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DHV Testreport LTF 2009

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Aircross U-Cross XL
Type designationAircross U-Cross XL
Type test reference noDHV GS-01-1982-12
Holder of certificationKontest GmbH - AirCross
ManufacturerKontest GmbH - AirCross
ClassificationC
Winch towingYes
Number of seats min / max1 / 1
AcceleratorYes
TrimmersNo
Aircross U-Cross XL
 Behaviour at min weight in flight (110kg)Behaviour at max weight in flight (130kg)
Test pilots
Harald Buntz
Harald Buntz
Reiner Brunn
Reiner Brunn
Inflation/take-offCC
Rising behaviourSmooth, easy and constant risingSmooth, easy and constant rising
Special take off technique requiredYesYes
 
LandingAA
Special landing technique requiredNoNo
 
Speeds in straight flightAA
Trim speed more than 30 km/hYesYes
Speed range using the controls larger than 10 km/hYesYes
Minimum speedLess than 25 km/hLess than 25 km/h
 
Control movementCC
Symmetric control pressureIncreasingIncreasing
Symmetric control travel50 cm to 65 cm50 cm to 65 cm
 
Pitch stability exiting accelerated flightAA
Dive forward angle on exitDive forward less than 30°Dive forward less than 30°
Collapse occursNoNo
 
Pitch stability operating controls during accelerated flightAA
Collapse occursNoNo
 
Roll stability and dampingAA
OscillationsReducingReducing
 
Stability in gentle spiralsAA
Tendency to return to straight flightSpontaneous exitSpontaneous exit
 
Behaviour in a steeply banked turnNote concerning spiral dives with paraglidersBB
Sink rate after two turnsMore than 14 m/sMore than 14 m/s
 
Symmetric front collapse BB
EntryRocking back less than 45°Rocking back less than 45°
RecoverySpontaneous in less than 3 sSpontaneous in less than 3 s
Dive forward angle on exitDive forward 30° to 60°Dive forward 30° to 60°
Change of courseKeeping courseKeeping course
Cascade occursNoNo
 
Symmetric front collapse in accelerated flightBB
EntryRocking back less than 45°Rocking back less than 45°
RecoverySpontaneous in less than 3 sSpontaneous in less than 3 s
Dive forward angle on exitDive forward 30° to 60°Dive forward 30° to 60°
Change of courseKeeping courseKeeping course
Cascade occursNoNo
 
Exiting deep stall (parachutal stall)AA
Deep stall achievedYesYes
RecoverySpontaneous in less than 3 sSpontaneous in less than 3 s
Dive forward angle on exitDive forward 0° to 30°Dive forward 0° to 30°
Change of courseChanging course less than 45°Changing course less than 45°
Cascade occursNoNo
 
High angle of attack recoveryAA
RecoverySpontaneous in less than 3 sSpontaneous in less than 3 s
Cascade occursNoNo
 
Recovery from a developed full stallAA
Dive forward angle on exitDive forward 0° to 30°Dive forward 0° to 30°
CollapseNo collapseNo collapse
Cascade occurs (other than collapses)NoNo
Rocking backLess than 45°Less than 45°
Line tensionMost lines tightMost lines tight
 
Asymmetric collapse 45-50%AA
Change of course until re-inflationLess than 90°Less than 90°
Maximum dive forward or roll angleDive or roll angle 15° to 45°Dive or roll angle 15° to 45°
Re-inflation behaviourSpontaneous re-inflationSpontaneous re-inflation
Total change of courseLess than 360°Less than 360°
Collapse on the opposite side occursNoNo
Twist occursNoNo
Cascade occursNoNo
 
Asymmetric collapse 70-75%CC
Change of course until re-inflation90° to 180°90° to 180°
Maximum dive forward or roll angleDive or roll angle 45° to 60°Dive or roll angle 45° to 60°
Re-inflation behaviourSpontaneous re-inflationSpontaneous re-inflation
Total change of courseLess than 360°Less than 360°
Collapse on the opposite side occursNoNo
Twist occursNoNo
Cascade occursNoNo
 
Asymmetric collapse 45-50% in accelerated flightAA
Change of course until re-inflationLess than 90°Less than 90°
Maximum dive forward or roll angleDive or roll angle 15° to 45°Dive or roll angle 15° to 45°
Re-inflation behaviourSpontaneous re-inflationSpontaneous re-inflation
Total change of courseLess than 360°Less than 360°
Collapse on the opposite side occursNoNo
Twist occursNoNo
Cascade occursNoNo
 
