HPR06 - Austrian Build

[ManuelW]

Wind Screen

If you want each HPR06 is delivered with a windscreen and window frame. As said Wolfgang likes Scale this was a "must-have". But as this might also be a weak point I used a broken and repaired hatch from my HPR06 for this. So basically he has two hatches, one for driving just with the air scoop and another one for presenting it with air scoop and window-glass.

First a picture of the set and the repaired hatch. For these I used M2 hew-screws with a flat head because they look the best.





After that I drilled 25 holes with a 2mm drill, the holes are already implied on the window frame as you can see in the picture above. After that I cut it out and fitted it to the hatch:

[ManuelW]

As it can be seen above I fixed it to the hatch and drilled the 25 holes also through the hatch. The blue line marks where I have to cut out the hatch itself. But before this I cut out the plexiglass windscreen with a small scissor. Quite tricky to get it right, especially in the narrow corners.





After that I cut out the windows from the hatch and screwed everything together. Doesn't it look nice?

[ManuelW]

Next step was to mount the 6S1P 4000mAh 40C Turnigy Lipos to the "sledges" of the lipo rail system. For this first I stick them to the sledge with some double sided tape and then I used shrinking tube. To fit to the rest of the boat I used black one:







The Setup

As the desired Tenshock 2250/7 are not available I had to change the motors. After some discussions with others I decided to go for two Leopard 4074/2Y engines with 2150kv. These should fit very well to the boat and allow speeds around 130km/h with Octura X447. As controllers I use two 180A Seaking ESC's, each with 3 additional caps directly soldered to the original circuit board. This gives 6000µF per controller, should be way enough. I also use the original Leopard water jackets, as some might see I turned on each one one of the nipples to get a shorter cooling circuit.

[ManuelW]

Then I connected everything up and cut the wires and soldered the connectors. As it can be seen I suited the parts in the hull and cut the wires to the minimum. As bullet connectors I use 6mm LMT system because I think it offers outstanding chucking power and little resistance. Here the wired up system outside the boat. I also marked the motors to know to which side each drive-train belongs. As you may see I want the props to spin "inside" and not outside.





Result

After that work the hull was ready for screwing all the components inside. The water outtakes are fitted to the inside of the tunnel, if you look carefully you'll see. As far as up to now I'm quite satiesfied because the cooling system as well as the rest of the wiring are kept as short and efficient as possible. As receiver/transmitter system I used a Futaba T3PK 2.4Ghz system. Servo is a Savöx SC 1251MG LowProfile Servo if not mentioned yet. I think the rest of the pictures are self explaining:

[ManuelW]

[ManuelW]

[ManuelW]

The RTR weight of the boat is now about 5800g with LiFe Receiver pack. The test run was made at less than 0°C so it was very cold. I used a pair of Octura X447 cut to 45.5mm for the test. As it was the first real test and the CG and the trimms where not yet set right I couldn't give full throttle because otherwise I'd have to pump up the rescue boat which I didn't want. But setup seems to be pretty nice, I estimate the speed around 120km/h.

Video of the Test Run:

http://www.mb-forum.at/video_hpr_06_wolfgang_2.testfahrt.wmv

At the moment the hull is sent away to get a paint job. I hope you enjoy this review and my work, I'll continue when the boat is back from painting and I can present it as well as the rest of the testing before I'll hand it over to its owner.

Have a nice evening,
Manuel

[Anbjorn]

Nice and clean job Manuel.
Anbjørn

[DISAR]

Nice, well done.

What timing did you use?
I have the same setup and same props in my sprintcat 35" except that running on 5s, now I will run 6s!!! I suppose your temps were ok?

[ManuelW]

Hi Dimitris,

Timing was set to 11.25° with the ProgCard. If the hull is back from the paint job and ready for testing I want to try a pair of Octura X447's Andy Browns and then may increase the timing stepwise. Temps were ice-cold, like the water, the air, my hands & everything else.

Best regards,
Manuel

[Himalaya]

Brilliant thread. Man you build boats with your soul.

[ManuelW]

Hello Himalaya,

thanks for the nice comment. But I looked the pictures of your HPR Building thread (couldn't read the text there and translator failed) and you also put a lot of effort and time in your boat. But I think HPR's really are worth the investment!

Best regards,
Manuel

[ManuelW]

Hello Guys,

here the final results of my build:

[ManuelW]

[ManuelW]

And here a video of the last test run:



I wish you a nice evening,
Manuel