skullforger Posted September 27, 2015 Share Posted September 27, 2015 Hi,This week, I bought an IPS 121/T350 from GoWheel.com (excellent service btw). It is my first EUC. After a couple of hours of intense practice (steep learning curve!), I am now able to ride it more or less ok. The only thing is, I seem to hit the tilt-back and beep limits quite soon (flat and smooth road, no hills, low speed). This may have to do with the fact that I weigh 120 kg, but I'm not sure.From what I've read on the forums, the max speed of the IPS 121/T350 is 19.9km/h. Is this for a person with normal weight, and will it be lower for a heavy weight guy like me? Also, does the tiltback and the bleeping start when a certain current is drawn, or a certain voltage drop is experienced (which would be safest), or is it just speed-based?Also, what is the difference between tilt-back and beeping. If I get the tilt-back, I can still push a bit harder until the beep. Is it safe to just stay below the beep-speed (which seems at least 5km/h faster then when the tilt-back kicks in)?So how do these things work:1- heavy people just reach the limits sooner and can't reach the normal max speed of 20km/h because everything is limit based?2- it is speed based and tilt-back kicks in at predefined speed and then bleeping also at max speed of 19.9 km/h Thanks a lot. Link to comment Share on other sites More sharing options...
Gimlet Posted September 27, 2015 Share Posted September 27, 2015 Not sure about the 121 but my 132's tilt back early when I'm going up the steep hills around my area. I'm 90kg and on the flat I can get about 16 kph but on the hills I get tilt back at much lower speeds. Link to comment Share on other sites More sharing options...
skullforger Posted October 3, 2015 Author Share Posted October 3, 2015 Ok thanks for the info. Can anyone confirm this?I think this is actually quite a big deal because that would mean that all the speeds everyone is talking about in the specs, are just for your 'normal' 70 kg person. I think the max speed could actually be only 60% if you're heavyweight like me. Link to comment Share on other sites More sharing options...
Chrisxr2 Posted October 3, 2015 Share Posted October 3, 2015 It am 96kg, my Solowheel tilts back at about 18 km which is spot on. You would have to have quite an underpowered wheel to not achieve top speed before tilt back Link to comment Share on other sites More sharing options...
MrBump Posted October 3, 2015 Share Posted October 3, 2015 It am 96kg, my Solowheel tilts back at about 18 km which is spot on. You would have to have quite an underpowered wheel to not achieve top speed before tilt backWhether a wheel can hit 'top speed' before tiltback is entirely to do with how much power it has left at the 'limit' to save you if you hit a bump. However much power you have, if you use it all on speed then a bump is going to lead to a faceplant.Also, depending on how the tilt-back kicks in, some wheels allow you to keep pushing. Link to comment Share on other sites More sharing options...
Jason McNeil Posted October 3, 2015 Share Posted October 3, 2015 Hi @@skullforger, it's Jason from WheelGo. Thanks for the commendation! In our testing, tilt-back engages at around 17kph on the 121; however, there is still another 2-3kph left in it, before the degree of tilt becomes to great to apply more forward force. With most 'brand' Wheels, the limiter will be enabled for both speed & power. That is, if you're going up a hill, the alerts & tilt-back should be kick in before the 17kph. The 121 is a decent climber, has excellent torque but please be careful with sudden accelerations with this model, if too aggressive it can cut-out. Link to comment Share on other sites More sharing options...
skullforger Posted October 4, 2015 Author Share Posted October 4, 2015 Thanks for the replies.I could be wrong but I don't think the EUC can tell the difference between a heavy rider and going uphill. Both just draw more current and cause a bigger voltage drop. So again, this would mean that tilt-back/alert speeds are lower with a heavy rider, or that the safety margin for heavy riders is much smaller. It has to be one or the other, or a little bit of both. Still I think this is a big deal. Link to comment Share on other sites More sharing options...
skullforger Posted October 4, 2015 Author Share Posted October 4, 2015 I just did a couple of test runs on a flat road, no incline, no wind, with various GPS speedometers and I can't get past 15kph because of the tilt-back, and I pushed quite hard. I guess I can push even harder but I didn't dare because a cut-off would mean a really nasty fall.Is it safe to push beyond tilt-back until the warning beeps? Also @Jason McNeil , isn't there any more precise description available from the manufacturer explaining when and how the tilt-back kicks in and when the warning beeps do etc? There's nothing about those in the manual, and the cut-out stories really have me scared now. Link to comment Share on other sites More sharing options...
Jason McNeil Posted October 5, 2015 Share Posted October 5, 2015 All Wheels have limits, comparatively the 121 is pretty good & the tilt-back in most cases prevents the rider from overpowering the limits. Definitely agree there should be better clarification on the speed thresholds of the pedal tilt-back, warnings & absolute top-speed. On a running track with a GPS & stop-watch we were able to accurately measure the 19.5kph max speed, but realistic 'cruising' speed is about 18kph. Link to comment Share on other sites More sharing options...
skullforger Posted December 21, 2015 Author Share Posted December 21, 2015 Hi @Jason McNeil, how exactly did you measure the max speed of the 121? Do you keep pushing it past the warning signal, and if so, how far past it? Until BMS shutdown? Also, if you're hugging the speed limit constantly, with the warning beeps sounding, like the guy in the following video does, will there be a final 'extra tilt-back' making it impossible to shutdown the unit? Or is this a dangerous thing to do with a constant threat of sudden shutdown? https://www.youtube.com/watch?v=Pvqpfzzlq3Y Link to comment Share on other sites More sharing options...
Jason McNeil Posted December 22, 2015 Share Posted December 22, 2015 @skullforger my definition of 'cruising speed' = under the audible alarms & 'max speed' (on the 121) = pitch of the pedals make it physically very difficult to lean any more. Recommended practice is keep below the audible alarms with this model. Link to comment Share on other sites More sharing options...
Cloud Posted December 23, 2015 Share Posted December 23, 2015 @skullforger the max speed tilt back will not depend on your weight and will kick in when its supposed to as preset for your wheel. The max power tiltback will depend on your weight and can kick in earlier. Now, the max power tiltback is more likely to kick in not when a heavy person is moving fast but rather when a heavy person rapidly accelerates. That will stress the system much more. If you accelerate as slowly as possibly you will find that you can attain much higher speeds before tilt back. i am 100kg and have no problem accelerating to the speed limit with no tiltback. Althout, 20 kg matter, and when i do my laundry on the wheel i carry an about 10kg bad with clothes in each hand and ride to the laundromat. My weight is 120 kg at that time and i do feel the wheel somewhat struggling. In general just accelereta as smoothly as possible. Also pick a smooth pavement when testing to make sure no additional power is drawn to kee you stable over the pvement irregularities Link to comment Share on other sites More sharing options...
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