Its a little difficult to know where to post with 2 threads now running but this post is about some further testing I have done over the past week so this spot seems most appropriate.
I received one of the lower cost Turnigy 85A ESCs to test with a 63-74 motor. This is the ESC. http://www.hobbyking.com/hobbyking/store/uh_viewItem.asp?idProduct=10331&Product_Name=Turnigy__Brushless_ESC_85A_w/_5A_SBEC
Its a bit of a pain to program as its done with throttle position rather then a programming card so decided to leave it as it comes as this is the most likely way most would install it.
Bench tested it first. The soft start seemed acceptable however start-up sync at light throttle was quite jittery and as such didnÃ¢â‚¬â„¢t inspire an heap of confidence. It doesnÃ¢â‚¬â„¢t get a great rap on the feed back section of website either but what the heck, if goes up in smoke its only $45 wasted.
Firstly the ESC is a perfect fit for the drive and was very straight forward to install. I did all testing with 5S and used my trusty folder. (the same bike as on the TV show) To my surprise, the ESC worked perfectly. The throttle response was quite linear using a servo tester/Magura 5K throttle, and showed no sync issues under load at low RPM. All testing was done by peddling to 5mph then applying throttle in a smooth fashion. Everything from low throttle to all the way through to full throttle operated without an issue and actually felt as good as any ESC I had tested to date.
I would like to point out that I was not particularly aggressive with the throttle but accelerated briskly enough to a speed that felt too quick for this type of bike.
Now I have only run 15AH through this ESC so I have no idea if it will stand up to constant duties but as far as sync ability and throttle linearity, the ESC preformed quite acceptably. I will leave this ESC in the prototype drive and see how it stands up over the next few weeks.