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Does anybody know, how the Vario instruments of Wolfgang's Libelle should behave ?
It seems as if TEK compensation is not effective.
Cheers,
Peter
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Libelle Vario
Started by Peter Lürkens, Mar 24 2006 18:24
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This topic is closed
6 replies to this topic
#1
Peter Lürkens
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Posted 24 March 2006 - 18:24
Peter (Funky) Lürkens
#2
Norby
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Posted 24 March 2006 - 19:30
You are right Peter, the built in vario is not compensated. I personally made some changes to my own private Libelle to accomodate a modern vario, GPS and L-Nav from Max_R (Famous handcrafter in the Netherland) 
#3
Andy Souter
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Posted 24 March 2006 - 21:06
Snap! I did the same.
Soar 1248, Condor E20
#4
Peter Lürkens
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Posted 25 March 2006 - 04:42
Thanks for the hints, guys.
Thought already, that something went wrong during installation, that instruments of variuous planes were mixed up. BTW I made a new Libelle polar for GPS_Nav, based on Winpilot coefficients. The originals set was pretty far off. The new seems to fit pretty well with the Wolfgang's airfile.
Libelle_H201_Std -0.0001743 0.0230515 -1.3854643 302.0 10.7 34.6@ 89.0
Cheers,
Peter
Thought already, that something went wrong during installation, that instruments of variuous planes were mixed up. BTW I made a new Libelle polar for GPS_Nav, based on Winpilot coefficients. The originals set was pretty far off. The new seems to fit pretty well with the Wolfgang's airfile.
Libelle_H201_Std -0.0001743 0.0230515 -1.3854643 302.0 10.7 34.6@ 89.0
Cheers,
Peter
Peter (Funky) Lürkens
#5
hiNRG
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Posted 25 March 2006 - 05:37
Hi Peter,
Have you seen this polar from Wolfgang for the Libelle wet ?
Libelle_H201_WP_wet,-.00016143, .0227,-1.41285714,350,9.8,35.3,80
It was included with the, I think, most recent release of his polarcalc program.
cheers
andrew
Have you seen this polar from Wolfgang for the Libelle wet ?
Libelle_H201_WP_wet,-.00016143, .0227,-1.41285714,350,9.8,35.3,80
It was included with the, I think, most recent release of his polarcalc program.
cheers
andrew
#6
Peter Lürkens
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Posted 25 March 2006 - 06:58
Hi Andrew,
I didn't look into that. What I refer to as "original" was the set that came with the flight viewer.
I made a tiny spreadsheet, for the 3-point method. However the method is rather sensitive to "measurement"-errors during determination of the three points. A better method is using a range of points and finding the "best fit".
The indication of 80 km/h for the best glide appears to be a too low, in particular when wet. But I don't believe that LNAV does anything with it.
Calculating the polar with your first three coefficients yields L/D 36.9 @ 93.6 km/h which could be a realistic value.
Cheers, Peter
I didn't look into that. What I refer to as "original" was the set that came with the flight viewer.
I made a tiny spreadsheet, for the 3-point method. However the method is rather sensitive to "measurement"-errors during determination of the three points. A better method is using a range of points and finding the "best fit".
The indication of 80 km/h for the best glide appears to be a too low, in particular when wet. But I don't believe that LNAV does anything with it.
Calculating the polar with your first three coefficients yields L/D 36.9 @ 93.6 km/h which could be a realistic value.
Cheers, Peter
Peter (Funky) Lürkens
#7
hiNRG
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Posted 28 March 2006 - 05:11
Hi Peter,
Thanks for that.
I'll change mine and try to ascertain whether or not, it does make any difference.
cheers
andrew
Thanks for that.
I'll change mine and try to ascertain whether or not, it does make any difference.
cheers
andrew
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