MHZ Mystic 1850 (73") bullet proof/Lehner 3080/TMM 40063-3 X2 PRO

[jj2003]

Beautiful build Yamadori! The pearl white is awesome! JBS has been my favorite scheme by far and your mod's are just right! I have a somewhat unrelated question. I have similar dummy hydraulics for my 93" HPR build and I'm looking for the cables to pull the rudder. Any place you could recommend to purchase them? Or anyone else for that matter?

[Yamadori]

Beautiful build Yamadori! The pearl white is awesome! JBS has been my favorite scheme by far and your mod's are just right! I have a somewhat unrelated question. I have similar dummy hydraulics for my 93" HPR build and I'm looking for the cables to pull the rudder. Any place you could recommend to purchase them? Or anyone else for that matter?

jj,

I'm not sure I understand what's bothering you...you say you already have hydraulic arms...shouldn't they come with cables right out of the box? My hydraulics are MHZ and they have cables glued in when you buy them.
So, either you have bought "just dummy arm" which is suposed not to work but just to act as a hydraulic arm while in the same time rudder is operated with a rod connected to servo, or you have bought real hydraulic servo arms but the cables are too short for 93" ?
Please explain :)
Thank you for your kind words bout my boat :)

[Yamadori]

No issue either way as in such. I have tried both ways on all my cat hulls and found: If spinning outward the hull will handle better in corners and in general up to about 70mph. MHZ 138 (now belongs to Steve) pulled 165amps at 80mph. Same setup with inward spinning pulled 142amps and had no handling issues past 70mph. I believe Steve now runs inward spinning in excess of 100mph with good stability? Maybe Steve can comment? All my cats spin inward, but there are cats out there that will not run right that way, so it is definetely hull dependent. Steve's MHZ 185 run inward also. If not mistaken she's quite stable?

Thanks nata, that's what I thought. It really doesn't matter that much. I have programed ESC to spin inward and I will leave them as they are :)
My Maritimo H&M also spins inwards

[Yamadori]

Let me show you what I use as absolutely waterproof receiver box.

If you do not want to use big electric boxes which can have battery, servos and receiver inside and if you want to waterproof receiver only, you can use RC car receiver box from some type of vehicle that is designed to be waterproof...
This is Traxxas Summit waterproof receiver box
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Use a piece of Velcro tape..
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And attach it to the bottom of receiver box
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[Yamadori]

Attach the receiver on a Velcro tape inside the box DSC08016-001.jpg



Apply sylicone grease which comes with the package on water seal where receiver wires will go
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[Yamadori]

Pass the wires under the water sealed edge

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And close the lid on the water seal with provided screws...

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[Yamadori]

Connect the servo wires ...

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On the bottom of receiver box there will be two holes for screws that should fix the receiver box for the chasis of an RC car...
Close those two holes with a fast curing epoxy...I use 5 min epoxy

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Put the rubber seal on the main receiver lid and previously grease it with a sylicone grease

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[Yamadori]

Close the main lid with two provided screws...

pass the antenna wire through the antenna lead on the side of the receiver box...

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Closed box bottom view with sealed screw holes...

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Side view...

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[Yamadori]

Finished and completely waterproof receiver box.

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Do not use baloons, plactic bags, condoms and similar stuff :)

This Traxxas waterproof receiver box costs only 10$, it is possible to open it many times for servicing, leaks no water at all, and also looks good. Good quality plastic and very firm.

I attach it for the bottom of the hull with a piece of Velcro tape. I use servo extension connectors from the receiver box so that I can unplug the whole system, detach it of the Velcro tape

and everything is out of the boat in 10 seconds

That's it :)

[worriedsick4u]

With all due respect. If the interior gets wet enough to damage your rx, what are you going to do about your esc's?

[Yamadori]

With all due respect. If the interior gets wet enough to damage your rx, what are you going to do about your esc's?

I don't know :)

MGM says ESCs are fully waterproof...

[Yamadori]

If they get dammaged, probably send them back to MGM for servicing :)

[worriedsick4u]

Only if you ordered them that way. It's not a standard. They come water resistant with an option to waterproof. Great idea you have anyways.

[Yamadori]

Only if you ordered them that way. It's not a standard. They come water resistant with an option to waterproof. Great idea you have anyways.

worried,

yes, I have ordered them fully waterproof.

but, listen, there is more behind that....my experience is ...if a small amount of water goes into the boat and if it is too small amount to affect the ESCs....splashing of that small amount of water can reach the receiver, wet the wires and cause the receiver to function erraticaly.
I have had that many times while I was driving on the sea and when water wasn't calm but choppy. Then I was driving the boat with water resistant ESCs but cheap ones, receiver was packed in the ballon and tyed with plastic zip tye.
Some water entered the hull, nothing happened to ESCs or anything else, but splashed the receiver and the boat went here and there like crazy, I couldn't control it anyway, so it eventually flipped over and I went swimming to get it back :)

So I think it is very important, if not the most important to protect the receiver from water :)

[oscarel]

Looking at an ealier picture the esc has WR on it, which means its fully protected. What did they say about being able to service it if something does happen? And the Traxxas boxes aren't 100% waterproof either, take care when sealing them and also grease the blue seal for the case. I use them in open topped gas boats and recently switched to a little bigger box that will hold the lipo as well and allow you to see if any water is in the box.