Asymmetric collapse 70-75% in accelerated flightCC
Change of course until re-inflation90° to 180°90° to 180°
Maximum dive forward or roll angleDive or roll angle 45° to 60°Dive or roll angle 45° to 60°
Re-inflation behaviourSpontaneous re-inflationSpontaneous re-inflation
Total change of courseLess than 360°Less than 360°
Collapse on the opposite side occursNoNo
Twist occursNoNo
Cascade occursNoNo
 
Directional control with a maintained asymmetric collapseAA
Able to keep courseYesYes
180° turn away from the collapsed side possible in 10 sYesYes
Amount of control range between turn and stall or spinMore than 50 % of the symmetric control travelMore than 50 % of the symmetric control travel
 
Trim speed spin tendencyAA
Spin occursNoNo
 
Low speed spin tendencyAA
Spin occursNoNo
 
Recovery from a developed spinAA
Spin rotation angle after releaseStops spinning in less than 90°Stops spinning in less than 90°
Cascade occursNoNo
 
B-line stallAA
Change of course before releaseChanging course less than 45°Changing course less than 45°
Behaviour before releaseRemains stable with straight spanRemains stable with straight span
RecoverySpontaneous in less than 3 sSpontaneous in less than 3 s
Dive forward angle on exitDive forward 0° to 30°Dive forward 0° to 30°
Cascade occursNoNo
 
Big earsAA
Entry procedureDedicated controlsDedicated controls
Behaviour during big earsStable flightStable flight
RecoverySpontaneous in less than 3 sSpontaneous in less than 3 s
Dive forward angle on exitDive forward 0° to 30°Dive forward 0° to 30°
 
Big ears in accelerated flightAA
Entry procedureDedicated controlsDedicated controls
Behaviour during big earsStable flightStable flight
RecoverySpontaneous in less than 3 sSpontaneous in less than 3 s
Dive forward angle on exitDive forward 0° to 30°Dive forward 0° to 30°
Behaviour immediately after releasing the accelerator while maintaining big earsStable flightStable flight
 
Behaviour exiting a steep spiralCC
Tendency to return to straight flightSpontaneous exitSpontaneous exit
Turn angle to recover normal flight720° to 1 080°, spontaneous recovery720° to 1 080°, spontaneous recovery
Sink rate when evaluating spiral stability [m/s]1414
 
Alternative means of directional controlAA
180° turn achievable in 20 sYesYes
Stall or spin occursNoNo
 
Any other flight procedure and/or configuration described in the user's manual
No other flight procedure or configuration described in the user's manual
   
Supplementary remarks  
 Testflugmanöver 1 Füllen/Starten: spezielle Starttechnik erforderlich, ansonsten bleibt Kappe hängen. Testflugmanöver 7 Rollstabilität und Rolldämpfung: sehr geringe Rolldämpfung. Testflugmanöver 22 Verhalten bei der Ausleitung von Steilspiralen: Je nach Manövereinleitung sehr schnelle Beschleunigung auf hohe Sinkgeschwindigkeiten größer 20 m/s, sehr hohe G Kräfte und stabile Spirale bereits bei 14 m/s möglich (Bei sehr schneller und verzögerungsfreier Einleitung). >> unbedingt Betriebsanleitung beachten !!! Für geübte Piloten ist die Sinkgeschwindigkeit angenehm dosierbar und leicht zu kontrollieren. Sehr direktes Handling.Testflugmanöver 1 Füllen/Starten: spezielle Starttechnik erforderlich, ansonsten bleibt Kappe hängen. Testflugmanöver 7 Rollstabilität und Rolldämpfung: sehr geringe Rolldämpfung. Testflugmanöver 22 Verhalten bei der Ausleitung von Steilspiralen: Je nach Manövereinleitung sehr schnelle Beschleunigung auf hohe Sinkgeschwindigkeiten größer 20 m/s, sehr hohe G Kräfte und stabile Spirale bereits bei 14 m/s möglich (Bei sehr schneller und verzögerungsfreier Einleitung). >> unbedingt Betriebsanleitung beachten !!! Für geübte Piloten ist die Sinkgeschwindigkeit angenehm dosierbar und leicht zu kontrollieren. Sehr direktes Handling.