Recent content by SamP

Thanks very much. this is me mostly just trying to understand airframe design. I understand that controllability and structural integrity can be the limiting factor to FWF. It didn’t make much sense to me that FWF just be a weight limit in the case for structural limit. Rather, as you suggest...

Thanks. I’ve had an opportunity to write Mark. He was kind enough to answer my questions, which I’m sure he’s been asked a million and one times before.

Thanks very much. Definitely something you wouldn’t want to do without significant analyses and thought. Looking at a Sonex B aeromomentum Am15 combination. Very cool engine, but mostly trying to understand aircraft design more. I also wondered about vibratory loads and whether that factors...

I’m trying to understand what drives the maximum firewall forward weight. Since the Engine is cantilevered, I am assuming that one component is simply the stress on the engine mount. If this is the case, then an airframe max g could be derated. Another factor is elevator control authority. This...

Thanks for everyone's input. My brain is slowly "grokking." Just trying to build the right model in my brain so all the factoids I pick up fit together. Interestingly, I learned as I read through materials that while differences in clearance may affect how much load a particular bolt takes...

That's awesome! At EAA20, there is a fairly robust, kid focused programming. EAA20 also just did first flight for the club built RV-12

Always enjoy seeing the statistics that Ron presents and the discussions afterwards

Thanks very much. It makes sense to me. At the microscopic level, where all the fun really happen, the lines on the extrusion would be much smoother than where a cut was made.

I was reading through the Zenith construction standards and there was a mention of the need to remove all cutting marks as they may be stress risers. That makes sense to me. I wouldn't consider extrusion surfaces to be smooth. They often have lines that show the direction of extrusion. Do these...

I've been told that not properly deburring can lead to decreased fatigue life in a bolt hole. I'm trying to go through the mental exercise of how burrs affect the fatigue life on a joint. Haven't found a good explanation yet on the internet. I understand how a crack that is cyclically loaded may...

There is also Open Flight Solutions as well. Has the Raspberry Pi based systems proven unreliable or are there other issues?

I saw this DIY Mode C transponder awhile back. Has anyone put it together? There probably are legal issues http://antena.fe.uni-lj.si/literatura/S53MV/avionics/avionics.html

Thanks for linking and the healthy discussion. My copy dated 2013 has a different value there. I wonder why they would increase it to what is beyond what people are typically doing and calculating

Thanks for all the tips. I wound up taking the grinder to the head. Behind it was a bracket that could be sacrificed. Fortunately I didn't scuff it up. I was torquing the nylock to ~42 in pounds, which is what the RV-12 Vans manual says for a AN3 nut with nylon insert (Yes, it seems higher...

Thanks, I'll try cocking the nut while trying to rotate it out. Hoping to not have to get the grinder out since it's in a tight location