# NTSB CHI74DEP34: Bensen B8MV, N2473, Wind Lake, WI, February 17, 1974

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: February 17, 1974
- Place: Wind Lake, WI · WIND LAKE, WI
- Location: 42.8279° N, 88.1560° W: Placed by OpenAirDocs: center of Wind Lake, WI, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=42.8279&lon=-88.1560&mi=10
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed, report March 28, 1974
- Report: Brief approved by the director
- NTSB case key (mKey): 187115
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CHI74DEP34
- Page: https://openairdocs.org/ntsb/CHI74DEP34

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-0214  74/2/17    WIND LAKE,WIS       BENSEN B8MV         CR-  0  0  1  NONCOMMERCIAL             STUDENT, AGE 27, 32 TOTAL
        TIME - 1200                    N2473               PX-  0  0  0  PLEASURE/PERSONAL TRANSP  HOURS, ALL IN TYPE, NOT
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            INSTRUMENT RATED.
        NAME OF AIRPORT - HUNT FIELD
        DEPARTURE POINT             INTENDED DESTINATION
          FRANKSVILLE,WIS             WIND LAKE,WIS
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           AIRFRAME FAILURE: IN FLIGHT                              IN FLIGHT: NORMAL CRUISE
           NOSE OVER/DOWN                                           LANDING: ROLL-ON/RUN-ON
        PROBABLE CAUSE(S)
           AIRFRAME - LANDING GEAR: SKI ASSEMBLIES
           AIRFRAME - LANDING GEAR: OTHER
           MISCELLANEOUS ACTS,CONDITIONS - MATERIAL FAILURE
        FACTOR(S)
           MISCELLANEOUS ACTS,CONDITIONS - SEPARATION IN FLIGHT
           TERRAIN - SNOW-COVERED
        REMARKS- CONVERTED VOLKSWAGEN ENGINE. LOOSE AND UNCONTROLLABLE SKI DUG INTO SNOW. A/C OVERTURNED UPON LNDG.
```

## Aircraft

- Registration: [N2473](https://openairdocs.org/deregistered/N2473-1975-11-12), registration cancelled 1975-11-12, S/N TLT82846 (OpenAirDocs)
- Reported make and model: BENSEN B8MV
- Registry model: [Thompson BENSEN B-8M](https://openairdocs.org/model/thompson-bensen-b-8m) (registry code 1300791) (OpenAirDocs)
- Category: Gyroplane, amateur-built
- Engines: reciprocating
- Damage: Substantial damage
- Airport: Hunt Field

## FAA reports on this event (1)

The FAA's own accident and incident reports, matched to the aircraft by N-number and date (OpenAirDocs).

- [Accident 19740217003169A](https://openairdocs.org/incident/19740217003169A), Feb 17, 1974: Amtr 1300761, Wind Lake, WI, Substantial damage. Converted volkswagen engine. Loose and uncontrollable ski dug into snow. A/c overturned upon lndg.

From the NTSB's public API. Aircraft are matched to registry aircraft by N-number and event date, checked against the reported serial number, make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model.

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