VAF Forums - Knots or MPH?? That Is The Question

VAF Forums (https://vansairforce.net/community/index.php)

- RV General Discussion/News (https://vansairforce.net/community/forumdisplay.php?f=2)

- - Knots or MPH?? That Is The Question (https://vansairforce.net/community/showthread.php?t=81947)

Pythagorean Theorem

Quote:

Originally Posted by L.Adamson (Post 623112)

150agl(offset 350')= 500'. That's legal, isn't it?

Better brush up on the Pythagorean Theorem...A^2+B^2=C^2....the distance was only 380 feet.

Quote:

Originally Posted by Peterk (Post 623065)

Dan,

don't forget the GAPHO system!

04 gph = GAPHO 1...cocktail party bragging rights for RV-12 owners

14 gph = GAPHO 2...routine for the rest of you

lbs/hr = GAPHO 3...used by a small group of Rocketeers.

(just having fun of course...not necessary to brag about gph at stall speeds)

Pete

14 gph?... ..try 7 GPH at 160knots or 184mph..But thats really 7.5GPH when burning autofuel with 10% ethanol.

24.5 mpg..I can lve with that..:)

Frankh.RV-7a

....I Use Both! And must admit, I am most comfortable with MPH. I wish this were the standard for aircraft as that measure is what we are accustomed to using in this country. We will most likely soon be using whatever the Chinese mandate?:rolleyes: Since knots are considered the standard for aviation throughout the world, I find it odd that Vans, (being the only aircraft of any real importance) elected to publish all performance specifications and sales information in MPH exclusively. Few people that have RVs have their panel, GPS, airspeed indicator etc in MPH. Many RVers are low or no time pilots and are most accustomed to using MPH. Perhaps that is the rationale for Vans decision. Or could it be when glancing at the airspeed indicator (as knots look lower than MPH) you are less likely to scare the sh-t out of yourself when you hit a bump :eek: with our extremely low maneuvering speeds, or are approaching VNE with little room for error at cruise, and would like to begin a decent? Seems like it would make sense to have airspeed indicator match the specifications on the plane. Am I rambling again? Allan

Centuries ago (before airplanes) the men who guided ships on the water were called pilots. In fact Merriam Webster lists this as the first definition of pilot.

So if we are to avoid nautical terms what must we call ourselves if not pilots?:D:D:D

Quote:

Originally Posted by Geico266 (Post 622850)

Knots are for ships. No one cares how fast a ship goes. ;) No one (the general public) knows how fast a knot is so you have to sit there and explain it every time. This is a waste of time, spent only attempting to make the pilot feel superior over the person asking. (Right Marty!??;))

Think of how many time you have had to ask; "Knots or MPH" at OSH or any other time you are talking speed. Folks! We are talking about wasting time at OSH! There should be a law against that!

MPH is for airplanes. Most pilots uses statue miles to a destination when traveling they usually don't use nautical miles. There is that term again "nautical".... is for ships! Why confuse the issue?

I hereby declare MPH the official measure of speed for RV's. ;)

Quote:

Originally Posted by N395V (Post 623145)

So if we are to avoid nautical terms what must we call ourselves if not pilots?:D:D:D

Aviators!

;););)

Quote:

Originally Posted by skylor (Post 623139)

Better brush up on the Pythagorean Theorem...A^2+B^2=C^2....the distance was only 380 feet.

I must have flunked Trigonometry.....42 years ago...:(

Real pilots fly taildraggers.

Real aviators fly MPH

Quote:

Originally Posted by skylor (Post 623105)

I'm surprised you would post such a thing in a public forum, potentially monitored by the Feds.

I am guessing on all these numbers, there is a good chance that I was actually 250agl and 500' to the side. I've been known to embellish stories for dramatic effect. At no time was I ever pointed at anyone or even flew over them. It was sparse enough that if I had a different plane I would have cut the power and landed. Feel free to interview anyone who was on the lake that day, if anything I wasn't close enough for them to really enjoy them moment.

Switched my EFIS over to Knots today. One more nice thing about electronics. Not a big deal in the 9. I just went from 70MPH to 60 knots on final and from 60 MPH over the numbers to 50 knots.

Quote:

Originally Posted by N395V (Post 623145)

Aviators! ;)

Ships going into port still require pilots. They come out on small boats and board the ship, and take control of the docking of the ship with tugs and side thrusters....... and you guest it....... they use MPH inside the harbor. ( I have no idea if that last part is true, I am getting bored again. :D)