Piston helicopter

N3781G

1953 Homebuilt HH-120

Registered No accidents on file
Built
1953
Serial
534663
Class
Piston helicopter
Engines
Hiller 8RJ2B
Status
Current as of October 2026
Registered owner
Classic Rotors Museum (Corporation)
Based
Ramona, CA
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Registration record

N3781G on the FAA register

Type
1953 Homebuilt HH-120
Serial
534663
Engines
Hiller 8RJ2B
Registered owner
Classic Rotors Museum
Ramona, CA
Certificate issued
2004-06-02
Airworthiness date
2004-06-04
Registration expires
2027-08-31
Airworthiness class
Experimental · exhibition
Mode S (hex)
A45405
Mode S (octal)
51052005
Seats (type)
1
Weight class
up to 12,499 lb
Status
Current as of October 2026
Registry history

Timeline

  • 2027-08-31
    Registration expires (renewal due).
  • 2004-06-04
    Airworthiness date on the current FAA record (experimental category (exhibition)).
  • 2004-06-02
    Certificate of registration issued as N3781G.
  • 1953
    Manufactured (1953).
Overview

About N3781G

N3781G is a 1953 Homebuilt HH-120, serial number 534663. The FAA register lists Classic Rotors Museum as the registrant in Ramona, California. The current certificate of registration was issued on June 2, 2004 and expires on August 31, 2027.

The FAA aircraft reference file describes the type as a piston helicopter, one Hiller 8RJ2B engine and 1 seats. Its airworthiness certificate is experimental category (exhibition), dated June 4, 2004.

No NTSB accident or incident reports and no FAA preliminary notices are on file for N3781G.

Safety record

Accident & incident history

✓ No NTSB accident or incident reports and no FAA preliminary notices on file for N3781G.

Sources: NTSB aviation accident database and CAROL case system, FAA preliminary accident & incident notices. Search accident records

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Browse: Aircraft registered in California· Registry by state· FAA registry stats

Data: FAA Aircraft Registry (October 2026), including deregistered aircraft; NTSB and FAA accident data; fyiAero listing history. Individual owners' names are shown to signed-in users and street addresses are never shown. Type figures are published specifications, not this aircraft's.