Revell Hermann Marwede 1/72 RC Conversion

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Postby wibblywobbly » Tue Oct 18, 2016 10:22 am

I am well chuffed with it. Not the easiest build in the world, thanks to Revell not providing mounting points for the smaller parts. I am just glad that I bought some Contacta styrene glue with the needle applicator, and some Gorilla Super Glue, along with white superfine Milliput. Without those this would have been a complete and very messy nightmare.

The plastic is pretty good though, it bends rather than snaps, which is what is needed for an RC build.

I gave the empty hull a test run in the bath using an RX18 and it all worked, it even seems to steer ok, but I won't know how effective that is until I can try it in open water. The only slight issue I have is that the stern has a very shallow draught, the weight of a battery takes the empty hull down to the exact waterline and holds the props underwater. When I have the superstructure on I will have to do some jiggery pokery with ballast to get it floating and running at the right level. If I can get the running gear in the stern then I can totally seal the front deck down, which will make things much easier.
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Postby wibblywobbly » Wed Oct 19, 2016 9:40 am

Managed to shoehorn the electrics and running gear in. It's all 100% watertight, it goes forwards/backwards etc, and turns on the props though for some reason it turns better one way than the other, though this may change in open water.

I have been using coins to ballast the hull as I can take them in and out and move them around to get the weight where I need it, and everything including the battery is mounted securely to ensure that there is no weight transfer and a capsize when it's running. I am running 2mm shafts which are made from very soft metal, and one is out of true. The good side runs silky smooth but the other vibrates. Getting hold of hardened stainless 2mm shafts with M2 thread on only one end is proving rather difficult. so I may have to try and true up the one that I have, or buy another.
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Postby silversurfer1947 » Wed Oct 19, 2016 2:55 pm

If it's of any use, I have some lead shot you can use for ballast.
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Postby wibblywobbly » Wed Oct 19, 2016 4:09 pm

Thanks for the offer but I think that the coins will do the job, it doesn't take much to bring it down to the waterline. I have spent today ripping everything out of the hull, and using a heat gun to warm the plastic and gently easing the whole thing straight again. It's as close as I can get it, not 100% perfect but better than it was. If it looks out of true when the decks go back on I will write and ask Revell for another one, I'll have nothing to lose.
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Postby wibblywobbly » Wed Oct 26, 2016 9:03 am

Made a start on painting. Used rattlecans for the white as an airbrush would take all day. White primer and satin white topcoat, Vallejo Military Green for the decks, and Vallejo Bright Orange for the orange parts. Still loads more to do but it's looking like the one on the box lid now.
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Postby PainlessWolf » Wed Oct 26, 2016 4:00 pm

Good morning,
Is the Launch big enough to put a micro motor, tiny board and RX into? You could have a crane powered by a servo launch the 'launch' and have it make a run around the ship then get picked up again ( by a magnet on another crane ) ;o) This whole job is looking amazing!
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Postby wibblywobbly » Wed Oct 26, 2016 4:14 pm

Funnily enough I came across a build on the web where someone had done exactly that, he even had a rudder powered by two tiny coil magnets. Amazing though that was, I won't be going down that path. I will consider it an achievement if this whole thing actually floats! Just breathing on it is a liability. 8O
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Postby RobW » Wed Oct 26, 2016 7:43 pm

Look at it this way. It'll make an excellent shelf display if it doesn't float, and will be easier to recover than an aeroplane that's sunk!

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Postby wibblywobbly » Sat Oct 29, 2016 11:10 pm

I'll be glad when its finished, I keep thinking there isn't much more to do but then hit another problem. The painting took a week?

That said, the front raised deck can be glued and sealed, the rear lower one can be removed via screws to access the battery, propshafts, and RX18, and there is an on/off switch on the rear deck. Ballast is only in the front and is coins that are epoxied to the bottom of the hull.

I have to keep thinking four steps ahead as once something is glued in I can't risk blocking access to something else that I need to do, and I need to ensure that whatever I do by way of the build, that I can still get the rear deck off. There are gantries and cranes that bridge the two on the static model, but I can only attach one end on the RC conversion.

