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Post  ian1954 on Tue Feb 25, 2020 1:16 pm

The fuselage is now under way.

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The engine bearers and ply doublers have been epoxied and the bearers have been trimmed to accept the PAW. The PAW has a fat arse and tiny mounting holes. I have made the mistake before of moving the bearers to fit but this creates problems because when you drill out the mounting holes in the bearers they are too close to the edge.

This leaves the captive nuts hanging over the edge. Not good!

I trim the bearers around the engine so that the mounting hole are drilled in the centre of the bearers.

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The fin and rudder have been prepared

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Post  getback on Wed Feb 26, 2020 8:21 am

Hello Ian ; Never used the pin hinges but have some i think , you make it look easy to install . Yes drill bits really tear up some balsa ! Where ur talking about realigning the U divider for the elv. is a real PTA for me to get straight ! your doing a good job of it though Looking:Thumbs UP: Good !
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Post  ian1954 on Sun Mar 01, 2020 8:39 am

There is always a stage in any build where I go astray and need to make a correction.

I already new that I would have to make a change as the plan showed the fitting of a 11/4" spinner. For some reason, these are not readily available in the UK while everyone stocks 11/2" spinners.

So I remade the nose rings and went about shaping the front end to the spinner. It looked really neat but ...............the intructions required offset for the engine by simply inserting washers under the front mounts.

I had done this but hadn't realised that when I tightened the engine down - those washers crushed through the ply doublers and so I had no offset!

Oh dear, how sad, well never mind! However, when I solved this with another couple of washers the crankshaft was now 1/4" off centre.

This had all been epoxied and would have been a mare to remove. So out came the grinder, more balsa and ply together with isopon filler.

Clouds of dust later

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Post  Kim on Sun Mar 01, 2020 8:46 am

Man, that looks really nice!
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Post  Cribbs74 on Sun Mar 01, 2020 9:20 am

Ian,

They make offset wedges at varying degrees that have a larger footprint than a couple of washers. I imagine with your skills you could easily make something.

Ron
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Post  ian1954 on Sun Mar 01, 2020 9:35 am

Thanks Kim.

That is a good idea Ron and I think I would take it further and remove the ply from around the mounting lugs before fitting the taper.

It has now been assembled for a dry fit.

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Not sure about the undercarriage - it looks flimsy

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It also seems large for 1/2A - I am glad I opted for the 1cc diesel.

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Now cogitating covering.
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Post  Cribbs74 on Sun Mar 01, 2020 10:04 am

The reason it’s so big is because it’s a full on stunt ship. Most 1/2A designs that stunt really well are on the larger side. That’s not true in all cases though.

Your engine choice is probably and excellent one. You want it to fly slower than usual and have lot’s of torque. That Diesel should fit the bill.

What engine did it call for in the plans?
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Post  ian1954 on Sun Mar 01, 2020 10:13 am

Cribbs74 wrote:The reason it’s so big is because it’s a full on stunt ship. Most 1/2A designs that stunt really well are on the larger side. That’s not true in all cases though.

Your engine choice is probably and excellent one. You want it to fly slower than usual and have lot’s of torque. That Diesel should fit the bill.

What engine did it call for in the plans?

Brodak 049 but the pictures in the instructions showed a Norvel/AMA 061
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Post  Cribbs74 on Sun Mar 01, 2020 10:20 am

Yeah, if it’s a Brodak kit it makes sense to push the Brodak .049.

Probably no mistake that they show the Norvel .061 in the pictures as it’s more suited to that.

That landing gear is a pretty common setup. For a CLPA plane it’s adequate for smooth controlled 3 point landings on concrete. I would imagine if you slammed it down in grass it would tear off.
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Post  ian1954 on Thu Mar 05, 2020 7:10 pm

I had a 5 metre roll of Oracover Easycote and so I thought I would try it on this model.

I can say that this covered the flaps, tailplane and fuselage with ease. I was very impressed with how easy it was - seams were barely visible.

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However, when it came to the wing .................. not impressed at all!!

The Easycote needs a temperature of 100 - 120 deg C to activate the adhesive  and 150 deg C to shrink tight.

What is not mentioned is that the  adhesive is also the covering colour and it comes off easily. You cannot tack and reposition the material easily. The colour remains stuck to the balsa and the clear material left does not reattach.

I got the covering stuck down on the wing but had difficulty stretching it around the wing tips, When it came to tautening the finish it stuck to the ribs and as it shrank the colouring scraped off.

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The tips ended up a mess and need recovering.

I cannot recommend Easycote for open bay wings.
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Post  944_Jim on Thu Mar 05, 2020 8:43 pm

Wowzers! I think I need one of these. That is one sweet build!
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Post  ian1954 on Mon Apr 27, 2020 4:35 pm

With lockdown, I switched to other projects - like tidying up and looking for those many bits and pieces that I had put in safe placs. Places so safe, I couldn't remember where they were.

This all started because I was about to make a tank for this and didn't have the right size tubing to hand. While looking for the tubing I came across sheets of tin that I use for tank building in three different boxes. I found various lengths and sizes of aluminium, brass and copper tubing in seven boxes. So I decided to have a sort out - this was the tip of the iceberg.

Anyway, I am still at it along with being reminded of the many "little" jobs I haven't finished off and sidetracked all over the place.

Still, the PAW 100 is almost "run in" now for this plane. I have to say though that this was/is the most finicky PAW engine I have ever experienced. From the get go it was a difficult starter and was not happy with my typical Sport diesel mix. I had to mix a much blander concoction.

Unusually, for a traditional iron piston diesel - it was tight wuith a degree of pinching. It has now had 50 minutes running in but still not ready even though fully heat cycled. This is it on a 7x4 prop.

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Post  ian1954 on Mon Apr 27, 2020 5:27 pm

I had a few problems with the undercarriage. The undercarriage wire was too thin for the wheels I had selected.

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So it was necessary to resort to tubing to fill the gap.

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Post  ian1954 on Mon Apr 27, 2020 5:33 pm

Similar problem with the supplied clip for the front undercarriage.

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Post  ian1954 on Mon Apr 27, 2020 5:37 pm

I also had to alter the position of the pushrod exit in the wing. I checked and double checked and had cut it out to plan but ...... back in with the knife.

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Post  roddie on Mon Apr 27, 2020 7:02 pm

Hi Ian, Glad to know that you are well. That diesel sounded good to me! Best of luck when building the fuel tank. Thumbs Up
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Post  ian1954 on Tue Apr 28, 2020 6:38 am

roddie wrote:Hi Ian, Glad to know that you are well. That diesel sounded good to me! Best of luck when building the fuel tank. Thumbs Up  

Hi Roddie,

Like most of us we are in lockdown but we are still allowed to take the doggies for a walk once a day maintaining social distancing. (the doggies ignore this and socialise freely with their friends!). Not allowed to fly though - it is not considered excercise by those who decide these things.

Most shops are closed (other than food) but I am still able to get non essential items (modelling!) by mail order - so that is situation normal.
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Post  akjgardner on Tue Apr 28, 2020 7:08 am

That Engine Run Sounded Really Good. The Plane is looking good too.
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Post  getback on Tue Apr 28, 2020 8:48 am

Ya got to hate it when stuff don't fit that should , But You do have a good remedy for that i see Very Happy I have to cut the push rod exit on most my builds . The Paw did sound good after getting her going one these days i will run a diesel and get that smell you always talk about . Glad to hear you guys are keeping it together during this Virus . I am lucky to have some land to get out on and roam bounce
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