(Another) Crash Rescue Tender Restoration

Started by neilw

9 updates 79 likes 41 comments
neilw Opening post 1

(Another) Crash Rescue Tender Restoration

As I seem to be working on two models at the same time I thought I'd attempt the document the Crash Tender Restoration. It was the purchase of this one that led me to this site.

This one was also found by my wife, this time on FaceBook Marketplace for £35. so a quick trip to Paignton meant I'd bought another boat.

I suspect it is an old Aerokits 34" model, the panel pin heads are obvious in a few places. The hull was in decent condition, there was a dent each side soon disappeared with West + micro balloons.

I pulled the prop shaft out and found that is was a 3.67mm dimeter shaft with plastic bearings that had an O/D of 6.28mm, the outer tube had an O/D of 8mm. The plastic bearings had a lot of wear but rather than try to source replacements I thought I'd replace the outer tube and prop shaft. Thinking I'd have a major job to remove the tube it was a very pleasant surprise to find that I could just twist it with a pair of pliers and easily slide it out. The rudder tube also came out very easily.

I've painted the hull withe Hempel Multicoat just to get all a uniform colour to see of any fairing is required. Seems to be a decently built hull requiring little work, so hopefully I'll make some progress on it when I'm waiting for paint or glue to dry on the Perkasa build.
Liked by DaveWhittaker and MouldBuilder and
8 comments
  1. Stephen TBronze
    Captain
    yes I have gone down the pump assisted system are you going to take the water from underneath using one inlet or two this is the confusing bit now I have rebuilt the hull some go under some go at the bottom of the stern and outlets at the top on the real thing there are variables as well
    Liked by RodC
  2. neilw
    Lieutenant Commander
    I’m using one intake in the prop wash for the watercooling of the ESC and the other pickup (position yet to be determined) for the pump for the monitor.

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neilw #2 of 10 1

(Another) Crash Rescue Tender

Decided to spend some money with Slecuk. New prop shaft, motor, coupling and ESC arrived this morning. Assembled the motor mount yesterday, impressed that it all fits, but only just. The supplied flexi coupling is quite long, but is a narrow diameter so doesn’t interfere with anything. There isn’t space to fit an oiler forward of the bulkhead so that will have to go in the next section behind the bulkhead.

Just need to fit a pair of longitudinal bearers to secure the motor mount plate. Next to find suitable locations for the water cooled ESC and LiPo.
Liked by DaveWhittaker and hermank and
1 comment
  1. Stephen TBronze
    Captain
    hi i have in mind two in the Keel as per the original one was shorter than the other seems lot holes all in line but on my pre build there was narrow plate fixed down outer rudder then short intake and long intake its 1/2 inch difference why two who knows the put to outlets at the top of the stern what do you think
    Liked by Colin H

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neilw #3 of 10 1

(Another) Crash Rescue Tender Restoration

With the Perkasa nearly finished I'm able to dig out the Crash Tender again while the last few pieces of gluing and paintwork on the Perkasa dry off.

I have done a little of work on the Crash Tender a few weeks ago, but looks like I didn't take many photos.

While fitting the new motor and prop shaft I read about using red primer for below the waterline so sprayed the bottom of the boat before fitting the prop shaft, also fitted a new rudder shaft as the original one was held in by paint only.

One of the jobs that took an age on the Perkasa was finding and scribing the waterline. As Amazon were doing an Xmas deal on laser levels I spent £15 on a cheap laser, set it up on a tripod and had the waterline sorted in a couple of minutes. The hull then got its first coat of black paint.

I have spent a fair bit of time looking at photos of the full sized boat and other models, decided to add a toerail, so glued a strip of 1/16" obeche in place.

Today I knocked up a stand for the boat as it is now going to spend some time on the bench. Have to say it is lovely working on a smaller boat, the Perkasa got a bit unwieldy so it a delight to be able to easily pick this one up and move it about.

