and with the drive shafts the motors won't be cooled. Looking...
  3. APL

    Axial Lifter?

    Thanks red, I should build something relatively normal, I do tend to get carried away, ha!, and it's always fun to speculate. I agree that the counter rotating impellers might be the best thing going on here, and I need to get back to that idea. I have to figure out how to get air to the bottom...
  4. APL

    Axial Lifter?

    Yes, I wonder about the efficiency, there's got to be a reason why 4 prop drones won out. I'm thinking weight and the fact that they are probably not very good in the wind. with all that area. But it all depends on use I guess, and being able to get close to things is a big plus,.. your right...
  5. APL

    Axial Lifter?

    I like things that hoover, I don't know if I would ever get around to a human size version, but you never know. One you could ride on would make an awesome leaf blower for the yard though! :D On a more serious note, we can always use ideas for safety against things like floods, tsunamis, and...
  6. APL

    Axial Lifter?

    Bingo! Thanks amberwolf, that's exactly what I was looking for! I knew that this had to have been done before and that I was probably trying to reinvent the wheel. :| (Either that, or it simply had no chance of working.)...
  7. APL

    Axial Lifter?

    Thanks red, I am enlightened. That 14 psi air pressure thing is freaking me out,.. in fact this whole thing is freaking me out. :wink: Not used to thinking about lift this way. A stationary wing is definitely an odd duck. There's a lot of square inches under a wing, and 14 pounds for every one...
  8. APL

    Axial Lifter?

    Awesome news guys, looks like the wing-thing is still flying. (theoretically) Amberwolf, you talked about airspeed, and I've been struggling with thought experiments on what that might be for something like this. I know there's tons of formulas, and it's been a well beaten path for the last...
  9. APL

    Axial Lifter?

    Thanks for the awesome info red :thumb: , I expected to see this craft in a heap of rubble this morning, but so far it just has some good size bullet holes in it. :) I've seen the Avrocar and Vought V-173, but the Avrocar is apparently a vertical thrust fan with some side ducting, (might be...
  10. APL

    Axial Lifter?

    Fun, fun, fun. I've been thinking about a ducted circular wing lifter for years, but recently the idea of a counter-rotating coreless axial prompted me to draw one up. Seems to fit together nicely, has balance and symmetry, but,.. does this thing have a chance in hell of getting off the...
  11. APL

    APL's V4 Cruiser Build.

    No problems with the throttle response electric_nz, go for it and let us know how it goes. The more info the better. Thanks for the info E-HP, glad to hear you've had experience with one of these controllers too. I couldn't see any difference with the soft start jumper either.
  12. APL

    APL's V4 Cruiser Build.

    Sorry for the late response flez1966, I need to check in more often. I've been busy with some non-E bike projects the last few months. :lowbatt: No, I haven't found any software for it, in fact it's hard to find any info for it other than a few advertisements and a short wiring video. I think...
  13. APL

    DIY Toroidal Axial Flux PM

    Beautiful, that's looking really tight and professional. :thumb: Super nice machine... Bring on the copper!
  14. APL

    APL's V4 Cruiser Build.

    Got it. Just curious, I don't remember building anything with multiple FETs, and a Google search wasn't very clear on the drain/tab connection. Figured as much, but also know that they won't invest one more penny than they have to, so sometimes improvements are easy. I'll leave well enough...
  15. APL

    APL's V4 Cruiser Build.

    I never really intended to pedal it, mostly for the lawyers, but it has got me home a few times. It has a set of super short cranks on it which doesn't help,.. I should try some longer ones and see what I can get away with for clearance, and your right, I should fool around with the front...
  16. APL

    APL's V4 Cruiser Build.

    The pedals are only good for about 10+mph depending on how fast you want to spin, just enough to say it's a bicycle, but any kind of hill will make me want to get off and push. I thought about putting a small BB mid drive unit on it, but that might be a bit weird, and even more weight. I'm...
  17. APL

    APL's V4 Cruiser Build.

    Thanks thundercamel, the controller has a three speed connector, and I put a MC-horn push button on the high speed option. I push the button at about 30mph, :06 in the video,.. then there's a short lag, and starts to come on again at :07, then tapers off at around 47 - 48mph. It will only hit...
  18. APL

    APL's V4 Cruiser Build.

    Well I think I might finally have the CA calibrated and dialed in. Another blunder on my part,.. turns out that the China watt meter has two shunt ranges, 50A/100A and needs to be consumer set. Guess a guy should read the instructions. :oops: Went back and set the CA shunt to .765 mOhms, and...
  19. APL

    APL's V4 Cruiser Build.

    Thanks mxlemming, that's good stuff to know, I guess I don't know that much about fuses,.. I'm used to the little glass tube thingies that seem to blow in an instant. Thanks for the charts! Good to know that the 60A fuses can take a while longer and a bigger load before they go pop. Turns out...
  20. APL

    APL's V4 Cruiser Build.

    I tried using the high range mode, but don't really like the mental decimal conversion, and realized that both ranges were reading exactly twice the watts that the China meter was reading. (Also found out how to zero the amps, so that the watts read 'zero' on the display screen at rest) At...
  21. APL

    APL's V4 Cruiser Build.

    Back in the sadel. :thumb: The Magura 220mm rotors and Jagwire disc brake pads arrived while I was gone, so I spent the last few days wrestling them onto the bike. The usual adapter fiasco ensued, but I think I have them pretty close and just need a little fine tuning. Next up is a 4 piston...
  22. APL

    APL's V4 Cruiser Build.

    Good to know that those meters are somewhat close to accurate, I have the same meter and shunt. Thanks thundercamel. :thumb: So when I compare it against the CA reading it should at least get us a little closer to the truth. Think I can hook them both in parallel to the shunt, so I can view...
  23. APL

    APL's V4 Cruiser Build.

    The cheap 100 amp shunt I bought is suspect for sure, it's rated at .75mv, (here we go with the low levle Chinese stuff again.) :oops: It comes with a meter though, and I plan to hook it up for comparison. Grin Tech says 100A+ shunts are rated at 1.00 mOhm, and the small plastic potted CA...
  24. APL

    APL's V4 Cruiser Build.

    OK, I road it through the speed sign today, and the sign and CA both read 31 mph, so at least that part of the mix is spot on. :thumb: Checked it twice. I'll try to check the CA/shunt accuracy next, but I usually take the week of the 4th off to see the family, so it'll probably have to wait...
  25. APL

    APL's V4 Cruiser Build.

    The bike is pretty quiet, other than the new front freewheel on the cranks that I just bought, sounds like a roller coaster, but I can't really hear it much until I pass something and the sound gets reflected back. Mostly the wind is the main noise of course, and it's defining, I've tried...
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