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Short Sunderland MkII


tomprobert

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  • 2 weeks later...

Morning all,

 

A little more progress to share on the Sunderland - I've been working on the engines of late which has not been the most fun (I hate engines and cockpits!) but I'm at a stage where they are ready for installation to the airframe.

 

Sunderland IIs were powered by the Bristol Pegasus, of which aftermarket options were very expensive and to fit four to model would have cost me nearly £100! Therefore I did originally plan to modify the Revell 1/32nd Hercules engines from a Beaufighter, but being two row seven cylinder engines, that was going to be quite a challenge.

 

With the Pegasus being a single row nine cylinder set up, a better starting point would have been a Wright Cyclone and thankfully a fellow forum member came to the rescue (thanks, Mark!) and sent me a set of his unused HK Models' B-17 engines. The reduction gear housing more closely resembles the Hercules set up, however, so I used the HK cylinders and the Revell Hercules reduction gear - not perfectly correct but close enough...

 

The Pegasus is actually, at least at first glance, a quite simple engine to replicate (used for illustration purposes only):

 

51419000806_ac62bd3a50_b.jpg

 

I won't have to worry about detailing the cylinder heads as these will all be hidden by the cowling, so it would just be a case of adding the single push-rods.

 

First up I sprayed the inside of the cowlings black and then I needed to check the cylinders fitted inside the cowlings properly - in the picture below you can see they sit quite happily in the correct position and actually needed no glue to hold them there. The reduction gear housing is just sitting on the cylinders to get the 'sit' of the engine correct in regard to clearance for the propeller:

 

51419260518_90b2d4ab27_b.jpg

 

I then painted the cylinders and reduction housing, and made the pushrods from Evergreen before adding and painting:

 

51419260523_1045fee902_b.jpg

 

A final test fit in the cowling - as you can see not much can actually be seen so the detail I've added is quite adequate:

 

51419000841_688b73331d_b.jpg

 

All four 'power eggs' are now complete, with the engines secured with Araldite Epoxy to ensure they don't fall into the nacelle:

 

51418259867_dd46af6eca_b.jpg

 

Next up will be installing these onto the wing... stay tuned.

 

All the best,

Tom

 

 

 

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19 hours ago, Anthony in NZ said:

Wonderful progress and thinking outside of the box.  Love the Sunderland, you know I am going to be insanely jealous of you when this is done!

Well I suggest you crack on and get your Brit Toom finished and order yourself a BIG Sunderland for your next project! ;)

 

I got the engines attached to the wings last night, so hopefully some pictures over the weekend - all being well.

 

Tom

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Evening boys and girls,

 

It's been a glorious sunny day here in my corner of Kent so I got the camera out and snapped some pictures of the recently installed engines.

 

With each 'power-egg' complete it was just a case of adding them to wing-section of each nacelle. The Revell Beaufighter cowl flaps were an absolutely perfect fit for the kit's forward firewall, so it was just a case of applying some Araldite to the inside surfaces of the cowl flaps and sliding them into place. The relatively slow drying time of the epoxy glue meant I had ample time to ensure each engine was aligned correctly, both with the plans and each other. When installing them, I didn't realise that the engines canted outboard at such an angle, but references confirmed this was the case. It certainly looks a little strange that the thrust line is so off central, and I presume there is a valid reason for it, too!

 

Anyway, on to the pictures...

 

As you can see the fit is nice and snug, and engine no.1 looks the part now it's hung on the wing. The early MkII-style straight exhausts will be made and added later:

 

DSC_0324

 

Engines 3 and 4 - lots of care was taken to align the engines carefully during installation:

 

DSC_0318

 

When I was hacking about with the kit-supplied nacelles I removed and kept the very crude carburettor intakes in the hope I could make something useable from them - as you can see from the three finished intakes at the top of the picture they scrubbed up fine:

 

51427105846_851642bd04_b.jpg

 

These were than glued in position on the lower section of each nacelle:

 

DSC_0330

 

She's really starting to take shape now:

 

DSC_0317

 

DSC_0327

 

Thanks for stopping by folks, and stay safe!

 

Until next time,

Tom

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