With the boat on the build stand I managed to get the decks sanded and primed, need to do a bit of fairing but there's not a lot to do to the hull and decks apart from paint.
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3 comments
  1. Stephen TBronze
    Captain
    Least you did not have the infestation problem I am going down the non red primer route whilst it looks right I am not sure about its waterproof qualities on a wooden boat fibreglass yes, I see you have the spray set being 😆asthmatic doesn't look right! I have to go with paint over sprays and any spraying I have a small home made booth for such jobs that vents out side the workshopI have a pile of spare white metal parts if your anything missing
  2. neilw
    Lieutenant Commander
    Hi Stephen,

    The red primer is over a couple of coats of Hempel Multicoat, it has adhered nicely. I don’t spray big stuff in the workshop, the airbrush is mainly used for acrylics and I wear a very good respirator as I do a fair bit of GRP and epoxy work on the other boats.

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neilw #4 of 10 1

Going to look worse before it gets better

Now I have some time to look at the Crash Tender it’s noticeable that the superstructure isn’t square.

The front bridge roof was out by about 4mm so today has been spent getting the roofline sorted by adding some material on one side while removing excess on the other side. Also spent some time rebuilding and fairing in various edges than have worn over time.

Managed to find some ply to build the missing deck between the cabins, is a nice tight fit so is removable. Thanks to those replying to my question about this deck on the forum.

I’ve also removed all the hand rails and filled the holes left by taking out the fittings. I’ll fit new ones later as I want to fit the scramble nets.

Have several hours of fillings and fairing left to do before I tackle the false floor in the rear cockpit.
Liked by DaveWhittaker and Colin H and
2 comments
  1. Stephen TBronze
    Captain
    Just a thought I trust you haven't pinned the cabin roof down as you have the windows to put in I made that mistake and had to take it off again, see these boats are not easy the law of all sods steps in when you don't want it
    Liked by Colin H and neilw
  2. neilw
    Lieutenant Commander
    Hi Stephen

    The two side panels of the roof are easy to remove, the centre panel is firmly fixed in place. I reckon there is enough room to fit windows and paint the interior with just the side panels removed.
    Liked by Colin H

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neilw #5 of 10 1

Progress is being made

I’ve been working on this one along side the RTTL, but keep forgetting to update the blog.

When the RTTL gets painted, the crash tender gets the same. Have done some other work though, the foreword port holes are cut, the bridge deck is in place and I’ve been sorting out the rear cockpit. This was slightly tricky as I’m working on an old hull so have to put the floor in where I can as the stringers were all ready in place, though I’ve levelled them up the best I can.

The hull now has the final coat of paint on the bottom of the hull, and the cabin roofs benefitted from the white painting session I had on the RTTL.

The next paint job is the final coats of black hull paint for this one and the RTTL
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6 comments
  1. flaxbybuck
    Captain
    I take it you used smooth finish black Hammerite Pete ? Did Hammerite react with oil based paint ?🙄
    Liked by TerryH
  2. Stephen TBronze
    Captain
    I see that you have a way from standard aft with a hole in the floor rather than the whole floor lifting out is that your mod to get to where the servo is
    Liked by Scratchbuilder

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neilw #6 of 10 1

You can have any colour as along as it is black

Today was very much a black paint day. Both the Crash Tender and the RTTL had the black hull paint cut back with 240 wet and dry and hopefully the last top coat applied. The Crash Tender is looking good, the RTTL might need another coat, will have to make my mind up in the morning.
Liked by Scratchbuilder and Stephen T and
5 comments
  1. BarryS
    Warrant Officer
    Painting two at one time is efficient. Also, my wife's favorite color is black, odd though it seems she will always pick black.
    I know when I pass through the pearly gates she will have me in a black suit . . .
    Liked by neilw and Colin H
  2. neilw
    Lieutenant Commander
    Well, that wasn’t quite the last coat. Needed a little bit more depth and to be more black so flattened both hulls back with 240 wet and dry and applied two thin coats in quick succession with a Jenny Brush. Looks to be a nice flat black now, which is what I was looking for.

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neilw #7 of 10 1

Window fettling

I’ve been working on this one alongside the RTTL, it now needs the final coat of grey deck and cabin side paint.

The job I couldn’t put off was the dry fitting of the windows. This needed to be done before the last coat of grey paint as I knew I’d have to make some adjustments to the window apertures. One of the problems of working on an older boat is the lack of control over what the previous builder has done and what dimensions were used in the original kit.

