Orval Fairbairn wrote in
news
In article ,
Bertie the Bunyip wrote:


Bertie

I tried that on my Johnson Rocket and got it to indicate 200 MPH in
level flight! Of course, it stalled at 100 instead of 60. ;)

All it is is an O-ring or something similar placed ahead of the
static pickup in the pitot/static system. This works only on planes
that have
a
combined pitot/static head, not on those that have the
flush-mounted static port on the side f the fuselage.



Ah, OK, you mean the ones with two tubes, right?

It doesn't matter -- all you have to do is be able to erect an airflow
fence ahead of the static pickup. This is one of the oldest tricks in
aviation -- dating back to at least the Thirties. It enabled salesmen
to sell a lot of "fast" airplanes!


Heh! Yeah, I think I've flown a few of those! I've certainly lown a few
where th eASI was next to useless, anyway.

Bertie