HPR C5009 Build - Nor Cal

[ManuelW]

The new drive position looks way better. Its not possible to see on the picture but maybe you can make a more detailed one. The right drive definitely looks a little "wrong" but I'm pretty sure the mistake comes from somewhere else.
Can you take a detail picture, I already had a similar issue and the reason simply was that the rear part of the drive didn't touch the transom over the whole surface. So it was not really reactangular to the transom, caused by the nut inside. So in your case is there a little gap on top of that drive part to the transom?

regards,
Manuel

[lavigna]

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Manuel - Thanks for looking at it. The drive is sitting dead straight up against the transom. Because the transom is so crooked, the small part of the drive is at quite an angle, compared to the long end of the drive which is about parallel to the hull. Will this angle cause binding of the flex in the drive? Should I try and get a correct hull from HPR?

Thanks!

[ManuelW]

Ah okay and its on both sides the same? Basically just the side where you posted pictures of in the last post looks fine. The transom of the HPR C5009 is not 90° to the running surface but that was already the intention when CAD designing the boat.
If mounting is fine, it should be the exact same thing on the other side. And also the binding of the flex is not an issue as on the picture you have the drive in the highest possible position and you'll have to lower it anyway.
Make sure you run the stuffing tube right to the transom and cut it off even. The teflon liner itself goes roughly 1" inside the drive till the front bearing.

I've built a few C5009's, these things are a little nasty when it comes to corners but on straights they are dead stable.

regards,
Manuel

[lavigna]

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Happy New Year all! Hope everyone had fun and all the best over this next year.

I am still waiting on some parts, so I have not been able to get much work done. However, I did finally mount the steering hydraulics. Everything seems lined up just right, and went smoothly enough. I need to order some M2 bolts/nuts for the permanent connection to the rudder. Sorry for the crap pictures in this thread, but my Nikon has been getting a new lens suitable for macro shots.

[Chrisg81983]

Looking good man

[nata2run]

Looking good Adam, did you sort out the drives??

[lavigna]

Thanks. Well, as for the drives, as Manuel states above, I must assume the angle of the hull transom, and therefore the forward section of the drives is ok. I have found some photos of other C5009 hulls and they seem to have an angle as well, although it does not seem as severe as mine. The transom on the right side of the boat is more severe than the left, but the difference is not huge. Still, I am not thrilled about this, and did not expect this from this hull, but I think it will be just fine in the end.

I am still waiting on some cf plates to arrive so I can cut out reinforcements for the upper mount of the drives, and finally be done with them, lol.

[lavigna]

Update on the build: I had been waiting on some material, so I had not got a lot done.

Drives: I got the drives fully installed. I noticed that HPR sent me (1) 16mm nut and (1) 17mm nut for my drives. They both had the same inner diameter and threads, but the 16mm obviously fit better because it had better clearance to the bottom of the hull. I could not find another 16mm nut in the same threads, so I ended up cutting down the 17mm nut to match. I also drilled my holes for my upper drive supports, and got them torqued down. Drives are complete!

Rudder: The rudder is already done, but I cut out a piece of cf in a circle and secured it inside the circle area of the rudder support. I figured this would help waterproof, and looked kinda cool.

Water Pickups: After much thought, I decided to go with the flush mount water pickups from Kintec Racing (awesome site and fast shipping). I think they will flow more water than using a piece of bent brass tube. I really took my time cutting out the hull for the pickups. I want it to be very clean, and it is so easy to mess up. I have also spent a lot of time hand honing out the inside of the water pickups with a dremel tool. I want them to flow maximum water, so I have bored out the inlet and insides to make everything as smooth as possible. I dont have pictures of them yet, but will post once I do.

Electronics: I need to send Manuel a note and have him put together and order me an electronics package that will fit my goals for this boat. I also want to order some items from Nata for the interior layout. P1010439.jpgP1010440.jpgP1010445.jpgP1010452.jpgP1010457.jpg

[Chrisg81983]

Looks real good man what r your plans for electronics ? Kent is a great at making cf parts and vinyl. I alo wanted to let you know that a single brass tube flows amazingly well if installed correctly. It actually works better than most of the prefabricated aluminum ones that I tried.

[twissted]

looking good!

[lavigna]

Chris - I hear you on the brass tubes flowing better than the stock flush mounts. However, I have spent a ridiculous amount of time boring out and smoothing the insides of my 2 flush mounts so they will flow maximum water. The scoop and radius they now have just inside them should provide a lot of water flow. I Have compared them to some brass tubing, and with the limited thickness of the hull, I dont think I could get the same flow with brass tubing. Of course, this is all to be determined, lol. Plus, I like the look of the fush mounts when they are installed cleanly. It looks more scale to me. Here is a pic of a stock vs. modified flush mount. This does not show the work inside, but gives an idea of the increase in opening.

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[Chrisg81983]

Wow there is a big difference between the inlet holes. What you did should make a big diffence in water flow. Did you also bore the brass barb/water nipple on the other end (inside) ? I got much bettetr water flow by drilling them out. Looks great and thanks

[lavigna]

Got my water pickups finished, nearly. From the bottom they do not look as clean as I had hoped, but I can fix that a little by filling in the small seams around the perimeter. The important part is that they sit flush, and when I run my finger over them I cant feel anything. I had just enough clearance inside between the pickup barb and tunnel wall, to attach my water lines later.

This must be the worlds slowest build, but I am having fun with it.

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[twissted]

Cooling.

I hope that your system doesn't need this amount of cooling to keep the esc and motor in check. If it fails your out a bunch of money. I like the brass tubes for max cooling but found that I was pushing the motors to hard even with good cooling. I learned alot also that some motors just run hot and are better as paper weights than being a boat motor. All said, you have a great boat and it's nice to look at.

[lavigna]

I dont plan on running a very 'hot' system. I want a reliable system that get me to the 80mph range max. I dont know much about electronics setup, and will likely have Manuel order me a system that he recommends. However, I want my cooling system to be as efficient as possible, just like everything else on my boat. Thanks Twissted!