All the window apertures were fine in terms of height but all needed extending by a 1mm - 2mm to take the windows I have for the boat

I’d bought the window kit from SLEC and sprayed the frames an aluminium colour and glued the acrylic windows onto the inside face of the frames. In theory the acrylic should fit into the aperture and the frame only sits proud of the cabin side.

So today has mostly been spent using a selection of small files to adjust all the apertures so they will accommodate the SLEC windows. Very fiddly but very satisfying when the window and frame slot in nicely into the aperture.
Liked by DaveWhittaker and StephenT and
4 comments
  1. flaxbybuck
    Captain
    I like the look of your completed window frames. I have spent a long time trying to get some looking right for the boat. The choice of paint makes such a difference. My final choice was a 'chrome effect' spray paint. At first sight, close to, it looks to be dark grey, but when viewed from a distance it does give the same effect as chrome plated frames. Very satisfying.😉
    Liked by neilw and Scratchbuilder and
  2. flaxbybuck
    Captain
    Apologies for not being clear in my last post. I have been making window frames for a boat which is under construction. After trying a number of different methods unsuccessfully I used thin ply. The apertures were created first, and using a small sanding drum on my Dremell were very carefully shaped to the final profile. The outer profile was then cut and sanded to shape. This had to be done really carefully to achieve the correct frame width without taking off too much. Not an easy task.😉
    Liked by neilw and Scratchbuilder

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neilw #8 of 10 1

Yet more bits and pieces

I’ve been away for a couple of weeks on holiday in and around the Norfolk Broads.

Now I’m home it is time to finish the Crash Tender.

All the windows went in OK and the decks are nearly there, just a final coat to apply. I’m happy with the cabin sides and cockpit, the deck needs one more coat.

I’ve moved the outlet from the water cooling to the transom as the side exit I had on the RTTL looked wrong (will be moving the RTTL exit later). Have all the plumbing in place for the water cooling and the monitors, have a water pump installed for each circuit.

The fittings are a combination from SLEC and from this site. The rear cockpit ladders needed shortening as I was limited by the original 1960s build for the position of the cockpit floor.

Have spent a while cleaning up the metal fittings and have sprayed them a brass colour, possibly not authentic but I like the way they look.

Have all the fittings painted, so next week I should get all the fittings on the boat.
Liked by DaveWhittaker and StephenT and

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neilw #9 of 10 1

Finished (hopefully)

This one was mainly completed a couple of weeks ago, finally got the last few fittings on today ahead of my club’s open day tomorrow. Hopefully I’ll get some decent pictures/video of her on the water.

She has been out a couple of times, the first time was OK but the battery was too far forwards and was sailing bow down. I repositioned the battery, ESC and pumps and took her out last week, and she flew.

She still needs a little adjustment of the waterline but I’m quite happy with her now.
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7 comments

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neilw #10 of 10 1

Success

Got both the RAF RTTL and the Crash Tender out today at the club open day. Should have some video later in the week.
Liked by DaveWhittaker and Fred and
5 comments
  1. neilw
    Lieutenant Commander
    Bill, I made the mistake of using the term GoPro when I should have said Faux Pro, a few years ago I spent a lot of money going down the GoPro route as we were doing endurance 4x4 events and I was doing some serious dinghy racing in the Finn Class.

    Had some decent results but the GoPro stuff was expensive. Changed to GoPro copies as cheaper if I lost or broke them also got fed up with GoPro pricing.

    Found the 4k Akosa were very robust, waterproof and if I destroyed one it wouldn’t be the end of the world.

    Have fitted these to paddle boards, racing dinghies and Land Rovers, have yet to break one!

    This is what I’ll mount one one of my boats
    https://www.amazon.co.uk/dp/B01HPXH29Q/
    Liked by Scratchbuilder
  2. Scratchbuilder
    Vice Admiral
    Neil.
    Thank you for all that info.
    I shall investigate further.It’s always good to get 1st hand knowledge 👍👍
    Regards
    Bill
    Liked by neilw

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