Need more speed!!!

[Adrianli]

I would like to get more speed out of my current setup of my 47" Flying Dragon Mono boat. My setup as follows:


Motor : Neu 2215 2Y
ESC : Huaya 200A HV
Batts : 10s2p 10,000mah 40C
Prop : Octura X455 and X457
Total weight : 9kg

Max speed by Garmin Forerunner 101 was 53mph.

Max amp draw by Eagletree was 160A.



Will getting a Octura X452/3 or X455/3 increase my speed?

[Fluid]

You do not have enough prop to load the motor. Three blades aren't needed, if you want speed increase the pitch. Try an x462 or x465, just watch for heat buildup.




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[Adrianli]

You do not have enough prop to load the motor. Three blades aren't needed, if you want speed increase the pitch. Try an x462 or x465, just watch for heat buildup.

Using the FE Calc, the amp draw went up but the speed remains.

[Fruity]

FE Calc is theory only - Fluid's advice is based on experience......

A big differnce in my opinion.

[bwells]

Wouldn't a x6 series be an increase in pitch whereas a x462 or x465 be an increase in diameter?

[6S HYDRO]

Fe calc has no input as if it is a 15" mono or a 45" mono- that makes a huge difference

[Fluid]

Wouldn't a x6 series be an increase in pitch whereas a x462 or x465 be an increase in diameter?

An x648 has 14% more pitch and the same diameter as an x448. An x465 has 35% more diameter and 35% more pitch than an x448 does. You need to increase the pitch to increase speed, and increase diameter to increase prop efficiency - up to a limit. Unfortunately we don't have an infinite variety of prop to use so we often have to increase diameter along with pitch.

Pitch is what gives you speed. Regardless of prop diameter, you can't get more speed than your prop's pitch allows. You need a minimum diameter to push a certain sized boat efficiently. Too little diameter and the prop slips too much, too much diameter and the motor bogs down and amp draw soars. The perfect balance maximizes performance - this may require prop modifications to reach.




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[FloatDaBoat]

The perfect balance maximizes performance - this may require prop modifications to reach.

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I couldn't agree more. Unfortunately, many of us don't have deep enough pockets to purchase the large numbers of props required to be able to experiment with altering pitch, diameter, blade shape, etc.

Until I hit the Lotto . . . .

[Fluid]

If there are other boaters in the area, the solution is simple. Have different members buy different props so all the possibilities are covered. Then swap props around until you find what works. I've done this in the past and it works without having to spend the rent money. If you are serious about your boat, there's always a way......




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[FloatDaBoat]

If you are serious about your boat, there's always a way......

.

I'm VERY SERIOUS; my wife doesn't seem to share my passion . . . .

[Adrianli]

Hi,

I have the Prather B255 prop. It is slightly smaller in diameter compared to the X462 but it has more pitch.

Prather B255
Dia : 2.4 inches
Pitch : 3.8 inches


Octura X462
Dia : 2.44 inches
Pitch : 3.416 inches


FE Calc says it'll give me more speed but my 200A esc will blow up.

[Make-a-Wake]

OSE sells an X560............hone it down a bit if needed.......just a thought

Diameter: 2.36"
Total Pitch: 1.5x2.36=3.540"
Shaft Size: 3/16"

[MarkF]

I use to run that motor in my mono on 12s 2p. I could run up to a 465 prop. I like the 460 3 blade the best though. On 10s 2p I would run a 465 prop and just make sure you have the motor water cooled. The 560 prop or prather props are not a bad choice but you have to delift them to make them work good in a mono. If I could only afford 1 prop I would go with the Octura 465. I dont think you can do much better than that.

Mark

[AlanN]

A prop is a prop is a prop until you change it. Cupping and detounging a prop can make a world of difference. Most motors like a specific diameter. Basically a sweet spot for what the motor wants to turn (dia and pitch). Find a diameter the motor likes especially for the voltage you are running. Then start making changes to the prop. You may be pleasantly surprised. Mark F is running a 12S setup and will change the motor characteristics compared to your 10S setup. You may want to jack your strut up for the larger daimeter props. If you don't you may load up the motor too much. Another option is to try some ABC props.

[AlanN]

BTW I always had better acceleration and speed with 3 bladers on my 3060/8 on 10S in my mono. I would try cupping up and detounging a 455 or 457 before going to any more major expense.