Hi GRA,
Your build looks awesome!
Which plans are you building from?
As I'm terrible with empiric scales, how long is your hull (in inches, or cm)?
I'm working on a 110 cm version and I'm currently a bit stuck on how to realize a large enough hatch without compromising the looks...
http://www.modelboatmayhem.co.uk/forum/index.php/topic,34033.msg336713.html#msg336713I've got the bare hull running, check out the video in my build thread.(Turn up the sound really high.)
As you can see I've gone the same route regarding the steering, and it works a treat, as long as the tiller arm on the rudder and the arm on the servo are the same length.
You'll need this amount of rudderthrow.
The way you have it in your pictures will result in slack in the lines, hopefully not too bad as it'll make steering at speed quite hazardous...
I've changed from two props to one bigger prop, one reason being the higher efficiency (which isn't really an item with the brushless power available), the other is the hull design.
I've build a smaller prototype and discovered the steps work really well, drawing air under the hull, the point where this happens causes a jolt in the speed; without more throttle the boat accelerates due to the lower drag.
Downside to this phenomenon is the fact the air/water mixture affects the prop and rudder efficiency; as you can read in my thread, small props loose grip above a certain speed and the revs go up, while the speed goes down, until the steps have lost their function and the hull runs fully in the water again.
The prototype rudder was to scale and when I increased the propsize to keep part of the blades in undisturbed water, the speed increased too and the steps drew massive amounts of air under the hull, rendering the small rudderblade useless and the boat uncontrollable until speed was reduced.
The larger 110 cm boat got an enlarged rudderblade and the prop was positioned further forward to eliminate as much 'foaming' as possible, also, as the prop is in line with the rudder, the distance between prop and rudder made the steering less aggressive.
I fear your props (the brass props look good but are not suited) will prove to be too small to keep the boat on the plane; as soon as the steps do their job, the props will stand in the air water mixture...
Regards, Jan.