The top and bottom rudders are connected and turn together. Those vertical surfaces on the horizontal planes are flank arrays on the real sub, and are fixed and inhibit turning rate as a side effect.
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That's a very nice BB Mankster! I made my top rudder fixed like Steve's and will see how it goes. If it's too drunk to steer, I'll cut it off and articulate it later.
JasonComment
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Sea Trials at Last!!!
I finally got my battery delivered and wired up to run the BB.
If I push her under initially, she gets all the air out and will then trim quite level. If I just put her in and dump the air, she sinks stern down and the tip of the bow stays dry. The air vents in the bow aren't big enough. This is why we do trial runs aye? If everything was perfect first up, we'd get bored. :roll:
The micro servos that I used, were ones that came with a radio from Hitec and aren't gutsy enough to drive the planes and rudder. It will move them slowly on the bench, but not at all under any load. I'll have to lash out for some high torque ones. I've got the linkages working as freely as I can and I think they're OK. I set the rudder at half starboard for the test and vid so she'd go around in a big ark. It worked OK. The people watching didn't notice that I wasn't steering it! I tried hard to find a spot with no hecklers, but they showed up. Always the way with subs aye?
Here’s a 5 minute video clip and slide show on the testing.
http://www.magpieyachts.com/files/BBseatrial16sept0CLake.wmv
JasonComment
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That looks superb Magpie. I'm glad the trials was so successfull and you are happy with her.
Thanks for the pictures, you do seem to have a decent stretch of water way there for your boating pleasure.
By the way you only get hecklers with subs because they don't understand!!
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jason, she looks real good m8
Adz..Comment
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Thanks guys!!!
Much appreciate the feedback!
JasonComment
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The BB performed well at the lake after the trimming work. Here's a video link of it. She's really finished this time. Really!
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Lovely handling boat, thanks for the update. I'm sure you will get a great deal of pleasure from sailing her.Comment
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Thanks Richard!!!!Comment
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Sorry to inflict the board with more on my BB but here goes:
I took the Blueback out today after fitting a new rudder that I made for it and a general re-tune of it’s gear, and it went beautifully. I ran it close to flat-out for 45 minutes and tested the Lipo. It still had 7.4 volts and I can run it down to 6v before the low voltage switch cuts out the ESC. I’ve had an hour out of it before too. I’m very happy with the setup that I put in this one. The Lipo, Subtech belt drive and Mtronics ESC are a good combination and it has a standard servo on the rudder too, which is a big improvement on the micro I put in her initially which stripped a gear on the first run!
She’s a good little boat. Here’s a video of 6 minutes of her at it.
Jason
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