battleship and aircraft

[lewisantweight]

we and my friend are going to make a .1.45 metre long aircraft carrier. we are going to use a gimson for forwards and backwards with an electronize esc. mfa motor (possibly) with chains and sprockets turning the rudder for left and right with a botbitz esc and whatever battery. if you have anything to add please do and does anyone have any idea how i could make planes to go on it.

EDIT: i know this comes under models and not robots but this is the nicest and best community for good reliable expertise and information.

[Eventorizon]

Re: battleship and aircraft

A gimson is probably a bit to slow to provide enough propulsion. Speed 900 are designed for model boats and have much more power, but then again they cost more. Just a thought.

But a 919D for steering seems a good move, lots of torque to be had there

[Ellis]

Re: battleship and aircraft

Unless the propeller is massive (size of a football), you'll need something higher than the roughly 500rpm of a gimson. As Alex said I'd expect something along the power-lines of a speed 900 for a nearly 2m boat.

Not that I have ever built anything on this scale.

[jonny]

Re: battleship and aircraft

i think using a brushless setup and a large servo would work best and be far easier, maybe make the boat a bit smaller?

edit: easiest way to make planes for it would be to get some airfix models or similar and use them.

[robotwars]

Re: battleship and aircraft

I've got a missive height torque servo ideal for your rudder.

RRP £384 http://www.active-robots.com/power-servo-050.html

Open to an offer.

[maddox10]

Re: battleship and aircraft

I suggest you look at the Big Gun ships.

1-144 scale. Certain rules for propulsion and hull vurnability.

I had once the idea to start with it. Unfortunatly, the ball bearing firing weapons on those ships fall under the Belgium weaponlaws, and can't be used legaly.

In that case. A small WW II carrier (called a CVE) of the casablanca class was 156.13 meter long.
In the Big Gun scale that means 1.08m long.
Topspeed of that slow carrier was 35km/h 19kts. Scaled down its 4m/min 250m/h.

Even the fastest carriers of WO II, the Lexingtons, length 270.7m speed 61.5 km/h, would give you a ship of 1.87m long, and a scaled speed of 7.5m/min 450m/h. (even faster than the modern nuclear carriers)

And those speeds can be gotten from even the feeblest of motors. Unfortunatly, even the least bit of wind will make that kind of propulsion unsuitable for any kind of water.

[PJ-27]

Re: battleship and aircraft

I knew a guy years back that made large scale model aircraft and boats.

For one boat, about 1.5m long he used a petrol strimmer to power it. Prop on the end, already has a long drive shaft, servo on the throttle, central fugal clutch so idles without the need for a gearbox.
Just need to hope it doesn't stall!

[lewisantweight]

Re: battleship and aircraft

i will probably use speed 900s and the motors for the rudder (but will keep the servos in mind) and this build is mainly for my friend though the aircraft though the planes will be mine. still trying to fund a way to get them in the air. not building it for a few weeks so will keep everything i can find as an option. the budget is 700 quid so i doubt there is a chance of it being too expensive, fingers crossed.

[lewisantweight]

Re: battleship and aircraft

does anyone have a link to a good place i an get speed 900s as cant find one.

[lewisantweight]

Re: battleship and aircraft

heres a good question, has anyone thought of doing marine robot warfare? eg. bulding ships and fighting them in a body of water like a poolthats been hired for the event . And the same for aircrafts with mini pneumatics guns on the planes so you can have a dog fight over the local field as an event. the event would cost nothing.

[Bodge Job]

Re: battleship and aircraft

You couldn't use pre made pools as they could get damadged and that would be as expensive as hell. And to build a proper arena would cost quiet a bit. Couldn't really make a portable one though would be to heavy (even with out the water). I thought about it, but its pretty impractical tbh, would be pretty cool to watch though, but I think the guns would stop being used pretty quick due to the lack of power amphibious robots would be cool and maybe more interesting to watch, but still unfeasible.