RE: HK Small Bolt Hydro same as HOTR
Thank you for the BEC power tip! One more thing about the 1000mAh 4S Lipos ...there is enough space to put several of those if someone likes. With 1300mAh version this is not possible due to the height.
Posted on: 11/13/2011 10:19 AM by Author "Landor" in the forum "Speed - Electric"
http://www.rcuniverse.com/forum/fb.asp?m=10809947

RE: HK Small Bolt Hydro same as HOTR
With metal propeller 1.4 x 32 mm I reached speed 43 km/h (~27 mph). Other changes to earlier configuration was that I used these for the servo: - HobbyKing HKU5 5V/5A UBEC + Turnigy nano-tech 460mah 2S 25~40C Lipo Pack I have also tested these Hobbyking batteries: - Turnigy nano-tech 1000mAh 4S 45~90C Lipo Pac - Turnigy nano-tech 1300mAh 4S 45~90C Lipo Pac Unfortunately I don't have speed info available. Speed seemed to be a bit higher than with 3S. The boat is still easy to control with 4s. Battery and motor temperatures were about 40 °C (~ 104°F). It is still good to remember that the cooling water is most likely below 10 °C (50 °F). I am very happy for the stock motor performance. I bought a Leaopard 2040 2600kv motor as spare motor but I have not needed it. During past two years I have had about five cheap, not branded chinese motors in RC cars and boats and the life time has been in best case only few batteries. Playing with this Small bolt has been very easy. When using components that you have recommended I have not managed to break anything. I tought it is a risk to test with 4S but at least first two batteries were drained without any problems. One more thing about those 4S batteries I listed above, they fit very well under the hood.
Posted on: 11/13/2011 6:31 AM by Author "Landor" in the forum "Speed - Electric"
http://www.rcuniverse.com/forum/fb.asp?m=10809600

RE: HK Small Bolt Hydro same as HOTR
Today the weather was much better... [youtube]http://www.youtube.com/watch?v=mf4yMoSEPF8[/youtube] EDIT, the Sunday run - Changed 32 mm propeller to 35 mm propeller - measured speed - measured motor temperature [youtube]http://www.youtube.com/watch?v=KIMPrpZhcI8[/youtube] Top speed 39 km/h (24 mph) Logged with Ventus G730. Motor temperature was after the run 42,5 °C (108,5 °F) - water and air temperature were only about 10 °C (50 °F) - With the 32 mm propeller the Temp was below 30 °C (86 °F) (not measured as carefully as the 35mm result) - For safe cruising the 32 mm feels more comfortable
Posted on: 10/16/2011 2:36 PM by Author "Landor" in the forum "Speed - Electric"
http://www.rcuniverse.com/forum/fb.asp?m=10766598

RE: HK Small Bolt Hydro same as HOTR
Thank you for all the information in this thread! It helped a lot ...encouraged to select this boat and to select parts for it. My configuration is: - 2604kV brushless motor, arrived with the boat kit from Hobbyking - Turnigy marine 60A ESC - Turnigy 3S 2200 mAh 20C - plastic 1.4 x 32 mm propeller EDIT: - HXT900 Micro Servo Today it as my second time in water with this boat... [youtube]http://www.youtube.com/watch?v=J-or8aVLP7Y[/youtube]
Posted on: 10/13/2011 12:11 PM by Author "Landor" in the forum "Speed - Electric"
http://www.rcuniverse.com/forum/fb.asp?m=10763493