Search results for query: *

When I was in A&P school, back in the late 70's, and we talked about airworthiness the instructors told us that the FAA had never defined it. The word airworthiness has always been used in the recommended log sign off for an annual though. Over the years I kept an eye out for a definition and...

I believe the flying club I'm in has 2 Cessna 172s equipped with single GNS650s and they are fully IFR capable. Why would you need 2 GPS sources? In any case, also try the Avionics forum in Pilots of America.com. No doubt somebody has already addressed what it is you are trying to do. My...

There are no age limits for the pilots license but you do need to be able to get a medical. There are Class 1 2 & 3 medicals depending on the type of operations you fly. Now there is also basic med option which I would guess is roughly equivalent to a Class 3. My posts reflect my personal...

I've watched how a lot of the MIL specs I was familiar with become SAE specs. It's good someone is maintaining them. Has anything come along to serve the role of the Qualified Product Listings the military used to produce? My posts reflect my personal views and are not in any way endorsed or...

This material has been around for a very long time. For the typical 43-13 user it's already core knowledge. The FAA also has a downloadable 115 page Weight & Balance Handbook (FAA-H-8083-1.pdf)too. Every licensed aircraft mechanic is trained on this and probably tested in written, oral and...

One of my coworkers told me that when he was a younger guy he was assigned to a work detail to build up a couple J58 engines for the SR 71 program. He said, he was told back then that you could see the turbine through the engine case when it ran in the test cell and that he was amazed when he...

I work in an airline Engineering Support Group that supports the aircraft maintenance division. One of our chronic problems involves troubleshooting the electrical system on older 3 engine aircraft. When an aircraft has an odd number of engine driven generators or just a lot of them (as in...

I don't think it makes sense to take a one size fits all approach to aviation. Theres the physics, theres the operating environment technical and business wise. The processes are probably different because when you do something to one airplane operated for a specific purpose in a specific well...

I don't have any recent first hand experience with this. In the 80's when I was an airline technical writer, we used to talk about ATA spec 100. I think today its going to be IAW with something like iSpec 2200. -> https://publications.airlines.org/CommerceProductDetail.aspx?Product=313 My...

I don't know how it's described in drafting terms but with airplane propellers a 36" pitch is how far the propeller would travel forward in one full revolution in an incompressible fluid. I believe this factors in the twist of the blade which I assume keeps the aerodynamic load on the blade...

Looking for a group oriented around post retirement topics. Specifically looking for an Excel model to predict income & taxes with SS and 401k. My posts reflect my personal views and are not in any way endorsed or approved by any organization I'm professionally affiliated with.

This is kind of an interesting topic. I see it on two different levels. At one level, I have a buddy building an experimental Zenith 750 STOL that seats 3. It's a really nice sheet metal CNC cut kit. The CG envelope is already laid out in the documentation and the location of a lot of the...

I believe current practices for industrial production of hydrogen involve cooking methane which is not really a green process. Maybe solar farms could do water electrolysis on a large enough scale to be cost effect but, that's not how it's done now. I've read there are some industries that...

The current US regulations for VFR fuel reserves require enough fuel to land with 30 min of reserve fuel onboard. IFR operations must be able to land with 45. IFR aircraft may have to fly to an alternate field owing to weather below minimums for a second approach though. So, that means enough...

In Commercial Part 121 airline work, I generally see Wiring Diagrams and System Schematics, the purpose of each is defined by some evolution of ATA manual specifications. Wiring diagrams along with equipment lists and and standard wiring practices manuals provide all the information necessary...

I've seen 3 phase, 115V, 400hz, aircraft transformer rectifiers with both a delta and a wye secondary that have a six diode bridge on each. I can't share the schematic though. My posts reflect my personal views and are not in any way endorsed or approved by any organization I'm...

The quantity of data streaming from an particular airplane, above what it required by the operational rules for the airspace they fly in, is really going to be determined by how much money the operator wants to spend. I have the video below book marked as a teaser for interns visiting our...

There are other battery connect disconnect systems, such as those use on aircraft. For those to work, you would need a battery set up with that type of connector. This might be worth it if you expect to regularly disconnect and reconnect the battery. They are designed for it. See ->...

Easy to find specs and data. Just have to ensure ok for the operating environment. First hit See -> https://www.ask-power.com/blog/bid/331178/mil-spec-terminal-and-splice-standards-mil-t-7928g-ms20659 My posts reflect my personal views and are not in any way endorsed or approved by any...

I don't know much about the aviation CAN bus, but if it's anything like the 429 bus, make sure all the intended LRU's are connected when you make your measurements. Long wire runs, if left unterminated at one of the equipment trays, can add a capacitive load that distorts the signal wave forms...