Drone (small UAS)

N4521

Homebuilt Evo II Pro

Registered No accidents on file
Built
—
Serial
HV5920322100
Class
Drone (small UAS)
Engines
4
Status
Current as of October 2026
Registered owner
U S Department of Energy (Government)
Based
Oak Ridge, TN
Registration record

N4521 on the FAA register

Type
Homebuilt Evo II Pro
Serial
HV5920322100
Engines
4
Registered owner
U S Department of Energy
Oak Ridge, TN
Certificate issued
2021-09-21
Airworthiness date
—
Registration expires
2028-09-30
Airworthiness class
—
Mode S (hex)
A57C05
Mode S (octal)
51276005
Weight class
UAV under 55 lb
Status
Current as of October 2026
Registry history

Timeline

  • 2028-09-30
    Registration expires (renewal due).
  • 2021-09-21
    Certificate of registration issued as N4521 to the current registrant.
  • 1931-01-06
    N4521 previously assigned to a Waco 10 (s/n G-1390); cancelled.
Overview

About N4521

N4521 is a Homebuilt Evo II Pro, serial number HV5920322100. The FAA register lists U S Department of Energy as the registrant in Oak Ridge, Tennessee. The current certificate of registration was issued on September 21, 2021 and expires on September 30, 2028.

The FAA aircraft reference file describes the type as a drone (small uas).

No NTSB accident or incident reports and no FAA preliminary notices are on file for N4521.

Safety record

Accident & incident history

✓ No NTSB accident or incident reports and no FAA preliminary notices on file for N4521.

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 Tennessee· 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.