Stingray Build

[RCnut]

I need to find a higher wind motor with more torque, that should sort it. Yes the Ratemaster will have no effect on the speed however im pretty sure it will affect directional control at a high speed.

[greenman407]

I would think that it will cause it to spin in the opposite direction as the ratemaster....................I think.

[RCnut]

I would think that it will cause it to spin in the opposite direction as the ratemaster....................I think.

What I mean is that I need a motor that will do less RPM but with more strength so it spins more positively at a slower speed or a higher ratio Gearbox. The Ratemaster is in effect acting as a paddle steamer ie pulling it over whatever way the thing is spinning.

[He Who Shall Not Be Named]

Just watched his mix-master .... er ... I mean RateMaster video. Wow!

Mark: I think what Mamas means is that the RateMaster, in surface trim, will work as a traditional paddle-wheel, thrusting in a lateral direction, yawing the boat like a thruster. Underwater the rotation should not contribute too much lateral (yawing) force -- other than a mild 'walking propeller' effect. But, the RateMaster will be turning at a much slower RPM than this. So, me thinks that other than the spectacle of it all, it will have little if any ship control result.

As Mamas has arranged the auxiliary drive shaft (for the RateMaster), I see no problem designing a motor bulkhead to accommodate both that output shaft and the PJ shaft. I see a smaller brushed motor working through a stacked planetary gear doing the work through an ESC Y-connected to the main ESC.

And I also watched the first in-water run of the SKY-DIVER hull. That thing scoots already, Mamas. It indeed will step up if you crank in the rated voltage. Wow! Fair off that blunt bow with a SKY and you're off to the races!

David

[Subculture]

Regarding the rollers. How about some brass rollers perhaps with a light knurl on them, sleeved with silicone tubing. The knurl will allow the the tubing to grip the rollers, but you can peel off the tubing easily if you need to replace it due to wear and tear. Silicone tubing is made to very tight tolerance, so the rollers should run straight and true.

[RCnut]

Regarding the rollers. How about some brass rollers perhaps with a light knurl on them, sleeved with silicone tubing. The knurl will allow the the tubing to grip the rollers, but you can peel off the tubing easily if you need to replace it due to wear and tear. Silicone tubing is made to very tight tolerance, so the rollers should run straight and true.

Yep, Thats the way to go, The nice thing is that with the modular backplate, all sorts of methods can be tested and designed to fit. Now, where did I put that tubing:biggrin:

[RCnut]

In this day and age of a throw away society im so pleased to show you recycling at its most imaginative, lol. This was brought to you By Mrs RCnut.

[greenman407]

AH! Perfect candle holders. Good for the Gulf states during Hurricane season.

[He Who Shall Not Be Named]

SACRILEGE!!!!!!!!!!!!!!!!!


(over my shoulder, Ellie looking at the monitor, nodding in agreement .... women!)

David

[RCnut]

Lol, There the old ones before the nice machined one was made, I was just gona bin them anyway.

[Subculture]

Regarding the spinning ratemaster, I thought originally you only wanted about 60-70RPM? The video looks a lot faster.

[He Who Shall Not Be Named]

Regarding the spinning ratemaster, I thought originally you only wanted about 60-70RPM? The video looks a lot faster.

I'm with Andy on that. If you keep the current spin rate then we won't need a PJ if you put a little pitch in those strakes.

David

[RCnut]

Yep the gearbox used in that vid is a 4-1 so its way to fast, However today I attached a freed up servo and the spin rate is much slower and even better, Vid to be posted soon.

[He Who Shall Not Be Named]

Just got my STINGRAY kit from Berni, all in good shape. Film at Eleven!

[RCnut]

Just got my STINGRAY kit from Berni, all in good shape. Film at Eleven!

Glad to hear that, Er What does film at eleven mean?