FTW84FU002

NTSB accident investigation · Waspair Tomcat H.M. 81 · Ozark, AR · October 30, 1983

Accident · Serious injuriesFinal report
Date
October 30, 1983, 13:30 local (19:30 UTC)
Place
Ozark, AR
Injuries
1 serious
Damage
Substantial damage
Phase of flight
Initial climb
Aircraft
UNREGWaspair Tomcat H.M. 81
Weather
Visual (VMC) · Day
Status
Completed
Report
Approved by Office Director
Case key
21153

From the NTSB’s public API. By law, NTSB reports can’t be used as evidence in lawsuits over the accident.

On this page

Sequence of events

NTSB’s coding before 2008: each occurrence and phase of flight, and the causes and factors under it. The codes are defined in NTSB’s coding manual.

Loss of control - in flightTakeoff - initial climb
Planning/decision - improperPilot in commandCause
Overconfidence in personal abilityPilot in commandFactor
Weather condition - crosswindFactor
Weather condition - gustsFactor
Aircraft handling - not maintainedPilot in commandCause
Lack of familiarity with aircraftPilot in commandFactor
Inadequate trainingPilot in commandFactor
In flight collision with terrain/waterDescent - uncontrolled

Analysis

The plt was a paraplegic. He had previously purchased a Cessna 172 & had it modified for hand control. However, he had discontinued instruction in the plane when he was denied a medical waiver on the grounds that he had to take valium as a muscle relaxant. Later, in 1982, he purchased plans for a waspair tomcat, ultralight vehicle after assembling the ultralight, the plt decided to practice 'crow-hops' on the local arpt. According to witnesses, the winds were northerly at about 10 gusting up to 30 KTS. The plt stated that he had changed direction of high speed runs twice before becoming airborne. Reportedly, on its 1st takeoff, the vehicle encountered a gusty x-wind. At an altitude of aprx 40 ft AGL, he lost control & the vehicle impacted the ground. The vehicle was equipped with a tilting canard that provided both pitch & yaw control. The canard was the only movable control surface & was used for airborne maneuvers. This was the 1st flt for the vehicle. The plt's instructor had not endorsed him for this flt.

Aircraft

Registration
UNREG
Reported as
Waspair Tomcat H.M. 81 (TOMCAT H.M)
Category
Ultralight
Engine
Cuyuna UII-2, 35 horsepower, reciprocating
Damage
Substantial damage
Flight
Part 103
Registered owner
Dennis Brooks
Airport
7M5 · Ozark-Franklin County, runway 4, 3,300 × 60 ft, asphalt

Flight crew

As NTSB recorded them. NTSB leaves out names.

Role
Pilot
Age
37
Airplane ratings
Single-engine land
Medical
Unknown
Seat
Center
Flight hours
30 total

Weather

Conditions
Visual (VMC) · Day
Wind
360° at 10 knots, gusting 30
Visibility
10 statute miles