HPR 5009c bulletproof build

[Prodrvr]

Quick photo update...finished the water pickups today. Took forever to find 4mm pipe, eventually found some at a hydraulics machine shop.

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What tool did you use to shape the glass? Looks very clean.

[Bradb74]

What tool did you use to shape the glass? Looks very clean.

I used a Dermal

20180822_171030.jpg

[Prodrvr]

I used a Dermal

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Oh I see...used a ball end cutter. Cool, thank you! I'll have to practice on some scrap fiberglass.

[Bradb74]

You're welcome, I practiced on on some scrap wood.
Just make sure you have a firm grip on it. In my practice runs it got away from me few times.

[Prodrvr]

You're welcome, I practiced on on some scrap wood.
Just make sure you have a firm grip on it. In my practice runs it got away from me few times.

Thanks again!

[Bradb74]

Hi all

Its been a while. My flex shafts finally arrived aftre a lengthy delay at our post office....
Does any one know what a good C.O.G. starting point would be on my boat?

Thanks.

[srislash]

I’m still playing with mine but 30% is a good point to start. I have it written down and I’ll get the measurements for you in a few hours when I’m alive, lol

[Bradb74]

Thanks

Got the first flex shaft installed

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[srislash]

Great Brad, you are sooo close. Do you have clear water where you are?

[srislash]

Brad I have 13 3/4” of the wetted surface for CG written down. This is with a 17lb RTR weight.

[Bradb74]

Thanks, I do. There is a good size dam around an hours drive from where I live. There is also a small dam 2 minutes from my house so that's where my first run will be.

[Bradb74]

Hmmm, please bare in mine that this is my first boat so I have absolutely no idea what the wetted part is. Please will you put that into "boat building for dummy's" terms.

Thanks bud.

[srislash]

Hmmm, please bare in mine that this is my first boat so I have absolutely no idea what the wetted part is. Please will you put that into "boat building for dummy's" terms.

Thanks bud.

Sorry I did not get back earlier Brad. So measure the 13 3/4” from the trailing edge of the sponson. Where the stinger mounts underneath.

I was going to mention that make sure you have room to run this one. It’s crap till it’s up on plane and then it is GO

[Bradb74]

Thank Shawn, much appreciated.

[fweasel]

COG, depends on speed goals. If this is a triple digit speed boat, you could be as high as 40%. Lipo sleds will usually provide quite a bit of balance point adjustment with heavy batteries.