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Bob Eisenman

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About Bob Eisenman

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  • Birthday October 5

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    Male
  • Location
    Salem, MA

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  1. Bob Eisenman

    Wheels for heavier riders?

    If it helps...my ACM pedal replacement looks like this with pedals folded up.
  2. Bob Eisenman

    Wheels for heavier riders?

    Do you have hard to see cracks where the pedal bonds to the region near the hindge? You shouldn't need shims. The shear off points on the pedal underside looked like this when my ACM pedal failed.
  3. Bob Eisenman

    Wheels for heavier riders?

    Rationalizing a pedal snap is a good teachable moment on the engineering topic called 'creep and craze'. A graduate student at MIT once told me his thesis was about 'creep and craze'. Hevsaid that if you think about what repetitively bending a thin sheet of plexiglass looks like....first you see tiny cracks forming parallel to the material bend......that's called 'crazing'. As you continue to repetitively bending the material the tiny cracks become more numerous and start to combine head to toe to form recognizable 'cracks'......and ultimately the material fails under load. Engineering types pre-evaluate and compute how much deflection, which material, etc fail under repetitive bending stress. A possible example of use: The people who design and maintain airplanes made out of aluminum or whatever composite they choose at a given position aboard need to know how much repetitive stress a wing, or other aircraft part can take before the process of 'creep and craze' makes the part unsafe and in need of replacement. Obviously I'm not an engineer but you probably get the idea that EUC pedals are subject to creep and craze' processes that are EUC mileage, pedal material , rider style , rider weight and terrain dependent. ***** My Ninebot One E+ pedal fail was on one of two hinge points on the dominant foot pedal (right) at 4168 miles. It was a 'saggy fail' incident with one hinge point holding the pedal on. ***** My Gotway Monster pedal fail was on both hinge points on the dominant foot pedal (right) at 4694 miles It was a 'clean break fail' incident. *****
  4. Bob Eisenman

    Wheels for heavier riders?

    No trouble during tonight's ride
  5. Bob Eisenman

    Wheels for heavier riders?

    Not this time. Just a clean unexpected (not pre- ride inspected) break. I lost the 'shims' but you can buy ACM bolts and shims separately from the pedals. I broke a Ninebot One E+ pedal that flexed alot like you described before replacing it following a walk off.
  6. Bob Eisenman

    Wheels for heavier riders?

    Level street ... No ruts...thought I ran into a pot hole I didn't see... noticed that the pedal was sheared off after falling....no traffic behind me.... walked the EUC off the road.....train stop back to apt. was two blocks away. The sidewalks I use in that ride area are really lumpy. The fall ripped my jeans (not my skin) from about over the ankle to the cuff....probabbly caught on some residual pedal part. Shirt was unscathed. Wrist and wrist guard pressed into my chest.....no visible bruise but probably slightly stretched or tore a chest muscle.....still a bit sensitive if I cough...almost all better now...wrist sprain getting better. No time to react....just a chested fall to the road.....total surprise for this heavy rider who rides a little slower since then. Was wearing gloves, helmet, wrist, elbow and knee protection. Just turned over 8,000 km on the Monster. Good luck with the business...nice videos of people enjoying themselves on EUCs.
  7. Bob Eisenman

    THE VIDEO THREAD!

    Google search says SD card may be the problem https://community.gopro.com/t5/Cameras/GoPro-Hero-6-heating-up/td-p/191549
  8. Bob Eisenman

    THE VIDEO THREAD!

    Maybe it was a balloon catheter treatment for a heart blockage in adults. I've read: The surgeons feed the catheter through blood vessels to 'deploy' the balloon at the site of interest. The surgical trauma associated with opening the chest and retracting the ribs is significant. Former California Governor Schwarzenegger had a recent catheter type proceedure for a heart condition. Something unexpected (infrequent as the proceedure goes) happened and they had to open his chest anyway. Blood clots are a major concern as well since strokes may follow. Timing is supposed to be critical. "However, during this less-invasive procedure, Schwarzenegger may have experienced a complication that required emergency open-heart surgery, according to TMZ." https://www.google.com/amp/s/amp.livescience.com/62182-arnold-schwarzenegger-heart-surgery.html That's gotta be painful.
  9. Bob Eisenman

    THE VIDEO THREAD!

    Thanks for your kind thoughts. My 'Yi gimbal' picks up unwanted audio from the servos too. I was in research but not clinical. My boss had both MD and PhD credentials and would narrate events in the clinic from time to time. In her words: "Young kids (youthful) can tolerate higher levels of discomfort than adults. If you take a kid (patient) and apply a treatment or procedure......the kid is up and about playing in a few days. If you were to apply the same treatment or proceedure to an adult it might take weeks for the adult to recover'. Since Children's sees many infants in the clinics the problem that arises for the doctor/staff is that the infant hasn't the language ablity to be able to tell the doctor where it hurts, etc. To that extent the many laboratory testing resources allow diagnostic appraisal (plus comparison to reported case reviews in the literature) of the very young patients condition by using processed samples and various tests to develop a 'clinical picture' of what's going on.
  10. Bob Eisenman

    THE VIDEO THREAD!

    Never heard of using a rubber band to steady a camera but...I saw all about it in this video
  11. Bob Eisenman

    THE VIDEO THREAD!

    I saw this in a US store (Best Buy) for $99. Zhiyun - Smooth-Q 3-Axis Handheld Gimbal Stabilizer - Black Same price or less on eBay...many used ones as well. I enjoyed that video as well. **** A local bike trail was dedicated a week ago and I was videoed by a woman using a shoulder mounted to video rig. It looked heavy.....it must be stable too. ***** About twenty years ago a Finnish woman worked across the hall from me. We were both long term employees of that Boston Hospital. She (Sinnika) retired and went back to family and friends in Finland. Haven't heard about her since then. She took a picture of me working in the lab....Polaroid.....can't find it though now with all my computer clutter on hard drives.
  12. Bob Eisenman

    THE VIDEO THREAD!

    Carl....I looked at some of your photos. The bird shots feeding from hand are really interesting. The drone shot pointed down at the boats stuck at the frozen water was unique. National Geographic credits....wow. Good luck riding.
  13. Bob Eisenman

    THE VIDEO THREAD!

    A cell phone video from a recent trail ride. The 'trail' is a 20ish mile ride on roads from where I live. Hunting season for birds (quail , pheasant, grouse) which starts in October http://www.eregulations.com/massachusetts/huntingandfishing/hunting-season-dates/ must be the reason the trail road looks recently mowed.
  14. Bob Eisenman

    Wheels for heavier riders?

    Monster tire tread at 7887 km
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