Can I do this?

[viper1]

I've started building, or better converting my 1st Tunnel hull with brushless outboard.

Regarding the outboard unit and mounting bracket, I was wondering if I could apply the following technique for angle adjustment: keep only the top swivel point, and make a adjustable stop on the bottom against the transom with a sort-of setscrew adjustment to set the angle.
In other words, the unit could swing back freely, but fwd it would 'hit' against a point on transom that is adjustable forward or backwards.

Now thinking ahead;
I could imagine it needs some friction on the top swivel point to prevent the unit from swinging back (due to drag) every time you lift the throttle on high speed, and then in turn slam fwd again when opening the throttle. In other words I want to prevent the transom getting 'booted in the bum' during turns.

Thinking about this because
1) It would prevent damage to drive if you hit something
2) The pond where I usually play dries out in summer, and it's very shallow quite far from shore. Ok to toss it in, but retrieval is tricky to say the least.

Something like that do-able? any experiences?

Thanks in advance

[viper1]

Nobody ?

[viper1]

bump (desperate!)

[Doby]

Sounds do-able as long as you stay on the throttle.....

[Doby]

Sounds do-able as long as you stay on the throttle.....

Potential problem though....if you flip the boat or do some sort of 3D boating (and eventually you will) the outboard could swing a lot on the top swivel and the force of a sudden stop could do substantial damage to the transom/outboard etc...

[viper1]

Hmm.. true. That crashing thing I do all the time...

How about indirectly to a servo? And with indirectly I mean either use a lock mechanism, or a sub-arm so it's isolated from servo & gear.
Then it would only be usefull for lifting it ('2' in O.P.) but not for damage control.

Gets too complicated quickly isn't it, sorry just thinking out loud.

[Doby]

Great idea, but the real estate required for an extra servo is pretty sparse in Tunnel hulls.

PS: Nothing wrong with thinking out loud.

[Peter A]

Hi, how about some sort of spring loaded system to help hold the unit down, or a shearbolt arrangement that would give if you hit an underwater obstruction.

[viper1]

The shearbolt is a good idea, I would do that anyway even in the standard adjustable outfit.
Re Spring, I think Doby is right, if there is one thing I learned from my Genesis tumbles is that you can not make it solid or strong enough if she goes over at 120km....
Not that this one will go that fast. But still. I lost my GoPro cam that way, even though it was extra secured with a safety line. Came off like nothing was holding it.