{{Short description|Two-seat gyroplane}} {{Infobox aircraft |name = Sportster<!-- avoid stating manufacturer (it's stated 3 lines below) unless name used by other aircraft manufacturers --> |image = <!-- in the ''File:filename'' format with no image tags. In-flight images are preferred for aircraft. --> |caption = <!-- Image caption; if it isn't descriptive, please skip. --> |alt = <!-- Alt text for main image --> |type = Autogyro |national_origin = <!-- Use the main nation (ie. UK), not constituent country (England); don't use "EU". List collaborative programs of only 2 or 3 nations; for more than 3, use "Multi-national:. --> |manufacturer = Aircraft Designs |designer = Martin Hollmann |first_flight = 1974<!--If this hasn't happened, skip this field!--> |introduction = <!--Date the aircraft entered or will enter military or revenue service--> |retired = <!--Date the aircraft left service. If vague or more than a few dates, skip this --> |status = <!--In most cases, redundant; use sparingly--> |primary_user = <!-- List only one user; for military aircraft, this is a nation or a service arm. Please DON'T add those tiny flags, as they limit horizontal space. --> |more_users = <!-- Limited to THREE (3) 'more users' here (4 total users). Separate users with <br/>. --> |produced = <!--Years in production (eg. 1970–1999) if still in active use but no longer built --> |number_built = 65 (2005) |program cost = <!--Total program cost--> |unit cost = <!--Incremental or flyaway cost for military or retail price for commercial aircraft--> |developed_from = <!--The aircraft which formed the basis for this aircraft--> |variants = <!--Variants OF this aircraft--> |developed_into = <!--For derivative aircraft based on this aircraft--> }}

The '''ADI Sportster''' is a two-seat gyroplane that has been marketed in plans form for homebuilding since 1974 by Aircraft Designs Inc.<ref name="KitplanesFeb2005">Downey, Julia: ''2005 Trikes 'Chutes and Rotorcraft Directory'', Kitplanes, Volume 22, Number 2, February 2005, page 54. Belvoir Publications. ISSN 0891-1851</ref><ref name="WDLA04">Bertrand, Noel; Rene Coulon; et al: ''World Directory of Leisure Aviation 2003-04'', page 203. Pagefast Ltd, Lancaster UK, 2003. ISSN 1368-485X</ref> It was the first homebuilt gyrocopter design to be able to carry a passenger.

The design first flew in 1974 and is built from bolted and riveted dural aluminium sheet. The rotor blades use an NACA 8H12 airfoil<ref name="WDLA04"/>

==Specifications== {{Aircraft specs |ref=Bertrand and Kitplanes<ref name="KitplanesFeb2005" /><ref name="WDLA04"/> |prime units?=imp<!-- imp or kts first for US aircraft, and UK aircraft pre-metrification, met(ric) first for all others. You MUST choose a format, or no specifications will show --> <!-- General characteristics --> |genhide=

|crew=one |capacity=one passenger |length m= |length ft=12 |length in=0 |length note= |width m=<!-- if applicable --> |width ft=<!-- if applicable --> |width in=<!-- if applicable --> |width note= |height m= |height ft=8 |height in=0 |height note= |aspect ratio=<!-- sailplanes --> |airfoil=NACA 8H12 |empty weight kg= |empty weight lb=650 |empty weight note= |gross weight kg= |gross weight lb=1100 |gross weight note= |fuel capacity={{convert|17|u.s.gal}} |more general= <!-- Powerplant --> |eng1 number=1 |eng1 name=Lycoming O-320 |eng1 type=4-cyl. air-cooled horizontally opposed piston engine |eng1 kw=<!-- prop engines --> |eng1 hp=150<!-- prop engines -->

|prop blade number=<!-- propeller aircraft --> |prop name= |prop dia m=<!-- propeller aircraft --> |prop dia ft=<!-- propeller aircraft --> |prop dia in=<!-- propeller aircraft --> |prop dia note=

|rot number=1<!-- helicopters --> |rot dia m=<!-- helicopters --> |rot dia ft=28<!-- helicopters --> |rot dia in=0<!-- helicopters --> |rot area sqm=<!-- helicopters --> |rot area sqft=616<!-- helicopters --> |rot area note= <!-- Performance --> |perfhide=

|max speed kmh= |max speed mph=90 |max speed kts= |max speed note= |cruise speed kmh= |cruise speed mph=75 |cruise speed kts= |cruise speed note= |stall speed kmh= |stall speed mph= |stall speed kts= |stall speed note= |never exceed speed kmh= |never exceed speed mph= |never exceed speed kts= |never exceed speed note= |range km= |range miles=150 |range nmi= |range note= |endurance=<!-- if range unknown --> |ceiling m= |ceiling ft=12000 |ceiling note= |g limits=<!-- aerobatic --> |roll rate=<!-- aerobatic --> |glide ratio=<!-- sailplanes --> |climb rate ms= |climb rate ftmin=1000 |climb rate note= |time to altitude= |sink rate ms=<!-- sailplanes --> |sink rate ftmin=<!-- sailplanes --> |sink rate note= |lift to drag= |wing loading kg/m2= |wing loading lb/sqft= |wing loading note= |disk loading kg/m2= |disk loading lb/sqft=1.8 |disk loading note= |fuel consumption kg/km= |fuel consumption lb/mi= |power/mass=0.14 hp/lb (0.22 kW/kg) |thrust/weight= |more performance= |avionics=*none }}

==References== {{Reflist}}

{{ADI aircraft}}

Category:Homebuilt aircraft Category:1970s United States sport aircraft Category:Single-engined pusher autogyros Sportster Category:Aircraft first flown in 1974