project 2013: #124 - the very last HPR 233

[jj2003]

The R/C Engineer! Fantastic stuff Man.....Fantastic stuff! You have an imagination second to none!

[bruiser77]

Wow, that is very innovative! Very nice work! Looking forward to seeing more

[ManuelW]

And the lighweight turbine mounts are almost done. In post #46 you could see the CAD design. In the meantime I received the CF angle brackets and the 3.3mm CF sheet for the base plates (3.3mm is 1/8"). According to my design I cut out the base plates using a CNC machine. But as this uses a vacuum fix system it is impossible to machine the angle brackets there.





Therefore I used the CNC machined baseplates and did the necessary work on the angle brackets in the old style by hands with some drill bits and grinding/sanding. Definitely takes more time but you couldnt distinguish the result from a CNC machined part. And here is the mount system almost done. I did even use some rounded head M3 SS screws to save some weight there. And I think the result so far is not bad. Compared to 514.7g for the regular aluminium mount system that comes stock with the turbines I managed to keep the weight of my CF system below the aim of 175g per piece. In fact each has 167.6g which means its 68% lighter. Or in other words I do already save a decent 1.5 pounds just on those mounts.





As you can see the front bearing supports are not mounted yet, those are already CNC machined but currently at a shop for having them anodized black. Will keep you updated about the mounts as soon as they arrive and I can finally assemble those parts. Next things I'm waiting for are the drives, rudder & hydraulics. Will arrive next week or earlier, so far not anodized but I need those to do some work on them before I can forward them for anodizing.

regards,
Manuel

[kingwrench]

Awesome job as usual

[grsboats]

Hi Manuel

I've been following your masterpiece job that is an inpiration for most of us.Thanks for sharing.
Gill

[ManuelW]

RC Box

Another little sub-project is the RC box. So far there are a few really nice existing rc boxes around but sometimes their design doesn't look what I'd like or they are too heavy. With my aims an rc box with an empty weight of 3-4 pounds is not acceptable. So I took some dimensions inside the boat and as hopefully you don't get bored, made a CAD drawing of it as well as a technical sketch.





This was something I'd have really loved to do myself but sadly I'm missing almost all necessary materials for that. But Thomas, a friend of mine, works currently as a carpenter and I asked him if he can do it for me. And he came up with a really nice result. And that mold is NOT CNC machined, its 3 layers of 1" MDF (middle density fiberboard) laminated together and then machined in shape. As you can see all side walls are 3° conical as its intented to make a negative mold of that part and that way it will be easy to get it out of the mold.



Currently that mold is painted by a professional airbrusher (for sure just single color + clear coat) to be able to make a negative mold and be able to laminate the final RC box hopefully in glossy carbon fibre optic. This should give it a decent look, strength & stiffness without much weight. The bottom will be a solid 2mm CFK sheet and all parts will be mounted on that baseplate, the laminated RC box will be glued to the bottom with a nice fibre reinforced seem. Will keep you updated!

regards,
Manuel

[RandyatBBY]

Sweet, great job thanks for sharing. I really enjoy watching the build.

[Chrisg81983]

Very nice wood working skills

[ManuelW]

Hello Guys,

yes Thomas did an awesome job on the wooden positiv for the RC box.

At the week-end I got some parts back which I was waiting for from having those black anodized. So I could finally assemble the turbines with their mount system. Not much to explain, I just made a comparison on a scale and overall weight is 2800g compared to 3190g from the stock system which makes a 390g saving per turbine. But now the stuffing tube support is already included which probably saves another 60g so total saving for that around 900g or almost 4 pounds.

Here the CAD design:


And the final parts:

[ManuelW]

It now uses a regular collet coupler with new support bearing. Included in the stuffing tube support is a non-metic bearing with 1/4" ID to support the flex shaft and remove any vibration from the coupler. The screw on top of this part closes the bore to add grease/oil for lubrication. I think it looks pretty decent.

regards,
Manuel

[ManuelW]

Hello,

seems as I behaved well the last time as I got a nice present for easter, just had no time to present it till now. I finally got the hardware parts for my boat which I've been awaiting quite some time. I think the pictures should be pretty self-explaining, not much to add there.

[ManuelW]

Thing is from that photos you are missing almost any perspective or comparison in size to known objects. So lets try that:






(here you can see every part was put on a strict diet)

And here some pictures where the fun starts.







To give an absolute idea, that drive is a HPR 135 drive, which means its already intended to fit on a 54" offshore catamaran.

Hope you like and enjoy,
Manuel

[Jason4636]

That is some sweet looking hardware!!!!! Plus it's beefy as hell.

[graill]

The Easter bunny must be rich! looks great Manuel.

[Chrisg81983]

Awesome hardware man it makes that 135 drive look like micro hardware.