I’m ok with the boat sitting next to me while I work.
A kitchen full of snacks within walking distance would be my downfall!

@Ronald I think claiming to be a veteran would be a stretch for me.
I was just an instructor in the Air Training Corps for several years - similar to your Canadian Air Cadets.

Although I did get a real Queens Commission in the RAF Volunteer Reserve Training branch, it isn’t quite the same thing as doing it for real.
The most danger I was exposed to was teaching teenagers to handle service rifles and LMGs, which isn’t that dangerous at all in reality.

I’m a bit late to the party, but I have a desk in my office at home that I am using to build my latest (first) project. The other desk with the monitors is where I work from home, complete with aircraft prints on the walls and a blanket for my cat to curl up on.
It’s a bit of a mess as usual.

Hi John, Chris, thanks for the suggestions.

Adding a jig on the outside of the hull is something I think I'd do next time - the metal motor mount I used basically provided the interior jig, but I eyeballed the outside, which was OK, but fiddly, and prone to error.

I also like the idea of the putty/filler on the underside for sand ability. I did try to sand the epoxy on the bad side, but it is pretty impervious, which is good from a fixing perspective, but less so from a fixing mistakes perspective.

For glue application I've reverted back to my primary school days with the wee plastic spreaders!

Thanks, that's a handy tip for next time. I don't think it would have completely saved me from the epoxy going off, but if I combine those two lessons I'll likely get a better result next time.

I've got a variety of options with the throttles including various mixing options in the transmitter, fully independent control and using a splitter to run both motors from a single channel.

I'm starting with fully independent control, but I'll definitely have a play around with the configuration of it to try and find what works best for me and my hand eye coordination limitations.

Another long post I'm afraid...

I got a pair of 1.4" scale propellers from Prop-Shop a few weeks ago - one right hand and one left hand, so I could have them turning in opposite directions.
Around the same time I got a couple of 8" 4mm shaft/6mm tube propeller shafts from Cornwall Model Boats. At the time I was guesstimating the length I needed, but I turned out to be OK in the end. I also bought a couple of propshaft fitting sets because it didn't look like the shafts came with enough bolts (which turned out to be correct) and some shaft oiler kits, which I didn't end up using.
Just so Amazon didn't feel left out, I got some solid couplings and universal couplings from there once I knew the shaft size on the motors I was going to use.

Given the shallow angle that the shafts are going through the hull I knew I'd have to drill several holes and join them up, but the holes were alarmingly large (for a first timer anyway) by the time I got anywhere near being able to align the shaft with the motor. The holes ended up wider and longer than they really needed to be while I was messing about trying to get the shafts to align with the rudders and motors and still have propeller clearance. Maybe I'll be better at that next time round, but somehow I doubt it.

I used lots of two part epoxy glue to fix the prop shafts in place, starting with the inside of the hull. This didn't have to be too neat, but it did try to drip straight through past the pro-shafts at first, which could have been messy if I wasn't expecting it to happen.
Once the epoxy was dry on the inside, I repeated the process on the outside. As you can see from the photos, one side looks relatively ok, but the other looks like it was done by a 3 year old. I think this was because I was mixing too much of the epoxy at one time and it was starting to go off by the time I got to the messy side. Not my finest hour, but I'll know better next time and nobody will see it much so it's not the end of the world.

Once the shafts were glued in place I removed the inner shafts from the tubes and greased them before replacing them in the tubes. I used gun grease for this because I think it's a bit lighter than the bike grease I also have, but also because it was in the house and didn't involve walking out to the shed.

To attach the propellers to the shaft I added some locktite to the threads and also used the nut that came with the shaft as a lock nut. Before doing this I checked several times that the right hand shaft would push water backwards when rotated clockwise when viewed from the rear, and anti clockwise for the left hand shaft.
At the other end of the shaft I again added som locktite, then tightened up the nut that came with the propeller shaft until there was a tiny bit of play and the shaft still turned freely. I then used one of the nuts from the shaft fixing kits as a lock nut.

One thing I hadn't considered, but was pretty obvious, was that once the propeller shafts were fixed in place it would be very difficult to get the motor mount back out. I did manage it in the end, but the forward bracket to hold the propeller shafts had to be glued in place on refitting because the screws were impossible to refit. If I do this again I'll make sure the mount is ready to be glued in place before, or at the same time as the shafts.

