i dont know a ton about riggers but i bet it will mss with the setup .. but ask chris wood i bet he will tell you to scrap it.. idk david, just my 2 pennies..Just pulled a new tub out of the building jig and it has a small cork screw in it. It is out by about a 1/16" over the total length should I scrap it or can I shim the sponson tubes to make the boat square.
Just pulled a new tub out of the building jig and it has a small cork screw in it. It is out by about a 1/16" over the total length should I scrap it or can I shim the sponson tubes to make the boat square.
I agree with Marty. Just get the angles right, and shim it properly and it will be fine. Most tubs end up twisted after years of running anyway.Just pulled a new tub out of the building jig and it has a small cork screw in it. It is out by about a 1/16" over the total length should I scrap it or can I shim the sponson tubes to make the boat square.
David,
Some of your calculations are not going to pan out once you put the boat
in the water. There are very few electric boats pulling 60K on the propeller.
If they did, they would be very close to 200 MPH. I just got back from a time
trial and we didn't see anything like that. We did see an electric boat in the high
90's though. If that propeller is in S.S. you will be all right, if it is aluminum it will
bend the blades.
Good Luck Testing,
Mark Sholund
Thats why I said on paper thy are very high numbers. Not that high.
2770KV
7 cell 10000 mah 20c 25c burst
80 percent motor ef
15 percent prop slip
57394RPM loaded
140MPH
50x77 prop
the 6 cell looks more realistic
49195RPM
120MPH
If I can push this hoping for at least 100MPH. The weight of the boat will be about 4.6lbs.
The motor is a 6XL rated at 6s 110amp 2000wat constant load and 50000RPM. the ESC is rated at 200amp 7s.The pacs are 2&3s 10000mah 20c 25c burst.David, I'm guessing your thinking 8XL motor. Do NOT pump 10s into that motor. You'll be torching parts. Even 6s will likely be too much for an 8XL.
There are very few FE guys that have crested the 100mph mark. At least in the states. Maybe a dozen total. To get there requires more than raw power and rpm.
I noticed your in Florida. If your serious about going crazy fast look up Chris Harris. He's one of the fastest FE guys in the US.
I was thinking the same thing not if thy broke off just trying to get it on plane from a standing start. I have a pool too test it in. It will be water tight threw the whole tub. It will have each bulkhead sealed to its self. If you notice there are 4 bulkheads for that reason. But it still may not float. I will let you know after I throw it in the pool.I just have one question...... If one or both of the sponsons break off, whats gunna happen? :unsure:
May want to do a test in the bath tub just in case....
Larry Jr.
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