Comments on: The Boeing/Stearman PT-17 Primary Trainer of the Aces http://www.acmp.com/blog/the-boeingstearman-pt-17-primary-trainer-of-the-aces.html all about aviation! Tue, 06 Dec 2011 08:45:09 +0000 hourly 1 http://wordpress.org/?v=3.2.1 By: John M. Davis http://www.acmp.com/blog/the-boeingstearman-pt-17-primary-trainer-of-the-aces.html/comment-page-1#comment-17296 John M. Davis Thu, 11 Mar 2010 01:35:55 +0000 http://acmp.com/blog/?p=647#comment-17296 Norm: How often can incorrect information be published before everyone realises that the real story is not being told? If you take the Stearman (Boeing) Model 70, Model 73, Model 75, and Model 76, Boeing-Wichita records show that 8,584 aircraft of this model were built and delivered. The other 1,762 "airplanes" were a composite of all spare parts delivered to the purchasers of complete aircraft. I believe it was the MAA who worked on this concept, and it is possible to find other manufacturers who used the "spares" number to boost the production total. I have not been able to determine the exact method used for computing these numbers, but it was the weight of the spares - do not know if that included the engine or not. For arguments sake let us say it does, then Boeing delivered 1,762 x 1,936 lbs, or some 1,700 tons of spares. Thus, and we do not know, but this might have included 2,000 lower wings, 5,000 landing gear struts, etc etc. I am certain that one could have built a few more aircraft from those spares, but no-one knows how many. Please continue with your exzcellent articles John M Davis Wichita, KS Norm:

How often can incorrect information be published before everyone realises that the real story is not being told? If you take the Stearman (Boeing) Model 70, Model 73, Model 75, and Model 76, Boeing-Wichita records show that 8,584 aircraft of this model were built and delivered.

The other 1,762 “airplanes” were a composite of all spare parts delivered to the purchasers of complete aircraft. I believe it was the MAA who worked on this concept, and it is possible to find other manufacturers who used the “spares” number to boost the production total.

I have not been able to determine the exact method used for computing these numbers, but it was the weight of the spares – do not know if that included the engine or not. For arguments sake let us say it does, then Boeing delivered 1,762 x 1,936 lbs, or some 1,700 tons of spares. Thus, and we do not know, but this might have included 2,000 lower wings, 5,000 landing gear struts, etc etc. I am certain that one could have built a few more aircraft from those spares, but no-one knows how many.

Please continue with your exzcellent articles

John M Davis
Wichita, KS

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