In the end I couldn't get the shafts and the motors to line up exactly, so I used the universal couplings rather than the solid ones. The universal couplings were a little longer, which turned out to be useful. The universal couplings used a grub screw to fix the shafts, so I had to file the propeller shafts a bit to get a flatter section for the grub screw to tighten onto.

With all the drive train fitted I put the ESCs and batteries back in (I glued some velcro straps to the hull to keep the batteries in place), programmed the ESCs and limited the motor outputs to 60% in the transmitter. I then gave the boat another float test in the bath to make sure there were no leaks and that I'd got the propellers on the right way round - thankfully I had!

On the RC side, I've gone for a channel per throttle, which will allow me to control each motor independently. The only issue with that is that the transmitter I have only has one stick that is non-centering. Flysky RC sell replacement throttle modules and I've ordered one, but it is still enroute from China, so that's a job for another day.

The centre of gravity seems pretty central when I balance it in my hand and it looks pretty level by eye, it just doesn't match the water line on the model.
If it runs OK, I guess that just means I got the waterline wrong!

I haven't thought about an absolute number for the propeller shaft angle before tbh, but looking at the plans with that in mind, 10 - 12 degrees is roughly what it has them set at.
Something around 12 degrees should be achievable - there might be some tweaking to do with the motor mount and I'll have to get the holes in the hull in the right place.

I have some thinking time left as the hull is too tight for a drill, so I'm waiting for a pin vice that will take a drill bit big enough for the propeller shaft holes.

I've never done any RC models before, so I've been putting off buying motors and all the RC components to make everything go while I try to read up on it all.

After fitting the rudder the other week I realised that to test it I'd need to buy all the things I'd been putting off - The rudder servo needs to be connected to the receiver, which gets power from an ESC, which gets power from the main LIPO battery, which in turn needs to be charged.
Hence no blog post last weekend because I was still waiting for some things to arrive.

My final major component shopping list from Amazon was as follows:
Hawk's Work FS-i6X 10 Ch Transmitter, with FS-iA6B Receiver
Two Ezrun Max10 G2 80A ESCs with 3652SD 3300kv G3 brushless motors.
Injora Low Profile Digital Servo
Two Hilldow 2S Lipo 5100mAh Batteries with an XT60 Connector
ISDT PD60 60W 6A Lipo Balance Charger
Hobbywing 30501003 Programming Box for the ESCs

Given what I've read, the motors may be too powerful. Time will tell, but the transmitter has the capability to dial back the output of channels if necessary, so my only real worry is excess weight being a problem.

I also got a metal double servo arm and rudder arms to replace the plastic ones and some threaded rods and ball head link joints to join them together.
As you can see from the photo, I decided to link the servo to the inner rudder arms.
I've tested this setup and I can get what looks like a decent amount of rudder deflection without pulling anything out of shape, or binding.

One thing I've been quite concerned about was mounting the motors in the hull. I found some nice looking mounts on Amazon and a site called 'Noah's RC Ark' that have three cast aluminium pieces clamped between two side plates - two to clamp the motor and one to clamp the propeller shaft at a fixed angle. Unfortunately they were a bit pricey, especially on Amazon. In the end, since the mounts were Chinese imports anyway, I decided to cut out the middle man and look on Ali Express where I found the same thing for a third of the price.

The motor mounts took some modification to fit the motors that I had bought, and to fit into the hull.
I had to add some metal standoff bolts because the motor was too short to bolt it directly to the middle aluminium plate.
I only used the outer two of the four side plates and added threaded rods to bolt the aluminium parts together to turn two single motor mounts into one twin motor mount with the required 75mm/3" spacing.
I also had to cut the front part off of the side plates in order to get the assembly to fit between the bulkheads.

After the modifications, there were enough side plate parts left over to make mounts for the rudder servo, the ESCs and the receiver, so they turned out to be a really good buy.

All the mounts (excluding motor and battery) have been fixed in place, and the components clamped to them to make sure I'll be able to get at everything once the deck goes on.

I managed to put everything in where it will eventually go tonight and gave give it a float test in the bath.
It sits very slightly bow down with two batteries on board, but No leaks visible!

I've got a couple of ideas for how to set things up.

