Later-Model Dumas Scarab 38KV > AVS Build

[Jesse J]

Well? Did she float?

[Mike W]

She ripped herself apart. My fault trusting Loctite should have used epoxy. Will rebond the drive assemblies.

[Mike W]

OK it's been 3 weeks without a club meet but the repair was simple. First successful maiden video for your entertainment below. Apparently outward-rotating props are not the ticket. I default to outward always because it makes more sense in my head, but the result seemed to be the opposite of what I expected?? When one prop cavitated with turn input the hull literally torque rolled almost out of the water! Funny to watch enjoy!

The second run was much better after some trim changes and inward-rotating props. It did 67 on GPS but was getting hairy. The myth that some hulls simply will not perform beyond a certain level may in fact be true, but I'm stubborn enough to have to learn most things the hard way. Unfortunately I did not get video of the second run. Next time!

https://www.youtube.com/watch?v=F7HOUjz4s1s

[fweasel]

Ha, nice save on the front straight. That thing looked like a handful with the outward spinning props.

[bogieboy]

very nice looking boat! and yeah, looks to be a bit sketchy yet....LOL

[Mike W]

Much better attitude now with drives up and more rear CG. Maybe need to go back a little? More power than driver guts too. But a nasty hook despite careful turns. Any tips?

https://youtu.be/_3nH66Y5MNY

[bogieboy]

getting closer. i cant remember, are you running any turn fins? if not, i would start there...

[Mike W]

I am. Will lower them. I know this rear blowout is a characteristic of stepped hulls. I was also told that props outward is most common with twin vees? Will try that again too.

[srislash]

Much better attitude now with drives up and more rear CG. Maybe need to go back a little? More power than driver guts too. But a nasty hook despite careful turns. Any tips?

https://youtu.be/_3nH66Y5MNY

Any updates Mike? This is steerable drives right? I have been playing with them for a bit now and did get some fixes.

[Mike W]

No I really wanted to try steerable but did not. I’m focusing on my 1.2M cat at the moment will message you.

[stac1627]

Nice works Mike!