0TreeLemur

Thanks Paul. It looks at this point that something will work out. -Fred

Thanks Vance. I'll try and firm something up late Monday afternoon.

Thanks. You are closest so far. I'll see who replies Monday and try to firm something up for mid to late week. -Fred

Thanks- I'll see what replies come in and try and firm up plans late Monday for later in the week. -Fred

I still have a plastic plate from 3rd grade in 1973 that preserves for all time my love of airplanes. On it is the best drawing I could muster of a 1958 Aero Commander 500 that my dad owned a share in. I got my license as soon as I turned 16. Top Gun made me consider Naval Aviation but my 20/25 vision ended that dream. Never thought I would own an airplane, but then I decided to quit being a professor, and got a real, paying job! Then I discovered Mooney. Livin' the dream now.

Hi everyone, I'm visiting my son in Fort Collins for a couple of weeks. My M20C is parked at GXY. Looking at the weather for the return trip to Alabama next weekend (May 9th or 10th) the models predict widespread cloudiness mid-route where I'll need a fuel stop. I lost IFR currency on May 1 and need to shoot a couple of practice approaches to regain currency. Anybody in the area willing to fly as safety pilot some evening this week? I'm fully vaccinated. Thanks, Fred

That was my assessment among others. Definitely a bit quieter. No speed difference in cruise. The Hartzell Top Prop on a C has no rpm limitations. Infinite ramp appeal when the engine is turned off! If my prop had had good blades, I'd have overhauled and installed a B hub. But, alas, my old prop had "undercut" blades, so OH with those blades was not an option. Good luck.

You're saying that instead of a giving MS participants easy access to non-controversial information, let's make them hunt for it or start a new thread. I don't get it.

BTW- there is no reason why this information can't be in a FAQ section if MS had one. There is nothing subjective or controversial about it.

Sorry to hear about problems. Sounds like an inventory control problem. I too have ordered frequently from them since becoming an owner in 2017. Ten orders in the past six weeks and over thirty in the past year. Items I've ordered in the last year include a Superior replacement cylinder for an O-360, OH vacuum pump, master solenoid, tubing, lots of screws, goops and potions. No problems. I appreciate the fact that they offer reasonable pricing on pieces-parts. Stuff I order mostly comes from the Eastern warehouse.

Yes sir. If only that capability existed.

Ordered.

Winner! Do you know, are these screws also the same as the ones that hold the dog house to the cylinders? My engine has a mix of different machine screws. That missing one that also holds the MAP line at Cyl #3 really bothered me.

The rocker cover machine screws on my O-360 loosen over time. Similarly, after recent annual I noticed that the screw in #3 cyl that retains the dog house and the MAP line had fallen out. The dog house wasn't removed at annual. Can some grade of loctite help with this?

This makes a lot of sense. I can easily see a situation where there were one or more vessels near the center of that fuzzy circle, and they were training or calibrating targeting systems. Thanks.

According to the link, they built 1500 of them at $1.4M a pop. I hope they are fielded and ready to take out $35k Toyota Hilux' trucks.

I asked my friend this question, who asked his wife, who asked her brother, who works for that company- Answer: surface-to-air combat exercise. That is one crazy-assed flight trace/profile. I guess when you are going 350 knots, your turning radius is big. Also, when you are on an island, you don't want to get too far from land.

Hi all, Maybe some current/former military aviation community can answer a question. A friend of mine knows a retired Naval aviator who flies for a private company that serves as an "aggressor" squadron for flight training exercises. While examining recent flights of one of their aircraft (Hawker Hunter mk.58, designed in 1958), I spied this crazy flight. How to spend 2 hours flying circles close to Oahu? Why would a 1958 design be used as an aggressor today? Why so many loops? Is that what a close-quarters dogfight looks like? The loops seem to "round"? Inquiring minds.... https://flightaware.com/live/flight/N327AX/history/20210414/2104Z/PHNG/PHNG

Yes, it does, but- In cruise the indicator vibrates at high frequency between 4-4.5", which is not in the green arc. Might just need a new gauge. My inner CB wanted to use an orphaned one.

Controlled, self propelled flight* of a heavier than atmosphere machine on another planet! Lasted 39 sec. See link from NASA! https://www.nasa.gov/press-release/nasa-s-ingenuity-mars-helicopter-succeeds-in-historic-first-flight *Note: flight requires the presence of aerodynamic lift created by the interaction of the shape of the craft and the free stream flow on a Free Body Diagram.

At runup today it showed in the green at 1700. Didn't note it exactly but between 4.5 and 5".

To recap, replaced vacuum pump at annual a couple of weeks ago, and the new vacuum pump failed to get the gauge in the green. Seemed odd because old vacuum pump ran right at 4.5" in cruise. Update: Comparing my vacuum gauge against another showed that one of them was wrong. One of my sons sent me a quality vacuum gauge. Comparing against it showed that my gauge was all fouled up. Luckily @Andy95W sent me a spare regulator an gauge from his aircraft. His gauge is good. Thanks Andy! Replaced the gauge, swapped Andy's newer looking regulator for my old-style (probably, maybe original) regulator and spent hours going over the vacuum system. Found a major leak. The hose connecting the regulator to the TC100 was off at the TC, explaining why my system was struggling to make 5". On the ground, the new vacuum gauge shows: RPM Vacuum (in Hg) 1160 3 1360 4 2400 5 I've not paid much attention to vacuum other than at higher rpm. Is this normal? Here's another puzzle... In flight at 2400 rpm, the vacuum gauge vibrates between 4" and 4.5". Numbers above verified after flight.

Yes, very true. The Prandtl optimal airfoil with minimum induced drag has no circulation at the tip, therefore ideally a symmetric airfoil that automagically maintains 0 AOA. Hence the need for a variable geometry airfoil near the tip- like a bird. A dynamic wing section. They left that part off our Mooneys!

Because lift is strongly a function of angle of attack, a transition to descent like a cruise descent (downward acceleration) can start with a decrease in alpha. If alpha=0 and lift=0 near the end of this wing at cruise, then in a transition to a cruise descent the wing tip creates negative lift, and could set up flutter or other ugliness depending on the structural characteristics of the wing. I could have been more specific.

Here's an English translation of the paper by Prandtl that the video presenter says motivated his thinking. I'm pretty sure that Prandtl was an alien. This paper is super cool. The simultaneous translation is really fun. The translation "tapered wing" is assumed to come from "spitzendigen Flügel" The trick here is that the outer bit (< 5%) the wing has 0 angle of attack (alpha) and therefore generates no lift. It kills the tip vortex much more effectively than any winglet. Of course running part of a wing at 0 alpha is muy peligroso. If a rigid airfoil and designed for 0 alpha in cruise, it would develop negative alpha in a descent. So, for any of this work, one needs a variable geometry wing, like a bird's wing. I'm going to leave this up for only a while. I could get my hand slapped for posting copyrighted material. I'm just sharing with a few "colleagues" in this thread. Enjoy. Fred Prandtl_Smallest_Induced_Drag_Via_Airfoil_1933(English).pdf