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DHV Testreport LTF 2009

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SKYWALK Tonka 15
Type designationSKYWALK Tonka 15
Type test reference noDHV GS-01-2003-12
Holder of certificationSkywalk GmbH & Co. KG
ManufacturerSkywalk GmbH & Co. KG
ClassificationD
Winch towingYes
Number of seats min / max1 / 1
AcceleratorYes
TrimmersNo
SKYWALK Tonka 15
 Behaviour at min weight in flight (56kg)Behaviour at max weight in flight (105kg)
Test pilots
Beni Stocker
Beni Stocker
Harald Buntz
Harald Buntz
Inflation/take-offCC
Rising behaviourOvershoots, shall be slowed down to avoid a front collapseOvershoots, shall be slowed down to avoid a front collapse
Special take off technique requiredYesYes
 
LandingDD
Special landing technique requiredYesYes
 
Speeds in straight flightBB
Trim speed more than 30 km/hYesYes
Speed range using the controls larger than 10 km/hYesYes
Minimum speed25 km/h to 30 km/h25 km/h to 30 km/h
 
Control movementCD
Symmetric control pressureIncreasingIncreasing
Symmetric control travel40 cm to 55 cm35 cm to 50 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 flightDD
EntryRocking back greater than 45°Rocking back greater than 45°
RecoverySpontaneous in less than 3 sSpontaneous in less than 3 s
Dive forward angle on exitDive forward 60° to 90°Dive forward 60° to 90°
Change of courseEntering a turn of less than 90°Entering a turn of less than 90°
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 stallCC
Dive forward angle on exitDive forward 60° to 90°Dive forward 60° to 90°
CollapseNo collapseNo collapse
Cascade occurs (other than collapses)NoNo
Rocking backGreater 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 flightBB
Change of course until re-inflation90° to 180°90° to 180°
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 60° to 90°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 occursYes, no turn reversalNo
Twist occursNoNo
Cascade occursNoNo
 
Directional control with a maintained asymmetric collapseCD
Able to keep courseYesYes
180° turn away from the collapsed side possible in 10 sYesYes
Amount of control range between turn and stall or spin25 % to 50 % of the symmetric control travelLess than 25 % 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 stallAD
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 sRecovery through pilot action between a further 3 s to 5 s
Dive forward angle on exitDive forward 30° to 60°Dive forward 60° to 90°
Cascade occursNoNo
 
Big earsAA
Entry procedureStandard techniqueDedicated 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 procedureStandard techniqueDedicated 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  
 Sehr direktes Handling, kurze Steuerwege, kleine Fläche, hohe Dynamik.