techyiam Posted July 16 Share Posted July 16 1 hour ago, Rawnei said: Then maybe Zen Lee needs to change something on his Lynx. That's the thing. There are factors that can skew the results. Note: Zen Lee claims to be a paid racer. He is not a newbie. He also races on his Lynx. Personally, I like to test ride a wheel before I buy it. I did that with my S16 Pro. No surprises. I am very happy with it. I didn't have to turn it Ito a "project wheel". It rode great the way it was. Quote Link to comment Share on other sites More sharing options...
Punxatawneyjoe Posted July 16 Share Posted July 16 I will attempt again to do the pull test on the v14 today or tomorrow. The problem i had last time was the tire kept spinning up and leaving burn marks on my new driveway. It also finally broke the para cord i was using to hitch it to the scale so maybe i can use cable this time. It certainly doesn't have the software limitations that the v13 has. Pretty sure i was pushing over 12kw when the rope broke. 2 Quote Link to comment Share on other sites More sharing options...
RagingGrandpa Posted July 16 Author Share Posted July 16 4 hours ago, YCC said: My point is you have your evidence and I have mine. And you have your believe and I have mine. However, I disagree that Lynx has the strongest torque than any other wheels. That is my point. The test method is described completely on page 1. It's not complicated- please go try it and tell us what you find!  5 hours ago, techyiam said: Zen Lee felt the V14 is the torquier wheel [vs Lynx], by a significant margin. Pull force and ride feel are very different things. If you haven't caused a pedal dip, then you haven't reached peak pull force. And a 16" tire diameter will be more sensitive to rider body position, so comparing ride feel across different tire sizes is quite misleading. It's why I recommend comparing machine performance using an objective metric like pull force.  3 hours ago, Punxatawneyjoe said: I will attempt again to do the pull test on the v14 today or tomorrow. The problem i had last time was the tire kept spinning up Yup. Two people are required, for testing this modern batch of ~200lb stump pullers  On 7/14/2024 at 1:53 PM, RagingGrandpa said:  1 1 Quote Link to comment Share on other sites More sharing options...
Popular Post Punxatawneyjoe Posted July 18 Popular Post Share Posted July 18 (edited) I'm destroying my driveway and my tire, even with 2 people standing on the pedals the thing burns up the tire..... i only got 237 before the wheel broke loose again and started spinning out of control, my wife who was recording wasn't happy getting showered with burnt rubber..... I will try again but i think my knobby doesn't get enough traction on pavement. Â Â Edited July 18 by Punxatawneyjoe 4 Quote Link to comment Share on other sites More sharing options...
RagingGrandpa Posted July 18 Author Share Posted July 18 3 hours ago, Punxatawneyjoe said: even with 2 people standing on the pedals the thing burns up the tire..... knobby doesn't get enough traction Sign of a strong motor! Â Try reducing tire pressure? 1 Quote Link to comment Share on other sites More sharing options...
Punxatawneyjoe Posted July 18 Share Posted July 18 7 hours ago, RagingGrandpa said: Try reducing tire pressure? I did from the original 35psi down to 30 but i was leery about going to much lower, i didn't want to spin the rim on the tire and tear the valve stem but maybe a few pounds lower next time. Quote Link to comment Share on other sites More sharing options...
RagingGrandpa Posted July 18 Author Share Posted July 18 Concrete is also notably higher-mu than asphalt, might be time for a road trip to your nearest nicest parking lot. Or if you can find out where your local street racers prep a surface... Quote Link to comment Share on other sites More sharing options...
jtm94 Posted August 25 Share Posted August 25 I just wanted to comment to keep following this. This comparison sheet has always been greatly interesting to me, so I appreciate the effort to compile all this info together. 1 Quote Link to comment Share on other sites More sharing options...
Rawnei Posted September 29 Share Posted September 29 Who did the Lynx test? Would be interesting to see an updated test based on the new .12 firmware (330A). Quote Link to comment Share on other sites More sharing options...
RagingGrandpa Posted September 30 Author Share Posted September 30 Agreed! I will soon! 1 1 Quote Link to comment Share on other sites More sharing options...
Cebulafpv Posted October 1 Share Posted October 1 (edited) I just did the levers for testing my prototype chain drive wheel. It's just testing platform, so it looks like crap but dont worry it's not how it will look (; Â Â Edited October 1 by Cebulafpv 3 Quote Link to comment Share on other sites More sharing options...
RagingGrandpa Posted October 1 Author Share Posted October 1 That's wild! Ok, so what's your pull force and grip height? Quote Link to comment Share on other sites More sharing options...
Cebulafpv Posted October 1 Share Posted October 1 (edited) don't know yet, from calculations with current motor and gearing it should achieve only 130-140lbs but also keep in mind it's 24 inch outer diameter tire, with final gearing it should do simillar to ex30, if this project will prove to be reliable i will invest moretime, money and effort in it to finish whole euc and put much stronger motor which should do around 330lbs. That's on paper, we'll see. What do you mean grip height? axle height? Edited October 1 by Cebulafpv Quote Link to comment Share on other sites More sharing options...
RagingGrandpa Posted October 1 Author Share Posted October 1 (edited) 4 minutes ago, Cebulafpv said: What do you mean grip height?     On 10/18/2023 at 2:23 PM, RagingGrandpa said: Mechanical statics review time... A facebooker correctly pointed out that if the handle is positioned any way other than horizontally, it will create additional forces on the rope, making the rope force unequal to the tractive force. So for my data using vertical handles, tractive force (the thing we really care about) will be slightly less than my measured rope force. I think it doesn't change the meaning of the results: a relative comparison between EUC's. The ranking of models does not change. But if we think about other people testing with their own DIY handles, "handle length matters." We'll just need to add two steps to the test process: Measure and record the vertical distance from the ground to the axle center (e.g.: the rope height, with a level pulling rope). Measure and record the vertical distance from the ground to the center of where your hand grips the handle. I'll add these to the page 1 procedure  Edited October 1 by RagingGrandpa 1 Quote Link to comment Share on other sites More sharing options...
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