Model Boat Mayhem
The Shipyard ( Dry Dock ): Builds & Questions => Pleasure boats, Sports, Race, Power and Leisure Boats: => Topic started by: GarthT on November 18, 2022, 06:40:55 am
-
Some time ago I acquired an early Mack Legend kit of this boat. I made a start and put it aside, but I now plan to build it this winter. The boat is 31.5 inches long. Mack sell a power unit which is a 3660-1650 water-cooled motor (I assume inrunner) and a120 A esc. However they don't have a UK distributor and, in any case it seems expensive. I also wonder if it's more power than is really needed for a scale model.
Also I'd like to avoid water-cooling if possible, particularly since I wouldn't intend to run it for very long periods. I've looked at the Hobbyking range of outrunners but it's a bit of a jungle. I've also looked at Overlander gear but their escs are not reversible. Any suggestions? Also battery and prop.
-
Hi Garth
I'm using Overlander motors in all my builds and would say one of their 35mm diameter motors would fit the bill. One between 900 and 1200kv, as 1650kv is a bit high for the type of boat, would provide more torque.
I haven't run the boats yet but did a lot of reading on forums etc. before arriving at my choices. Like you I wanted to avoid water cooling and the motors are over size so that they don't work hard.
I wanted to use their ESCs as well but as you say they don't do reversing ones. So I've standardised on the HobbyWing Quicrun and Seaking ones - from Wheelspin Models for example.
Hope this helps.
Chris
-
Hi Garth
I use the Hobby king 35mm 3648-1450kv with a car 120A ESC with reverse in my Huntsman.
Prop 42mm two blade.
Runs a good speed on 3S, 4S fast and on 4S Nano Tech dam quick.
Using the same setup in my MFA Spearfish, Solent Spear and Spear boats which I am building at present.
Hobbyking is having a special on these, under half price !!!
No water cooling required.
Harry
-
Thanks Chris and Harry for your input.
I couldn't find the particular Hobby King motor mentioned but there's a whole range of 35mm outrunners, for example, Turnigy SK3 3542-1250kv. Would that do the trick with a 3s lipo do you think?
-
Sounds good to me.
Chris
-
I found Harry's recommendation but it's out of stock.
-
Hi GarthT,
Have a look these [size=78%]https://www.noahsrcark.co.uk/products/d686c441fe/131444000002103405 (https://www.noahsrcark.co.uk/products/d686c441fe/131444000002103405)[/size] also have a look at my post of Vintage SX100 tunnel hull that use there outboard which uses this motor. I’m running it with a 120a ESC and 14.8v 4c battery packs.
-
Dave - I don't think that is suitable for the type of boat Garth has and the way he is going to use it - educated guess, tootling around with some higher speed runs, like me and my Faireys, the kv is too high, alright for a race boat like yours, and it's an inrunner which are generally better for high revs.
Garth - Harry and Zooma both use the motor that Harry mentioned. It tends to go in and out of stock. Bear in mind Harry is a speed freak!
Chris