frogger

Packs arrived, just need to bunch them, package them, waterproof them (to some degree) and then go for a ride.

Absolutely nothing wrong with tinkering and improving! Hopefully Oset takes these comments on board as positive feedback and make a good product even better.

I'll post up the details/pics when I have the lipo conversion done but I have ordered 6 x 8000mAh 3S1P packs. I will connect 3 packs in series twice (which gives me 2 x 9S1P packs of 8000mAh at 37.8v) and then parallel the 2 packs together which gives me 1 x 9S2P pack of 16000mAh at 37.8v charged. http://www.hobbyking.com/hobbyking/store/%5F%5F16225%5F%5FZIPPY%5FFlightmax%5F8000mAh%5F3S1P%5F30C%5F.html There will still be 6 x balance leads but I have a great little charging station that has 3 x 4cell chargers connected together so I can charge 3 packs a time. Not cheap though, $340 shipped with additional connectors and I am sure the UK tax man will want his cut too.

I agree with you petrg. I would much prefer it to be super smooth and it should be, specially with a brushed motor. Think I will get a Kelly controller ordered soon as the lipo's arrive.

Spoke to Ian today and he re-iterated that the 36v was designed to work this way so that kids can get good drive off the bike to loft the front wheel up and get over obstacles. I can see that with my boy, he loves the kick. But... For my little girl it's an issue and my lipo upgrade will make the problem worse so Ian did recommend trying the Kelly controller. He said they had very good results with it. Very helpful, Ian said he will try and help me through the wiring if I decide to buy it. I have decided to hold off for a bit, complete the lipo upgrade and give my little girl some more time on the bike to see how it goes. In a weird way I actually think it might teach her more sensitive control with the throttle but time will tell.

Mine is brand new. Bought 3 weeks ago. My son who is almost 9 has no problem with the throttle, he is used to a KTM 65 2stroke but even then I can still see the rear wheel spin when he opens the throttle. It's when my daughter who is 5 and is very inexperienced tries to ride it that it's a big problem. I know the 36v is designed for more experienced riders but it should still be ultra smooth, no reason for snatchyness.

I am going to call Oset tomorrow for help on which controller to buy exactly and how to fit. Will post whatever I find out. My 8000mah lipo's are ordered. Should make a nice 16000mah pack. I'll post up my results on that too. I need to get the snatchy start sorted because the lipo's will bump the voltage up a bit so my fear is the snatchyness will be exaggerated.

I have the same issue as you. I need a fix too.

http://www.trialscentral.com/forums/topic/26157-new-oset-owner%3B-throttle-response/

Me and my 8yr old son use these for when we ride our dirt bikes: http://www.cardosystems.com/scala-rider/scala-rider-q2-multiset It means I don't have to shout at him because of the helmets, we speak at normal volume level and no need to press any buttons to talk. They are absolutely fantastic. Highly recommended.

My current plan is to go for 6 x 8000mAh 3SP1 packs, 3 in series (11.1v x 3) and then parallel (8000mAh x2) them up which should give me 16000mAh at 33.3v (37.8v charged). I will charge the packs in banks of 3. http://www.hobbyking.com/hobbyking/store/uh_viewitem.asp?idproduct=16225 I already have a great charging system setup for my RC vehicles. It's a high power 12v PSU with 3 x Cellpro Multi4 chargers fitted in a handy suitcase.

I'd be interested. Any more details/pics?

Seems like I need to get our lithium packs sorted sooner rather than later hey Nick!?

We race electric RC at national level so we are near anally retentive about our cells. We monitor at the cell level + balance our packs every charge. These days our ESC's can be set for different cell types (NiCd, NiMH, Lipo, Life, etc.) and have built in low voltage cut off that can be adjusted at 0.1v increments. We used to use standalone LVC's from Novak, Cellpro, etc. but they are no longer required due to the ESC having it built in. It doesn't matter too much if you monitor at overall pack voltage as long as you balance your cells regularly. You don't normally set the cut off to kick in at the lowest possible point, you set it incrementally higher so that you have a buffer. We have done many tests amongst flyer friends of ours who use 4 - 6 cell packs, some of them will fly with their packs the whole season long without balance charging them and then when we stick them on the balancers they end up near perfect or maybe one cell will have a 0.2v difference over the span of 13 month regular charging. It's not guaranteed but that is what we have seen. I'll do a little more research myself but ideally I would like a hard wearing, waterproof LVC I can plug in between the pack and controller that will sound a buzzer when it reaches a pre-set overall pack voltage so that my kids know when it's time to head back. I don't even want to have to think about it. Even better would be if Oset can build it into their controller.

I am very familiar with using lipo batteries in RC applications and would love to build some packs for the Osets. When using lipo in my RC cars I would never consider using without low voltage cut offs because of the dangers associated with a discharged lipo. Has anyone found a reliable lipo low voltage cut off device that can be fitted to take the guess work out of running the packs down? The ones we normally use are tiny little things meant to be used between the ESC and receiver so not ideal in this case.