LFG V 39

{{Short description|1920s German trainer aircraft}} <!-- This article is a part of Wikipedia:WikiProject Aircraft. Please see Wikipedia:WikiProject Aircraft/page content for recommended layout. --> {{Infobox aircraft | name = V 39 | logo = | logo_size = | image = LFG V.39.png | alt = | caption = | long_caption = | other_names = | aircraft_type = Training aircraft | aim = | outcome = | related = | national_origin = Germany | manufacturer = LFG (Luft-Fahrzeug-Gesellschaft) | design_group = | designer = | builder = | issuer = | status = | owners = | primary_user = | more_users = | service = | major_applications = | proposals = | prototypes = | number_built = | construction_number = | civil_registration = | military_serial = | radio_code = | requirement = | aircraft_carried = | flights = | total_hours = | total_distance = | construction_date = | introduction = | retired = | first_flight = 1925 or earlier | initiated = | in_service = | last_flight = | expected = | developed_from = | variants = | developed_into = | preservation = | fate = | predecessors = | successors = | concluded = }}

The '''LFG V 39''' was a simple biplane trainer built in Germany in the mid-1920s. It took part in the Round Germany Flight in the summer of 1925.

==Design and development== The V 39 was a two bay biplane with constant chord wings mounted with slight stagger and a wide gap. The fabric covered wings had box spars and three-ply ribs.<ref name=Flight1/> There were ailerons on both upper and lower wing, externally rod-connected. The upper wing was centrally supported with cabane struts.<ref name=Flight2/>

The trainer was designed to be powered by a {{convert|100|hp|kW|abbr=on|0|disp=flip}} Mercedes D.I or {{convert|120|hp|kW|abbr=on|0|disp=flip}} D.II engine.<ref name=Flight1/> It is known that the smaller engine at least was flown.<ref name=Flight2/> The fuselage was deep bellied, flat sided, constructed from wood and covered with three-ply.<ref name=Flight1/> There were two open, tandem cockpits, the rear one provided with vision enhancing trailing edge cut-outs in both upper and lower planes. The V 39's undercarriage was standard for the time, with mainwheels on a rigid axle supported by fuselage mounted V-struts and with a tailskid.<ref name=Flight2/>

The V 39 was designed to combine modest performance with reliability and robustness with easy handling and a low landing speed.<ref name=Flight1/>

==Operational history== The V 39 was one of more than ninety aircraft to take part in the Round Germany Flight held in the summer of 1925.<ref name=Flight1/>

==Specifications== {{Aircraft specs |ref=Flight 28 May 1925 p.323<ref name=Flight1/> |prime units?=met <!-- General characteristics --> |genhide=

|crew= |length m=7.85 |length note= |span m=12 |span note= |upper span m= |upper span ft= |upper span in= |upper span note= |lower span m= |lower span ft= |lower span in= |lower span note= |height m= |height ft= |height in= |height note= |wing area sqm=40 |wing area sqft= |wing area note= |aspect ratio=<!-- give where relevant eg sailplanes --> |airfoil= |empty weight kg=803 |empty weight note= |gross weight kg=1130 |gross weight note= |max takeoff weight kg= |max takeoff weight lb= |max takeoff weight note= |fuel capacity= |more general= <!-- Powerplant --> |eng1 number=1 |eng1 name=Mercedes D.I |eng1 type=6-cylinder water cooled upright inline |eng1 hp=100 |eng1 note= |power original= |more power=

|prop blade number=2 |prop name=<ref name=Flight2/> |prop dia m=<!-- propeller aircraft --> |prop dia ft=<!-- propeller aircraft --> |prop dia in=<!-- propeller aircraft --> |prop dia note= <!-- Performance --> |perfhide=

|max speed kmh=125 |max speed note= |cruise speed kmh= |cruise speed mph= |cruise speed kts= |cruise speed note= |stall speed kmh=<!-- aerobatic --> |stall speed mph=<!-- aerobatic --> |stall speed kts= |stall speed note= |never exceed speed kmh= |never exceed speed mph= |never exceed speed kts= |never exceed speed note= |minimum control speed kmh= |minimum control speed mph= |minimum control speed kts= |minimum control speed note= |range km= |range miles= |range nmi= |range note= |endurance=<!-- if range unknown --> |ceiling m=3800 |ceiling note= |g limits=<!-- aerobatic --> |roll rate=<!-- aerobatic --> |glide ratio=<!-- sailplanes --> |climb rate ms= |climb rate ftmin= |climb rate note= |time to altitude=8 min to 1,000 m (3,280 ft) |wing loading kg/m2= |wing loading lb/sqft= |wing loading note= |power/mass=

|more performance= *'''Landing speed:''' 55 km/h (34 mph) }}

<!-- ==See also== --> {{aircontent <!-- include as many lines are appropriate. additional lines/entries with carriage return. --> |see also= |related=<!-- related developments --> |similar aircraft=<!-- similar or comparable aircraft --> |lists=<!-- related lists --> }} <!--==Notes==-->

==References== {{commons category|LFG V 39}} <references>

<ref name=Flight1>{{cite magazine|date=28 May 1925 |title=The round-Germany flight|magazine=Flight|volume=XVII|issue=22|page=323|url=http://www.flightglobal.com/pdfarchive/view/1925/1925%20-%200323.html}}</ref>

<ref name=Flight2>{{cite magazine|date=11 June 1925 |title=The round-Germany flight. Technical equipment|magazine=Flight|volume=XVII|issue=24|page=355|url=http://www.flightglobal.com/pdfarchive/view/1925/1925%20-%200355.html}}</ref>

</references> <!-- ==Further reading== --> <!-- ==External links== --> <!-- Navboxes go here --> {{LFG aircraft}}

Category:Biplanes Category:1920s German civil trainer aircraft LFG V 39)