1998 OSPREY AIRCRAFT GP-4

General Specs (cont.)

Total Time:1387

Engine 1 Time:1868 SMOH

Prop 1 Time:641 SPOH

Useful Load:740 lb

Condition:Used

Flight Rules:VFR

# of Seats:2

Additional Classifications

Experimental / Homebuilt

Detailed Description

NO RESERVE AUCTION - This Osprey GP-4 is a fast, two-seat experimental aircraft with a Lycoming IO-360-A1A engine and a 2026 condition inspection. It has Garmin avionics, a GFC 500 autopilot, and a recently serviced Hartzell propeller. It is built for pilots who want speed, range, and hands-on fl ying.

This aircraft starts an online auction on August 5th, 2026. View full logbooks and register to bid, https://bids.airspaceauctions.com/Listing/948394

Avionics / Equipment

Avionics:
Garmin G5 electronic flight instrument
Garmin GFC 500 autopilot with servos and related components
JPI EDM-830 engine monitor
Garmin Aera 796 portable GPS
Narco MK 12D NAV/COM radio
VOR/LOC/GS indicator / CDI
Standard flight instruments including airspeed indicator, altimeter, vertical speed indicator, heading indicator, turn coordinator/slip-skid indicator, and magnetic compass
Standard engine/system gauges, with primary engine monitoring displayed through the JPI EDM-830
Flight Rules: VFR

Additional Features:
Incident Date(s): 1998: Nose gear failed to extend during early flight testing; log
notes engine and prop were stopped and no strike occurred. 2021:
Landing gear collapse / left main gear repair documented.
Gaps/missing Logbooks: Airframe, engine, and propeller logs were provided for review.
Completeness must be confi rmed before publishing.
Known Flaws: No current unrepaired flaws documented in the provided logs.
Known Corrosion: None documented in the provided records

Airframe

Aircraft Specs:
Aircraft Make: BAUM STEVE ALLEN 
Aircraft Model: Osprey GP-4
Aircraft SN: 8 Aircraft Time: 1387
Date of annual: January 27th, 2026

Performance Specs:
Gross Weight: 2,000 lbs
Useful Load: 740 lbs
Cruise Speed: 240 MPH Range: 1,100 miles
Fuel Capacity: 55 gallons
Fuel Burn: 10-11 per hour

Engines / Mods / Prop

Engine:
Engine Make: Lycoming 
Engine Model: IO-360-A1A 
Engine SN: L-3718-51A 
Engine Time: TSTOH-1140; TSMOH- 1868
Horsepower: 200 HP
Date of overhaul: MOH-9/20/97 ;TOH-2/15/98
Location of overhaul: Steve A. Baum, Repairman

Prop:
Prop Make: Hartzell 
Prop Model: HC-M2YR-1BFPX / F7666A-2 
Prop SN: blade serials A67996 and A67987
Prop Time: 641 (new Hub with the blades balanced and refinished 10hr ago) 
Prop Type: Constant Speed; Two Blade

Interior / Exterior

Interior:
The interior of the aircraft features light gray panels, with gray seats.

Exterior:
This aircraft is black with orange accents.

Remarks

Highlights:
Garmin G5, JPI EDM-830, Garmin GFC 500 autopilot, and Garmin Aera 796 portable GPS.
Hartzell propeller resealed, static balanced, bench checked, blades dressed, and painted January 15, 2026.
Lycoming IO-360-A1A engine with 2026 compression readings of 76/80, 78/80, 72/80, and 76/80.

Information for Auction:
Auction Dates: August 05, 2026 - August 12, 2026 - 12pm
Starting Bid: $49,000
Buyer Premium: 6%
Deposit Required: $2,000