Twin 1717 Rio 51

[Brushless55]

40mph might be a little embelished but would be real close...

that would be impressive!
I would love to find someone who can build a gear box for my last 1717 that would give me a shaft rpm of 23-24k
that way I could use like a gasser prop with the sigle 1717 and maybe see mid 40's to upper 40's on 6s

[JMSCARD]

that would be impressive!
I would love to find someone who can build a gear box for my last 1717 that would give me a shaft rpm of 23-24k
that way I could use like a gasser prop with the sigle 1717 and maybe see mid 40's to upper 40's on 6s

try a fdm turbo trans.. they used to handle some big motors..... would be worth a try for kicks :)

[Brushless55]

try a fdm turbo trans.. they used to handle some big motors..... would be worth a try for kicks :)

[forescott]

If it were me I'd use the t-180's and run 5s instead of 6s. A little less battery weight and less stress on the esc's, but still blisteringly fast!!

[forescott]

5s put's you closer to 30,000 unloaded rpm and 447's will get you close to 50mph reliably.

[Brushless55]

5s put's you closer to 30,000 unloaded rpm and 447's will get you close to 50mph reliably.

Heck even bigger props for these monster motors
they can take it

[forescott]

I think it would work but it's gonna be a lot faster than 40mph......My guess would be 60-70mph. Props come in a "r" which is a right hand or also called reverse. Octura makes 447's in counter-rotating and the next size up is 457's. I would start with the 447's and go from there......

Actually you can get reverse rotation x-450 3-blades!

[Brushless01]

So I shouldnt run 6s ??

[Brushless01]

Also what props would work the best ?

[blackcat26]

Actually you can get reverse rotation x-450 3-blades!

You are right but if you have ever seen the "r" in those, they are nasty. A real pain to clean up and sharpen.

[Doby]

Keep in mind that the Rio is a boat designed for the low 40's. When pushing even the low to mid 50's it handels like a SV-27. tippy and likes to barrel roll in corners in some small chop.
THe hull has a fairly shallow V compared to some of the DF type boats and can provide a lot of lift at speed. Keep a fair bit of weight forward to help the boat stay on the water and corner better.

[Brushless01]

Thanks Doby was hoping you would chime in. I am thinking to run 6s2p lipo on two x447 props is this a good idead ? Or should I step down to 5s and run x450/3 props ??

Thanks

[RIPFENCE]

Keep in mind that the Rio is a boat designed for the low 40's. When pushing even the low to mid 50's it handels like a SV-27. tippy and likes to barrel roll in corners in some small chop.
THe hull has a fairly shallow V compared to some of the DF type boats and can provide a lot of lift at speed. Keep a fair bit of weight forward to help the boat stay on the water and corner better.

THIS IS WHAT I WAS TRYING TO REMEMBER EARLIER IN THE THREAD I WAS UNSURE ABOUT HANDLING OVER 50!!???

[Brushless01]

Just received the motors, there huge !!