But since we know all planes are capable of well over 60mph,
given a dedicated enough modeler and an adequate supply of G rocket motors,
or even simply putting a 300w brushless 7x6 on a SlowStick/FFF,
we do need to be able to see if the plane that came from the factory with a 'PPP OK' sticker is still going under 60mph when they swap out the stock 50w for a 300w.

Before the CandyStripers put insane motors in their mopars, the street legal cars didnt lift the front wheels up in the air when you put the hammer down. Before the 3d Parkies put 300w brushless in their GWS Warbirds, the planes didnt hover... and swapping the prop to a cut 6x8 will have the slowfliers approach mach

Sure the box has a PPP OK sticker, but the factory motor is still in that box with the sticker.
The question is not whether that plane was OK from the factory,
the question is whether that plane is ok as it is currently setup.

Muncie may say the clubs dont have to worry enforcing the rules, but we all know they do.
Otherwise we can just eliminate the position of Safety Officer from all clubs, since we will be having selective enforcement of some rules but not others.

The planes DO need to be weighed, and they DO need to have speed limits ( Incapabilities ) verified.
This thread has brought up a few good (& otherwise) methods so far.

Pitot System measures airspeed not groundspeed.
WallyRadar seems good so far.
Pylon Timing doesnt work in 15mph wind, when a Tigermoth can have negative groundspeed in foward flight.
Doppler Analysis has potential for AMA web use, but also has abuse potential.
But for fun we'll all be getting Paintball guns & thumping the 88fps "PPP Balls Of Safety"


<edit: Corection -
A member of my crack staff of fact checkers just gave me a correction to make,
Or, more accurately, a guy on the boards saw me swing & miss,
The CandyStripers ran in a stock class.
<->
I guess it was Mopar themselves that felt the Hemi needed to be in those cars. Works for me[sm=thumbup.gif]
Perhaps I should have stuck with the V8 Vega example I used elsewhere.