Active tunnel wing for cat

[bonewar]

Crabstick, Mate that makes perfect sense about the drag issues using the tabs. Thankyou. Jesse , My end goal , Have a look back a few posts ,I explained what I'm trying to achieve there, Also i think you and crab are right about the tabs. Mark thats another good idea , do you know of anyone trying this . Thanks for your input guys Bonewar

[Rex R]

a couple of us in my club have been kicking this idea around some. my thought is to use a pitot tube and adjust the flap in response to changes in air speed.

[bonewar]

a couple of us in my club have been kicking this idea around some. my thought is to use a pitot tube and adjust the flap in response to changes in air speed.

Sorry mate you lost me?

[Eyekandyboats]

most real world applications of tunnel tabs are not active and are not consantly variable at all.
they are set for the water conditions and the balast the boats cary to stay in class to compress better.
all you will be doing it making the stern lift and drop, also probably a couple seconds later then it should have been.

[crabstick]

yes, but these cats wont have adjustable ballast anyway, thats a whole other thread

I think a tunnel tab will have a much more dramatic effect on a scaleboat..
just look what the fixed tunnel tab does to the TS Jolly cat

[Eodman]

If you are sport running, you might be able to sort an adjustable tab out, but at the length of time that heat races are I'm not sure it would be useful! Just don't think you're running long enough!

[bonewar]

Tunnel flap

OK this is where I'm at . I am going to make it out of carbon fiber sheet , Also I'm trying to make it plug&play so that if it doesn't work i can adjust it so that it is level with the tunnel . I think it will work , just not sure how well. BONEWAR

[bonewar]

Still thinking out loud. Has anybody tryed a hydrofoil in the tunnel of a cat??

[Jesse J]

Still thinking out loud. Has anybody tryed a hydrofoil in the tunnel of a cat??

What's this ? hydrofoil, meaning under water?? got any pics or sketches of what this would look like?
thanks
J

[bonewar]

hybrid hydrofoil cats

Jesse , This is 1 pic i got off the net to show you what I'm talking about. Do a search on hybrid hydrofoil catamarans , Theres lots out there. Bonewar

[bonewar]

Tunnel wing

OK,

Hear it is, the prototype , Tunnel wing . I have extended the tunnel on the cat to allow me to put the wing towards the back transom( just like the real Maritimo's of old). The wing will only go down as far as the tunnel extension. I will not use this wing until i have the Cat up and running fast . Then i will add the gyro to the system and the fun will begin. Bonewar

[Xcesive8]

Hmm..

Nice work Bonewar.
The wing in my cats tunnel is solid fixed, and manually adjustable, i think this idea you have brought to life is awesome.
Look forward to your results..

Ryan

[bonewar]

Tunnel wing

A couple more pics of the control arm .

[Cat-Boi]

being a helicopter nut first, there are some very fast gyros and servos, I was going to do this on my 1/6 scale unlimited to control the lift of the wing.

its a great idea! but only testing will tell...(these servos are for fitment only)

[Darin Jordan]

This is a cool thread... looking forward to seeing more updates...