RE: HK Small Bolt Hydro same as HOTR
competition as in Europe in some countries. Greetings, beejay1
Posted on: 1/1/2012 8:07 AM by Author "beejay1" in the forum "Speed - Electric"
http://www.rcuniverse.com/forum/fb.asp?m=10885707

RE: HK Small Bolt Hydro same as HOTR
That is looking great! You have certainly a lot of space now. An outrunner will certainly be a good alternative for the stock motor. Cooling this type of motor is a bit tricky. You can take a watercooled motormount or put a cooling between motor and mount such as an esc cooler. Perhaps you can take an outrunner who creates an airflow such as a Turnigy Typhoon 2215H motor (3550kv). This is also a good alternative. I have this Typhoon motor in a small mini mono hull, even on 2s it runs great. I hope you can hold the 4200 kv Bolt on the water, corners would certainly be taken with lesser speed! Looking forward to your testrun!
Posted on: 8/27/2010 3:31 PM by Author "beejay1" in the forum "Speed - Electric"
http://www.rcuniverse.com/forum/fb.asp?m=9963804

RE: HK Small Bolt Hydro same as HOTR
I tried the little Bolt again, this time with still the same esc but with an other lipopack (1500 mAh zippy 20s) and that gave no problems. Runtime was about 6 minutes for mostly -or as long when possible- at full speed. Temps were ok, and a slight bit of water in the boat but that was only in the little sponge at the left side. The backup esc (Turnigy plush 40 Amps watercooled) will remain in the box with the small Bolt, you never know! It is programmed for 3S with soft cuf off (reduce power when it reaches 9,6 V) and Cut off treshold at high (3,2 V per cell average). It looks like the first pack was appearently not that good, although earlier tests with a continue 15 Amps discharge at home showed no indication of a bad pack or cell... But with this pack it runs good again! Runtime or better capacity of the lipo must be some more for races in future (mini hydro). The weigth of the lipopack is still restricted till 140 gramms, all in... With a nice 1700-1800 mAh pack it should do the trick, now we have to look for such a 3s pack... It will be difficult to find. Greetings, BJ
Posted on: 8/27/2010 9:26 AM by Author "beejay1" in the forum "Speed - Electric"
http://www.rcuniverse.com/forum/fb.asp?m=9963087

RE: HK Small Bolt Hydro same as HOTR
Voltage of battery was 3,86 V readout after the run. Pack was fully loaded, everytime with a balancer. The 1550 mAh lipopack (20C) was ok, I normally storage it on 3,8 V per cel. Today I have discharged it after fully loaded, and after 4 minutes and 15 A full discharging all 3 cells where 3,55 V. it tooks about 8 minutes for fully discharge (1436 mAh total readout). Temps where about 100 F/45 C. So the pack seems to be ok... I tried to get into to program settings of the esc that comes with this Bolt, tried the manual of nickster46 and even with a program card but it seems not programmable... Only thing you hear -in different stick positions of the transmitter- is the 2 short 1 long sound that may should give an automatic setting of your stickposition as mentioned in the manual of nickster46. Next time I try a different pack and, if it slows speed again after 3 minutes, with a different esc it should give some answers... We will keep trying! Greetings, BJ
Posted on: 8/23/2010 11:40 AM by Author "beejay1" in the forum "Speed - Electric"
http://www.rcuniverse.com/forum/fb.asp?m=9953986

RE: HK Small Bolt Hydro same as HOTR
Decrease in power is after a minute of 3 almost total, and than the boat stops. Wait a half minute, and I can run again full speed but almost direct the boat slows in speed again and stops. I can not see if the watercooling works behind the boat (too much waterspray!), but motor and esc are not warm and I see water in the hsilicone tube, so I assume that the watercooling works well. I measured the pack, it was 3,86 V each! So I suspect the ESC is not working as it should be. A different esc with proper cut off should give the answer. I try if this standard esc is indeed programmable, just try out some things and some 'Mystery' or 'Suppo' programs. Maybe even a hobbywing program card can perhaps give an answer... we would see. Greetings, BJ
Posted on: 8/23/2010 7:19 AM by Author "beejay1" in the forum "Speed - Electric"
http://www.rcuniverse.com/forum/fb.asp?m=9953523

RE: HK Small Bolt Hydro same as HOTR
Yesterday I did some runs with the small bolt again, with a shrinktube between shaft and strut, and with some sponges in the hull. This looks like the solution, there was no water in the boat. It seems that the esc can do his job (not warm at all, just as the motor and lipopack) but everytime after a minute of 3 the esc starts to decrease the power. I also had this with another boat with the same type of esc. I find these esc's a bit strange, it seems you can not adjust this esc at all, not to you own transmitter, or different cut offs, etc. Does anyone know how you can program these esc's? I'am not shure if the cut off is set properly... Normally you must run more than 3 minutes, with these boats and standard motor, even with standard prop and in my case a 3s/1500 mAh lipopack. Maybe a watercooled Turnigy 40 amps plush or sentry can give the difference? Greetings, BJ
Posted on: 8/23/2010 6:18 AM by Author "beejay1" in the forum "Speed - Electric"
http://www.rcuniverse.com/forum/fb.asp?m=9953488

RE: HK Small Bolt Hydro same as HOTR
, beejay1
Posted on: 8/17/2010 9:22 AM by Author "beejay1" in the forum "Speed - Electric"
http://www.rcuniverse.com/forum/fb.asp?m=9939506