This is a video shot by a friend of mine who is building a Stewart S51D Mustang, a 70% scale, V8 powered, allmetal replica of the P51 Mustang. Since S51 videos are extremely sparse on YouTube I wanted to post this for Mustang enthusiasts everywhere.

The prototype S51D had inner gear doors that proved to be troublesome enough that my friend decided to redesign them, particularly the door sequencing requirements. As a highly experienced A&P and mechanical "Concept Engineer" (you tell him what you want built and what parameters he has to work with and he designs it in SolidWorks and turns it over to the fabricators for prototype verification) he is eminently qualified to do the modification. His redesign was sold to quite a few other S51 builders. The completed inner gear doors (with inner skins) are shown at the end of the video.

This was shot approximately 10 yrs ago and the company info at the end is his engineering company. BTW, for those who are interested, the current S51 kit company owner has been feverishly working for the last several years to bring the kit back into production with plans to have a full booth / presence at AirVenture 2019. Here is the current company website. Notice the company updates. Enjoy!