RRR48129 1/48 A20 Boston tropical cowls and exhaust stacks

Review by David Harvey

Review Type
Build review
$26.35 AUD from Red Roo (on sale at 29 May 2011)
Contents and Media:
2 x replacement cowls, 2 x outer engine nacelles (left and right) and 2 x exhaust stacks
Easy replacement to correct the incorrect cowls of the early version
None at this stage
Highly Recommended



The A20 Boston was used by the RAAF in many versions including the DB-7, A20-C and the A-20G. To model an early DB-7/A-20C in 1/48 you need to use the AMT/Italeri A-20B kit and convert it to the variant wanted. Part of the conversion needed is to modify the cowls and exhaust to reflect the tropicalised variant used by the RAAF. The AMT kit provides the later type cowl that is not representative of the earlier cowl and would take some modifying to get it correct. The modifications include such things as removing all the bumps off the rear edge of the cowl, making the exhaust pipe that comes out on the outer side of each nacelle and cutting the holes in the cowl to represent the 'tropicalised' version.

Whilst not a hard job to do the conversion, it would be outside the skills of some and to much work for others, luckily Red Roo Models come to the rescue with this conversion set. The conversion has been around for a number of years and I used one several years ago when doing a RAAF A-20C that I contributed to AMI.

The set

The set comes in the usual tan coloured resin and comprises six pieces:

  • 2 x modified cowls;
  • 2 x exhaust pipes; and
  • 2 x outer engine nacelles, one each for left and right engines.

The Red Roo version compared to the grey AMT original

The soft Red Roo interior compared to the AMT

The set is a straight change with the kit parts and do not require any modelling skills to make them fit. The most important thing to do when using thie set is to ensure that you wash them thoroughly due to the mould release agent used on the resin when casting them.

The components do need a bit of cleaning up due to the manufacturing process. The inside of the nacelles needs some work as the detail is soft and there are a few casting blemishes in them, luckily it is very hard to see inside once the model is completed. The exterior of the nacelles is good and the panel lines are the same depth as the kit.

The cowlings also require a small amount of cleaning up and there are one or two minute pin holes in the resin that I don't beleive will show up under paint. The exhausts are good.

A close up of the cowls when finished

The A-20C

The instructions

The instructions are very basic as befits a simple drop fit replacement set such as this. A single double sided sheet with the few points needed for fitting the parts and diagrams to ensure that the cowls are fitted the correct way.


Having used the set previously and having no problems I highly recommend it. The two main points to remember though, in line with all resin parts, is to wash them thoroughly and use superglue. I originally did not wash the parts thoroughly and then painted them with acylics then wondered why the paint came off when I took off the masking.


The following publications will help in the constuction of the A-20C:


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