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DH Mosquito Mk.IV nacelle question
Topic Started: Apr 6 2018, 02:41 AM (201 Views)
jvenables
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Hawk
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I am hoping someone can set me straight here, as my Mosquito references are in storage about 8,000 kilometers away.

I have always been under the impression that the Mosquito Mk.IV had the short nacelles, ie. the rear of the nacelle ending just short of the wing training edge. But I recently noticed that the Tamiya kit of the B.Mk.IV/PR.Mk.IV has extended nacelles. I have read a few build reviews of the Tamiya kit and nobody mentions anything about the nacelles. A quick Google Image search suggests that some Mk.IVs had short nacelles and others had the longer style.

What's the story?
James from Brisbane, Australia
Now living in Laos

Nil illegitimi carborundum
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Graham Boak
Hero
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As a quick answer, only a small number of early Mosquitos had the short nacelle. I venture that these were the Mk.Is, which were mainly used on PR duties. If any Mk.IVs had the short nacelle they were very few. There was also a shorter-span tailplane on early aircraft. If you want a fuller answer then I can dig out more details, or perhaps someone else can add more, sooner.
Lancashire, UK
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peebeep
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Lots Of Trouble Usually Serious
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www.locate-and-cement.com
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Paul Brown, Chelmsford, UK Posted Image
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Mark Schynert
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Yeast
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The first time I saw a reference to this, the short nacelles were limited to the B.IV, Series 1 of ten airframes (plus the prototype). Probably Green's Famous Bombers of World War II #1. But I've since seen other references that suggest fewer B.IV Series 1 airframes than that, and some P.R. I as well. The simple answer is that the short nacelles were aerodynamically a problem, and they were extended almost immediately, so absent a photo that shows short nacelles for the prototype to be modeled, go with the long nacelles.

This sort of thing happened with a lot of types. The first ten or so B-25s had continuous dihedral from root to tip, but the rest flattened outboard of the nacelles, and there was a similar issue with Whitley Is, though I think the revision resulted in more dihedral, not less. The ventral strake didn't exist on the earliest ragwing Hurricanes--at least the recent Airfix kit gives alternative parts.
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jvenables
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Hawk
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Thanks all. Those responses answer the question very concisely.

James.

EDIT: Thanks for those diagrams Paul. You reminded me that I have a PDF copy of the Modeller's Datafile Mosquito book on a hard drive, so I'll go there later today and refresh my memory.
Edited by jvenables, Apr 8 2018, 02:00 AM.
James from Brisbane, Australia
Now living in Laos

Nil illegitimi carborundum
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