Home made balsa catamaran

[lomdel]

Are you going to run the twin drives on the tunnel floor as in the pics or are you going to install them in the sponsons? I'll be watching this build...

[rawsonreyes]

hi oldman, what type of drives are those and where did you get them. the cat looks great post some pics.rawsonreyes

[OldMann]

elastic coupling and engine cooling ... made... home made

[OldMann]

transmission totally

[ace028]

Awesome work man, I can't wait to see more pics and vids.

[OldMann]

I reinforced fiberglass hull, I sanded it and we prepared it for painting. Some samples with rudder and engine-shaft coupling port propeller

[OldMann]

...

[crabstick]

the angle from the shaft to the motor looks a little extreme and could be robbing you of a little power via the drag its probably creating, but man nice cat!

[OldMann]

Coupling between the engine and port-propeller axis is made flexible shaft spins in a teflon sheath. Sheath is in the brass pipe is shown in the picture, that you can lead to error. Guarantee that is how can the system functional.

[Eodman]

Two questions - and no I'm not being a smart a** !

1.) Why did you round the rear corners of the cat as you did! This is the second cat that I have seen like this. Is there a performance advantage? The first one was a manufactured hull.

2.) Why mount the outdrives so far inboard towards the tunnel --- if you centered them would there be angle on the motor?

[OldMann]

I did not understand the second question. Rounding corners has nothing to do with performance, maybe the design.

[OldMann]

Two questions - and no I'm not being a smart a** !

2.) Why mount the outdrives so far inboard towards the tunnel --- if you centered them would there be angle on the motor?

If you have a hull made of the factory after all standards can go down the assembly in May in the middle boat in the water, so in my case when it made... home made,
not get what you get factory, trying to mount the axles as close to the inner walls of the second crest to raise it up more water. The idea is to slip on a surface as small.

[Rull]

Hi OldMann!

Could you tell me what current flow through one motor in your setup?
I building cat and planing to use double drive Octura X442, so looking suitable motors. I think yours motors like feigao 540L. Are they too hot?
Thank you!

Serge

[G Doggett]

Eodman - I think what OldMann is saying is the drives should be as close to the inner edges of the sponsons as possible. Thats what I was told when setting up my twin cat.
Serge - My twin Jolly uses X442 ( r/h and l/h) props and I use 2 Ammo 2300 motors which draw about 50 -60 amps each on 4S lipos. Top speed is 90 kph. Hope this helps you.
Graham.

[OldMann]

Hi OldMann!

Could you tell me what current flow through one motor in your setup?
I building cat and planing to use double drive Octura X442, so looking suitable motors. I think yours motors like feigao 540L. Are they too hot?
Thank you!

Serge

I using two engines Roxxy 3656. These engines were 2550 kV, the power supply to 20V and consumes 70A, perhaps more.
carbon propeller diameter is 42 and step 56.