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Here how it looks inside the boat:
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mount for the fuel filters
Christian decided to use two fuel filters instead of one. Normally one filter is used between the fuel pump and the Y-connector. His are before the 2 magnetic vents, one for the cerosene for the turbine and one for the start/ignition system. Beside each other there was not enough space in the box so he aligned them vertically. So he made a few drawings of the mount first, then filed out the single parts before he glued them together. The filters are clipped in from the side and fixed by the nut on each end.
A few pictures show it probably better than I could explain!
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mounts for the magnetic vents
Each turbine has two magnetic vents which control and regulate the fuel supply during startup and running. As it was done for the filters he also aligned the vents vertically by a special mount. This time it was made from a turned aluminium part (T6 7075 aircraft aluminium, polished for sure). A big aim he had was not a single visible screw. So first he turned two pins with one rounded end, then cut them into pieces. One step before that he drilled two precise 3mm bores, these had to be absolute exact as they were given by the vents. On the bottom part he made a countersunk for an M3 screw, he even had to reduce the diameter of the head to the minium of 3.9mm. In the top part are some M3 threads so he can assemble each unit from the bottom invisible. After some little polishing also of the vents he assembled it as a unit with the fuel filters. I think it looks pretty nice.
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on this picture you can see the M3 hex screws with countersunk in the bottom part:
and inside the box:
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So for today it were mainly small parts, I hope you still enjoy these as these small parts take a lot of time.
As for sure feel free to add comments, questions, remarks and so on! We appreciate that!
Wish you a nice evening,
Manuel
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Fascinating.
Exquisite workmanship.
One asks what time taken to present this perfection ?
Wayne in Au.Wayne Schutte PhdCSE BaSE BaEE. Australian, & damn proud of it
YOUTUBE
@ 36" H&M Maritmo twin1512/1800 6S1P 88mph @ 40" drag hydro#1 twin 5692 12S1P .....always for fun @
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Is Christian the lead fabricator at west coast customs in Berlin as a day job? LOL!"If you can't win - Wreck someone who can!"Comment
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Truly amazing the time and expertise it would take to create such a magnificent boat like this, my hat is off to you my good manComment
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Truly amazing!!!
He is a true perfectionist.
I am normally very careful with my builds but he is on another planet . I applaud his work.
Cheers
JCComment
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fantastic work.....and as i m also in the machining job,one think comes to my mind (like asterix and ovelix)...maby, when christian it was a small children,he eat a C.N.C controler.... very good for my eyes to see yours building...greetings from greece,manuel and cristian.....Comment
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Hello Guys,
today a bit more about the progress of the RC box.
@ drwayne: That would interest me as well - already told Christian a few times to document it. But for the build up to know I'd say already around 150-200 working hours.
@ metalsak: Thanks, especially as you also work a lot in the machining job. Kostas sends me nice pictures from your work from time to time over Facebook. Always a pleasure to see.
more lead-throughs in the RC box
Beside the lead-throughs for the main cables between ECU and turbine there have to be a few more. So thats another load of work to to. To be exat:
-2x fuel input through the bottom of the box
-2x 2x fuel output through side walls (1x fuel and 1x cerosene start per turbine)
-2x rpm sensor per turbine
-2x charging link (1x 2S LiPo for turbines, 1x 2S LiFe for receiver)
For the fuel lines he used special lead-throughs availabe by Vario Helicopter. The are made of soft rubber and the holes have to have the right diameter to be sealed. If the hole is too narrow you can't put the fuel line through, if it is too big it is not sealed. So he pre-drilled it with a small bore and then used sanding paper to get it to the right diameter. The charging plugs for the 2S batterys are Multiplex MPX-System. I ordered Christian several of them from Nessel Elektronik, they are the only ones who have these in black and not in the usual green. Again the rest should be clear from the pictures. For sealing he also used a black colored silicone, normally used to glue fish-tanks.
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2S battery for turbine ECU's
The turbine itself needs a 2S Lipo battery as supply - standard is a 3300mAh lipo per turbine. But Christian perferred a single 2S Lipo for both turbines. So I ordered him a 2S 5800mAh 30C lipo from turnigy, it was also confirmed by JetCat that it is enough. When I received it I checked the batterys and then stripped it and removed the original cables and the balancer cable. On each pole I soldered three 2.5mm² cable (high flexible from Nessel Elektronik), for the balancer a single 1.5mm² cable between the two cells. So each ECU has now its supply over 2x 2.5mm² cable and charging is over 2x 2.5mm² wire with the additional 1.5mm² balancer wire. As you can't connect these MPX connectors wrong I used black wires on both poles as it looks better inside the box. Then I used black shrink tube. That was the work from my side.
For mounting the lipo in the RC box Christian created some kind of extra box or cover for the lipo out of 0.6mm CF sheet and some little mounts out of Aluminium.
On the last two pictures you can see my soldering job with the extra cables.Comment
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final wiring in the box
As for sure Christian wanted to align all cables and connectors as nice and possible. This also included nice soldering and the right shrinking on the connectors. There is very little space under the LED boards so he had to solder the cables in a 90° angle. Therefore normal shrinking was not possible but after a few tries he was satisfied with his work:
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but still quite some work to do:
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