There's plenty room at the sides for the arms that came with the tillers, but not quite enough at the stern. I can trim them a bit if necessary, but I don't think they'll need a full 180 degrees of movement to provide decent steering so it might well be OK as is.

As for the servos, I've got a couple of ideas to try.

My initial plan is to use the arms aligned as they are in the picture and connect each outer tiller arm to the corresponding outer arm on a single servo sitting on the keel.

If that doesn't work, I'll try something that is probably more standard - using an 'L' shaped arm on one of the tillers, connecting the tiller arms aligned with the keel together and connecting the other leg of the 'L' arm to a single servo.

I got a pair of 40mm x 26mm brass rudders from Cornwall Model Boats a couple of weeks ago, but after spending so long planking the hull I didn't want to rush into drilling holes in it.

The threaded tubes for the rudders were 8mm diameter, which was a bit close to the width of the hull bracing planks for my liking. To make sure I didn't destroy the planks when drilling I added some extra bracing along the sides, along with another plank to give enough depth for the threads to tighten.

I also added a couple of spring strut end joints connected by a length of M8 Rod mounted to the keel. The idea is that this will keep the rudders aligned and reduce the stress on the hull when they are pushed and pulled by the servo - probably total overkill, but I'm happy with it.

No actual progress on the boat itself this week, but I made a stand for the hull to enable me to take it off the build jig for the first time.

It turns out that Hobby Craft sell a plywood box which is just the right size to sit between bulkheads 2 and 4 on the plan. All I had to do was remove the lid and trace and cut out the bulkhead shapes from the ends of the box.

I used deep mahogany wood stain to make it look a bit nicer and some red self adhesive felt (also from Hobby Craft) to protect the hull from scratches.

Some small bits and bobs of progress this week.

I added stern numbers and porthole frames, then some gloss varnish over the entire hull.

Next, I completed the first bit of superstructure - the hatch cover between the main cabin and the raised engine room deckhead. The hatch will be removable on the model to maximise access to the hull space.

The hatch is made from 1.5mm ply with 1/8" x 1/16" edging and 1/2" square balsa underneath to keep the ply flat. The scuttle and inspection hatches are from Mac's mouldings.
I used Humbrol acrylic no 127 as the main grey colour with a Windsor & Newton burnt umber wash to pick out the details and add some dirt.

Painting the hull before fitting the running gear probably isn't the usual order, but I'm still researching brushless motors, propellers and all that side of things so I decided to just keep going. I'll have to fix up some of the hull paint once I add those things, but I think (hope) that it will work out ok.

I started off using crimson acrylic paint from Windsor and Newton because I had some. I found that it was slightly transparent, so switched to deep cadmium red instead, which worked much better. The upper hull was painted using mars black, also from Windsor and Newton.

Next up I used some 3mm water line vinyl tape (car trim) from Amazon.

The roundel and the number markings took some time. Initially I was looking for things that matched the plan, but noticed that the photos I have for 2757 have a later type roundel and numbering font.

I found a selection different sizes of the later type roundel without the yellow outline on the Castle Signs website.

I got the numbering from Vinyl Lettering Online, who supply custom lettering to your specific size, spacing and font on backing film - this makes it really easy to apply. I found that Open Sans Bold was a pretty good match for the numbering font shown in photos of 2757.

For the stern details I added a couple of 6mm eyelets as exhausts, then used 4mmx11mm staples and m1.2 washers to make the rungs of the ladder (all from Amazon). Gluing the staples and washers in place was really fiddly.
I made the ladder protectors from one of the 1.5mmx6mm mahogany strips that I got to do the deck planking.

Slightly late in the day I found a picture of the stern of 2757 on the RAF Museum website.
This showed that the number and position of the exhausts on the plan was wrong, but I decided to ignore that since they were already glued on.
It also showed details of vertical rollers on the towing hawse fairlead (if that's what it's called) in the hull, which I made up using some old sprue and plasticard that I had lying around. This detail isn't on the plan at all, or at least I can't see it.

I still have some portholes to add and the stern number (another detail shown in my late photo find and not on the plan), but the paint and markings have made a huge difference to how the hull looks.

I've been working steadily on the second layer of planking for a while, but since none of it made much of a visual difference I didn't post an update until it was finished.

Before starting the second layer I added a layer of 20gsm lining silk that I found on amazon and two more coats of sanding sealer. I decided on silk rather than tissue as I thought it would give me a stronger hull in the end.