It's getting there though. :thumbup:
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Postby wibblywobbly » Mon Oct 31, 2016 9:52 pm

On the final run now, all of the painting is done, I have built the launch that goes in the rear, all of the windows are in, the front deck is glued in. Need to affix the decals, and solder up the switch wiring, then give it a going over with satin clear coat.

The colours look a bit washed out in this lighting, the orange bits are deep orange.
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Postby wibblywobbly » Tue Nov 01, 2016 4:38 pm

This will be the last set of pics as everything is now done, even the on/off switch works :D The heli deck is so small that I can't find one in 1/72 scale that will fit on it, apparently it is only used for dropping off crew etc, rather than actually landing on.

If/when this ever takes to water I'll try and post up a video. Just found out 10 minutes ago that the house move that I have been waiting for over the last two months is going to be on or before 18th of this month...nobody told me! I now have a mad panic to organise a hundred and one things and get packed. >:<

At least I will be able to get back to tanks and get the T90 done soon. :D
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Postby silversurfer1947 » Tue Nov 01, 2016 4:40 pm

Good luck with the move. My offer of help still stands.
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Postby wibblywobbly » Tue Nov 01, 2016 4:44 pm

I've forgotten...what was the offer? :|

Pm me if you like.
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Postby Bogeyman » Tue Nov 01, 2016 6:36 pm

Well done Rob, she looks very nice, and all for a bargain price !!
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Postby PainlessWolf » Tue Nov 01, 2016 7:44 pm

W.W.,
A feast for the eyes. Beautiful paint and detail! Video of the Maiden Voyage when you can, please.
regards,
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Postby wibblywobbly » Tue Nov 01, 2016 8:29 pm

Thanks for the compliments, I know it's not a tank, and it may yet turn out to be a very cheap submarine, but hey it kept me busy for a few weeks. I can't take any credit for how it appears as all I have done is follow the instructions and build it, my only input has been the cheap and cheerful RC installation, and changing a couple of parts to make it possible. The Revell part is evident, the Wibbly part is as yet totally untested!! 8O
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Postby wibblywobbly » Wed Nov 06, 2019 1:16 pm

Well this thread was started in 2016, and it is almost 2020, you can't rush these things you know? :haha: :P

I had an opportunity to test it in a flooded quarry last weekend, plenty of shallow water in case it all went pear shaped. It worked really well, the RX18 is a super cheap way of powering a twin prop ship that doesn't have a rudder.

In order to smooth things out I have ordered some new prop shafts, and new universal coupling. Hopefully this will sort the vibration on one side. I was quite pleased with how it ran, it's a cheap way to get a decent sized ship running without spending a fortune.

phpBB [video]
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Postby Son of a gun-ner » Wed Nov 06, 2019 1:30 pm

That's awesome Rob :thumbup:
What a good way to use an old tanks electronics :thumbup:

And what a fantastic play area, that's brilliant :thumbup:
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Postby PainlessWolf » Wed Nov 06, 2019 4:50 pm

Good Morning,
Great control there! For a ship with no rudder, it gets around as quickly and cleanly as an Outboard ( scale ) powered boat. Worth the wait!
regards,
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Postby 43rdRecceReg » Wed Nov 06, 2019 10:16 pm

A pleasant departure from the norm, and a value for money kit, by the look of it! :thumbup: I also like the A Himitsu (featuring Nori) track playing in the background of your 'sea'-trials, Rob :thumbup: Nice.
I have a sea loch 100 meters below my house, but it's far too wild mostly(tidal and Deep) to float anything on it I'd hate to lose. Still, my neighbour has his very own Lochan (mini loch- or big pond :D ). It would be ideal for a boat like yours. Hmm.. that's given me an idea... :think:
I'm not sure the resident ducks will be that keen on a destroyer, or a sub, cutting thought their peaceful waters, though without a protest.. :D
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