My Publications
Book entitled "A Directory of the Piasecki/Boeing-Vertol H-21 Helicopter"
![](https://amazon.clikpic.com/colinphoto/images/Front_cover_2_thumb.jpg "Book entitled "A Directory of the Piasecki/Boeing-Vertol H-21 Helicopter"")
A detailed individual directory of all known HRP-2, H-21 and Vertol Series 40 helicopters produced.
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Book entitled "History of the Birdlip Aeronautical Communication Complex (1940-2017), Revised Edition
![](https://amazon.clikpic.com/colinphoto/images/Front_Cover_-_Revised_Edition1_thumb.jpg "Book entitled "History of the Birdlip Aeronautical Communication Complex (1940-2017), Revised Edition")
Communications from the Cotswolds
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