The second layer of planking went on a lot faster than the first as I could clamp more planks in one go, and was much easier to bend and trim given the 0.5mm thickness.

The chine rubbing strip went on this morning with the help of some sniper tape I found in a drawer, which did a nice job of holding things in place while the glue set.

A load of sanding, and the first coat of sanding sealer is also done.

There are still some lumps and bumps as you can see from the photographs, but the hull looks straight and pretty symmetrical (the photo makes things look warped, but that's my photography skills).

Overall I'm pretty pleased with it for a first attempt at planking.

The plans call for the lower section of the bow to be carved out of balsa.

I decided to use 1/2" balsa sheet cut roughly to size and laminated on installation.
I also made a conscious decision to add these after the first layer of planking to allow me to cover them over with the second layer so that the whole hull looks planked.

It looks pretty awful to start with when roughly shaped, but planes and sands down quite easily to something that looks much better.

Compared to planking the hull it didn't take very long, so I also added some wood filler to smooth out the lower hull and bits of bow that were looking a bit rough.

A final bit of sanding and the first coat of sanding sealer is also now on.

Life has gotten in the way a bit recently and hull planking is a slow process, but I've continued to plug away at the first layer of hull planking and finally finished on Friday night.

Using extra ribs but no stringers made more of a difference on the bottom and from certain angles things do look more lumpy than I'd like, but I'll probably be able to fix it up with some filler since this is just the first of two layers.

It's been a few weeks since I posted an update, but planking is slow and there just wasn't anything of interest to say.

At last the first layer of planks on the hull sides is complete.
I've also trimmed the planks and shaped the keel to the bulkhead levels to allow the bottom planks to be done next.

The bow area needed some experimentation to keep the planks clamped down, but other than that it was just a question of keeping going until it's done.
I continued with ribs rather than the stringers that other people have used, but overall I'm happy with the result so far.

As John mentioned in his comment on my previous post, planking the hull is a long process.
I've been doing a bit here and a bit there all week and still I'm not quite half way along the hull sides above the chine with the first layer.

I did remove the hull from the jig and reset it so that the keel is clear for planking but that still seems a long way off...

Hi John, Yes I'm finding the going slow. 6mm planks don't cover a hell of a lot!

I did think of doing stringers instead of ribs, but in the end went with ribs.
That could be a mistake, but if so it won't be my first and hopefully it won't be terminal.

This week I ordered some lime planks for the hull from Cornwall Model Boats - 6mmx1mm and 6mmx0.5mm.

I decided on lime because I read on another build blog somewhere that lime was very flexible, not too expensive and I didn't really care what the colour was because the hull will be painted anyway.
I decided to go with 1mm and 0.5mm thickness to allow for double planking and still come out with a hull that is roughly the same thickness of the 1/16" ply from the plan.

Initially I thought I could run the 1mm planks longitudinally along the hull, but that idea didn't survive a dry fitting attempt, so I fell back to something at roughly 45 degrees. It also became clear after placing a few planks that just using the bulkheads wouldn't be enough so I started to add an extra vertical rib in between the bulkheads for extra support.

I was also toying with the idea of getting some planking clamps that I'd seen on Amazon. I forgot to order them by the time the planks arrived though, and after a bit of experimentation I found that crocodile clips with a paper clip inserted into the back do the job pretty well.

The last picture is one side of this weekends progress so I could be at this for a while. I think I'll be able to go a bit quicker now I've worked out the clamping, ribs and glue setting time, but I'm in no real rush.

It's a load of v-slot aluminium parts that I found on Amazon.
It seems to have worked pretty well so far, but if I were starting again I'd go for base plates with an odd number of slots to allow the jig to be more symmetrical.

With the 4 slot base that I used the keel is offset and the bulkhead supports aren't the same size, which makes things look a bit odd even when they aren't.

This weekend I planed and sanded the chine and inwale laminations down to the shapes of the bulkheads ready for the hull skin to be added.

Since the bulkheads in the semi kit have the more accurate curved shapes from the plan I'm going to try planking rather than shape ply sheet to composite curves.
To make that a little easier I added more formers at the bow ahead of bulkhead 1 at the level of the chine line.

