RC-FEIND, your comment got me thinking about the weight of the .40 LA. I will be on the upper end for weight but I will definitely be lighter than Daryl_y's Super Tigre powered Shrike. I was looking at how the .40 LA compares in weight to various engines so I figured I may as well make a list in case anyone else finds it interesting. Take a look...

O.S. .15 LA
6.5 oz w/muffler

O.S. .25 FX
10.8 oz w/muffler

Magnum .28
10.8 oz w/muffler

O.S. .40 LA
12.3 oz w/muffler

O.S. .32 FX
12.32 oz w/muffler

SuperTigre GS40
19.1oz w/muffler

I thought the comparison is kind of interesting. At only about 1.5 oz heavier than the .25 FX and about the same weight as the .32 FX, I think the .40 LA should do OK. It won't be the fastest Shrike around but the lightweight airframe should make this typically lackluster engine capable of some fun.

I have already had modifications to the design in mind with my Shrike 10. So far they include moving the firewall back around a half inch and of course, changing the wing spars for something stronger. I have a couple 1/4 inch carbon fiber tubes in my shop that I am going to look at using in place of the balsa spars. I haven't decided yet as I still need to compare the weight and amount of flex of the carbon tubes to spruce parts.

I also plan on a fairly light radio setup as well such as a light-weight receiver and mini servo on throttle.

Should be fun!

FlyerBry