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1/144 Airfix Hawker-Siddley Trident. HS ? DH !


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Venerable HS 121 Trident was conceived as DeHavilland 121 and therefore qualifies.

 

This is just an announcement, actual build will start once my 1/144 workbench, that is currently occupied with

 

1465130503_PICT0787.jpg

 

is cleared 

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Maintenance and parts manuals etc. for the 1C all had DH121 at the head of the pages on the microfilm packages. This was in place right to the last days of service of the 1C  ('RPH as I recall, which is/was preserved) in the 1980s. It therefore qualifies perfectly.

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13 minutes ago, Dave Swindell said:

True, but the exhaust nozzle/diffuser that Pin has highlighted was specifically designed for noise abatement.

Also true but it's not a 'hushkit' as we know it. The 1-11 had hushkits fitted later on late '70s, an obvious addition.

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7 minutes ago, viscount806x said:

Also true but it's not a 'hushkit' as we know it. The 1-11 had hushkits fitted later on late '70s, an obvious addition.

It may not be a term that you or I would use, I'd also generally use it to describe a retrofit solution as fitted to 1-11's, 737's etc.

However, it is a "bolt on" addition to an existing engine, and as such could legitimatley be described as a hush kit.

RR used similar devices on, for example, the Spey (Trident), Avon (Comet) and Conway (707). These engines, as I'm sure you are aware, were used on aircraft without this nozzle/diffuser fitted.

 

And to bring us back to Pin's question

On 24/02/2017 at 8:25 AM, Pin said:

Any ideas how to scatch build a hush kit? Seems bloody tricky in 1/144

I'd agree with you Pin, exceedingly tricky, and if you do succeed in fabricating one, also not very easy to replicate - moulding and casting would be complicated by the narrow ring surrounding the flutes at the rear of the nozzle/diffuser. I'll be watching closely to see how you get on!

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3 minutes ago, Dave Swindell said:

It may not be a term that you or I would use, I'd also generally use it to describe a retrofit solution as fitted to 1-11's, 737's etc.

However, it is a "bolt on" addition to an existing engine, and as such could legitimatley be described as a hush kit.

RR used similar devices on, for example, the Spey (Trident), Avon (Comet) and Conway (707). These engines, as I'm sure you are aware, were used on aircraft without this nozzle/diffuser fitted.

 

 

All fair comment Dave. My point was picking at the use of the terminology. They were always known as 'silencers' during my long association with the Tripod whereas the 1-11 definitely had 'hushkits' or, prior to modification, it was 'un hushkitted'. Just me being pedantic as usual but that's what being in the industry makes you unfortunately, scarred for life with it probably. It's like calling a desktop icon on Windows Version 1 an 'App' which it surely is in the scheme of things, but yet it isn't. Lets leave this one now and let Pin enjoy making his Hushkits/Silencers.

Nige B

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Overlayed known projections with a photo - the extent of the problem is clearly visible

FinOnly.thumb.jpg.71050a10049b9f714d94c44f90446602.jpg

Printed to scale

PICT1134.thumb.JPG.ae557aae6d17a26c3fcf185174ffe57a.JPG

As usual, I'm using a can to get straight, sharp edges. Some plastic, superglue and Mr.Surfacer 500 to the rescue

PICT1135.thumb.JPG.3eecda197d6a1d36d17d339b95aa3745.JPGPICT1136.thumb.JPG.bb542e43d1c7167797a2dbcf74713ab1.JPGPICT1137.thumb.JPG.cb632b2ec98b0e763958fd3b49458bf4.JPGPICT1138.thumb.JPG.0e5a998007b5f4d5ade0194b8e67c624.JPG

 

Half the job done, the other half is pending

PICT1139.thumb.JPG.d36d9ebb18abf823e71a8e2de499136e.JPG

But before joining the fuselage I need to rebuild the front leg well

 

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On 2/24/2017 at 0:25 AM, Pin said:

Any ideas how to scatch build a hush kit? Seems bloody tricky in 1/144

What about using the offcuts of that poor beer can to roll up exhausts and carefully press the flutes into the rear edge?

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Okay, work backwards. Glue a jig together consisting of slivers of rod cut at a shallow angle and glued onto a flat surface. Cut a strip of beer can and burnish it down on the angled slivers, and once you're happy with the shapes, then roll it up.

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Found another problem with the kit. The cylindric fuselage becomes a cone right before the engine #2 intake (blue arrow), there is a straight line instead of a curve (red arrows)

2116-03r-g-arpo.thumb.jpg.fecbb11c5f89ed4cc87a5c04c9524c1b.jpg

I tried as I could to get it fixed

before PICT1151.thumb.JPG.015ec15a6e89079280e57c3c4db7aaa0.JPG after PICT1169.thumb.JPG.342050303df0aee9bc90d95c13067842.JPG

 

Fairings

PICT1167.thumb.JPG.be461813c162db393ffb12b1e8bc8bdd.JPGPICT1168.thumb.JPG.05da255d58a2b6711add347096b732e5.JPG

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  • 2 weeks later...

Great work on this one so far Alexey. I hope you are able to solve the shape issues in the rear fuselage to your satisfaction.

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