Miss Geico 17 Brushless/Flex Drive Conversion

[Dr. Jet]

I have three or four of those motors. I use a cut-down X427 with them on the 15" H&M shovelnose hydros to keep temperatures within limits.

[MarkF]

Thanks Bill

[Dr. Jet]

[MarkF]

I don't know if you guys remember Radek, but he built a small cat like this maybe 7 or 8 years ago. We started off with in runners in the 3000 range and used 2 and 3s lipos. Then some started using out runners and this became popular because it could spin a bigger prop. Then the problems of torque roll started happening. We found with a narrow cat it would roll on it's side if you went to like a 632 or 435 prop. I don't remember what kv was being used so that's why I asked what was going on now. I will see how my set up runs with a 427 prop and if it looks like it can take more, I will get the bigger motor. I got the boat for free so don't mind messing with some different set ups. Curious what speeds some of you are getting with this hull. I know we had a hell of a time trying to get one on radar. Are there some small gps units that will fit this size boat?

[Dr. Jet]

I don't know if you guys remember Radek, but he built a small cat like this maybe 7 or 8 years ago. We started off with in runners in the 3000 range and used 2 and 3s lipos. Then some started using out runners and this became popular because it could spin a bigger prop. Then the problems of torque roll started happening. We found with a narrow cat it would roll on it's side if you went to like a 632 or 435 prop. I don't remember what kv was being used so that's why I asked what was going on now. I will see how my set up runs with a 427 prop and if it looks like it can take more, I will get the bigger motor. I got the boat for free so don't mind messing with some different set ups. Curious what speeds some of you are getting with this hull. I know we had a hell of a time trying to get one on radar. Are there some small gps units that will fit this size boat?

You could always build one of these as a twin.....

[Alfa Spirit]

The best choice you can do :

https://www.scorpionsystem.com/catalog/helicopter/motors_4/hkii-22/HK-2221-6/

The cheap green motor is very small IMHO, look at GARTT : https://www.ebay.com/itm/GARTT-3700K...UAAOSw~PJbcq9u

[MarkF]

Yes I have since cancelled my order and got a suppo 2223 4400 kv motor instead.

[MarkF]

Guys
what is the motor bolt spacing? I need to get a motor mount, can you guys recommend one?

[MarkF]

I can make a motor mount but it wont have water cooling. Should I get one that does or am I going to be alright with 4 or 5 minutes of run time without one. I have an 82g outrunner, the size you guy's recommended.

[MarkF]

I finished converting mine over to brushless. Here is a couple of pics of the finished boat. Nothing to crazy and I wanted to thank those that helped with my questions. I haven't run it yet but hope to in the next week or so.

[fishslayeryo]

Great job Mark! Need to get back to mine. Let us know how she runs!

[johnnywall]

Looks great man! Love the minis, I'm addicted to running tight ovals with my mini rigger. Let us know how the Geico runs.

[MarkF]

I got it running and it runs decent. Finding the right prop is what I need now. It's fast with a 632 but torques the boat a little more than I like. My 427 cavitates to much so I will try some bending on the prop to get it to bite. The 4400 kv motor I'm using is probable better suited to a rigger so I may switch to a 3000 to 3500 kv motor.