500 km Triangle at 306 km/hr in Argentina

On Fri, 29 Dec 2006 08:18:52 -0600, "SAM 303a"
brentDAHTsullivanATgmailDAHTcom wrote:

To average 306 he certainly exceeded that speed for much of the flight.
I too would like to understand the mods and the risk analysis for this
flight.

Klaus if flying a company-modified Nimbus 4 DM which allows a Vne of
260 km/h IAS at 6.000 meters.

260 kp/h IAS at 6.000m = 350 kp/h TAS.





Bye
Andreas

Cool.
He probably bumped that limit a few times too, but I suppose that's what
limits and record-setting flights are all about.

"Andreas Maurer" wrote in message
...
On Fri, 29 Dec 2006 08:18:52 -0600, "SAM 303a"
brentDAHTsullivanATgmailDAHTcom wrote:

To average 306 he certainly exceeded that speed for much of the flight.
I too would like to understand the mods and the risk analysis for this
flight.

Klaus if flying a company-modified Nimbus 4 DM which allows a Vne of
260 km/h IAS at 6.000 meters.

260 kp/h IAS at 6.000m = 350 kp/h TAS.





Bye
Andreas

Andreas Maurer schreef:

On Fri, 29 Dec 2006 08:18:52 -0600, "SAM 303a"
brentDAHTsullivanATgmailDAHTcom wrote:

To average 306 he certainly exceeded that speed for much of the flight.
I too would like to understand the mods and the risk analysis for this
flight.

Klaus if flying a company-modified Nimbus 4 DM which allows a Vne of
260 km/h IAS at 6.000 meters.

260 kp/h IAS at 6.000m = 350 kp/h TAS.





Bye
Andreas

Can you explain which mods have been done? Shortened wingtips and
strengthened tail boom?

On 23 Dec 2006 06:54:01 GMT, Soarin Again
wrote:


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?


Exceeding the standard Vne was not necesary for this record flight.


I don't have the POH of the Nimbus at hand, but the DG-1000 numbers
are this:

http://dg-flugzeugbau.de/Handbuecher/flugh-1000s-d.pdf page 2.3

Vne (IAS) at sea level: 270 kp/h
Vne (IAS) at 8.000m: 205 kp/h IAS = 317 kp/h TAS

TAS calculator he http://www.flightplan.za.net/trueAirspeed.php

Given the 15 kp/h higher Vne of the Numbus 4D and a similar
Vne/altutude calculation scheme I expect a maximum legal TAS of about
325 kp/h at 8.000 m.





Bye
Andreas

Has this flight been posted anywhere? I did not find it on OLC.

Tim

On Dec 22, 7:57 pm, "Paul Remde" wrote:
"Today, Dec 22nd 2006 at 1:00 AM UTC, Klaus Ohlmann called me on the phone
just after landing to let me know he have made a 500 Km flight at 306 km/h
on average in a Nimbus 4DM... this could be the first above 300 km/h and for
far, the fastest glider flight made under FAI rules."

So I was poking around on OLC and found a number his flights. On Dec
22, he did fly, but it was a 1000 km triangle attempt that he
abandoned. Was the flight on a nother day? I found his other two
claimed flights as reported by the FAI below.

Congratulations!

FAI has received the following Class D (Gliders) record claims :

================================================== ==================

Claim number : 14380

Sub-class DO (Open Class Gliders)
General Category

Type of record : Speed over a triangular course of 100 km
Course/location : Zapala (Argentina)

Performance : 289.7 km/h
Pilot : Klaus OHLMANN (Germany)

Crew : FECHINO Esteban (Argentine)
Glider : Schempp-Hirth Nimbus 4 DM

Date: 18.12.2006
Current record : 249.09 km/h (01.12.2003 - Horacio MIRANDA, Argentina)

================================================== ==================

Claim number : 14381

Sub-class DO (Open Class Gliders)
General Category

Type of record : Speed over an out-and-return course of 500 km
Course/location : Zapala (Argentina)

Performance : 275.8 km/h
Pilot : Klaus OHLMANN (Germany)

Crew : JANSEN David (Australia)
Glider : Schempp-Hirth Nimbus 4 DM

Date: 16.12.2006
Current record : 247.49 km/h (03.03.1999 - James M. PAYNE, USA)

================================================== ==================
-Tom