My current plan is to add the hull skin over the former before adding the solid bow block from the plan. Hopefully that will mean I'll know the exact shape required for the block.

The inwales are made from 3 1/8"x1/4" strips laminated together.
Unlike the chines they run the full length of the boat.

The bow sections involve much more curvature than the chines did, so I soaked each strip in boiling water before bending - this seemed to work, as none of them broke.

The bow former allowed each strip to be clamped to what I hope will be a symmetrical curve.

The next stage will be to trim the chines and inwales back to the bulkhead shapes.

The keel from the Sarik semi kit stops at the level of the chines near the bow so some work is required to build it up to full height. The plan is a bit hazy on exactly what the full height is (which may be why Sarik stopped short). I've tried to make it level with the inwales at bulkhead No1.

I also decided to make a former for the curve of the inwales between the bow and bulkhead No1 to increase the chances of getting something symmetrical.

For both of these tasks I scanned parts of the plan and imported them into Adobe Illustrator to get something that could be scaled and printed accurately.
Once printed I stuck the shapes onto some 1/8" ply, cut them out and then glued them in place.

The chines are made from 3 laminated 1/4"x1/8" strips on each side.
I added one layer at a time over three days, using lots of 1" bulldog clips to clamp everything down.

The strips between bulkheads 1 & 2 are bent inwards and upwards. This was my first go at plank bending and I improvised a tool out of some pulley wheels mounted to some V slot aluminium to try and get something consistent.

Bending the height of the strips distorted them slightly, but I don't think that will matter in the end since they will have to be carved down to the bulkheads later anyway.

A relatively easy job today.

I added the 1/8" carlings that join all the bulkheads together at deck level and the engine room sides that are located immediately inboard of the carlings between bulkheads 4 & 5.

I didn't do this one yesterday because it isn't perpendicular to the waterline (and therefore the other bulkheads) and also didn't fit without some modification.
A few more Amazon purchases to get moveable extrusion joints and much fiddling later and it is in place.

In addition to getting the fixing angle right, it took longer because despite both the bulkhead and keel being laser cut items from the Sarik short kit they don't fit together.

The bulkhead comes with a 1/8" keel slot, but the keel is 3/8" wide at that point, despite being 1/4" narrower than the keel design on the plan.
It looks like the central 1/8" keel section is the only one that should be full length, to give a 1/8" tab for the bulkhead, but all 3 laser cut keel parts are identical in the kit.

I guess if I'd noticed before laminating the keel sections I could have done something about it. I didn't though, so had to widen the keel slot in the bulkhead instead.

I also found that the deck height was too low when dry fitting, which prompted much height, level and angle measuring.

Oddly, the bulkhead is exactly the same size as the one in the plan and the angle I had was also pretty much spot on - it just sat noticeably low on the keel compared to the deck level of the other bulkheads, which isn't the way it looks on the plan.

I eventually decided to add 1/8" shim to the slot in the bulkhead to raise it up to approximately the same height as the other bulkheads. The slots for the chine also line up reasonably well visually with the shim in place, so hopefully it was the right thing to do.

Added bulkheads 1, 4 & 5 today.
I cutout the centres of 4 and 5 before attaching them to the keel using a circular saw blade on the flexible attachment to my mini table saw - not a bad result for my first time using it.

I'm probably going to try for a sailing version, so you're right I'll have to put some holes in the bulkheads at some point.

I'm planning on putting some holes in the no 4 & 5 bulkheads before assembly, but tbh I just wasn't sure what I'd need for the forward ones, so I just left them for now.

That could turn out to be a huge mistake, but it'll be a learning experience if nothing else.

Even though the bulkheads came laser cut in the wood pack, I wasn't too sure about the positioning of the front No1 bulkhead, so started with No2 & 3 instead.

It took a while to work out how to use some v slot aluminium to make a framework that would keep the bulkheads vertical and perpendicular to the keel, but I think I found something that works.

The keel came laser cut with the Sarik Hobbies wood pack, along with some 1/8" square strips and 1/8" ply planks to be glued on either side.

Looking at the plan and laser cut bulkheads, the 1/8" planks should have been 1/4", so I've added a couple more 1/8" ply planks to the rear of the keel to make it the right size.

I got some V slot aluminium extrusion from Amazon to use as a jig for building the hull on. I've no idea how well this will work, but time will tell...