RSM P51d build

I have had this build "on the go" since August and first mentioned it when I used a profile sanding block.

https://www.coxengineforum.com/t7104-leading-edge-profile-sander

I have kept a track of it and noted some of the issues I had (all minor). The first thing to note is that the materials are excellent but I had trouble following the instructions. Like most kits, I have come to the conclusion that they are often written in hindsight by skilled builders (or designers) and a degree of knowledge or aptitude is often assumed.

Pictures are worth a thousand words!

The wings were an easy build until it came to the tips. The kit was supplied with adjustable lead out. It was rectangular in shape but only just larger than the slot cut in the ribs. So I shaved off a smidgen along the length and rounded the edges.



This enabled it to fit neatly into the rib.





There was also a wing tip weight box



I didn't want it proud of the wing surface and so I trimmed it to fit the rib shape. Should allow me to cover the wing neatly just leaving the lid (I also curved the edge of this)

The bellcrank fitted neatly



Webbing and sheeting




Then I came to another tricky bit. The wing tips - all ready cut and lightened - How can you place these centrally without interfering with the lead outs?

I decided to split it - the picture shows one original tip in the middle, the two outer ones split. Again the quality of the wood allowed me to do this with an xacto blade!




I then made an insert to widen it and used 1/64 ply to prevent the lead outs wearing the balsa. At this stage I also realised that the tip would bind the adjusting screw so I allowed a slot.



and made the other tip match. The wood split just as easily on the second tip. While probably not necessary - symmetry has an appeal.



The finished result





This was blended with the leading edge using the constructed sanding block



The finished wing awaiting ailerons




To be continued ....................