500 km Triangle at 306 km/hr in Argentina

Soarin Again wrote:
At 05:42 23 December 2006, Js wrote:
306 km/hr = 190 mph = 165 knots

That is an amazing feat!


Does anyone know if his Nimbus 4DM has had special
modifications to increase the vne at altitude, or does
he just not care about operating limitations?

Soarin


When you are cruising at 20,000' to 30,000', doesn't the effect of
altitude cause IAS to be substantially less than ground speed?

Greg Arnold schrieb:

When you are cruising at 20,000' to 30,000', doesn't the effect of
altitude cause IAS to be substantially less than ground speed?

Vne goes with TAS, not IAS. But then, as it most probably was a wave
flight, there most probably was a wind.

Stefan wrote:
Greg Arnold schrieb:

When you are cruising at 20,000' to 30,000', doesn't the effect of
altitude cause IAS to be substantially less than ground speed?

Vne goes with TAS, not IAS. But then, as it most probably was a wave
flight, there most probably was a wind.

Yes, but in a closed course, the wind is a net loss, not a benefit.

Doug Haluza wrote:
Stefan wrote:

Greg Arnold schrieb:


When you are cruising at 20,000' to 30,000', doesn't the effect of
altitude cause IAS to be substantially less than ground speed?

Vne goes with TAS, not IAS. But then, as it most probably was a wave
flight, there most probably was a wind.


Yes, but in a closed course, the wind is a net loss, not a benefit.

That all depends on the profile of the wind. Different speed and direction at
different altitudes can no doubt be a benefit.

Greg Arnold wrote:

When you are cruising at 20,000' to 30,000', doesn't the effect of
altitude cause IAS to be substantially less than ground speed?

That is indeed true. However, there are aeroelastic concerns (such as
flutter) which may result in a lower indicated vne at high altitude.

Charles

"Charles Crosby" wrote in message
...
Greg Arnold wrote:

When you are cruising at 20,000' to 30,000', doesn't the effect of
altitude cause IAS to be substantially less than ground speed?

That is indeed true. However, there are aeroelastic concerns (such as
flutter) which may result in a lower indicated vne at high altitude.

Charles



http://home.comcast.net/~johan.larso...ride-home.html

The Long Ride Home
Harold Peterson


This article originally appeared in the August 1, 1966 issue of Sports
Illustrated. David Stevenson provided the issue of SI for scanning.


' "We're plagued with people who want to emphasize the danger," George said.
"Just flying a sailplane around is safer than power flying. One fundamental
safety factor is the soft landing. You have marvelous control-anywhere
between a 40 degree approach with full dive breaks to 3 degrees with none.
In contest or record flight, of course, you're definitely stretching a
little. On a glide you may easily reach 150 mph where the placard speed is
listed at 86." Placard speed is that beyond which the manufacturer makes no
guarantee that things will not start coming off. '

[Quoting George Moffat. G.T.]


--
Geoff
The Sea Hawk at Wow Way d0t Com
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