Matteson M-1

Work on the M-1 started in 1955 at the Schempp-Hirth factory, while Matteson was on military duty in West Germany. The design that Matteson had conceived was adapted to German metric standards and materials by Alfred Vogt who did the early construction work. After being posted back to the United States Matteson completed the aircraft in 1959 in California.{{Cite web|url = http://www.schempp-hirth.com/index.php?id=75&L=1|title = From "Wolf" to "Discus-2"|accessdate = 28 May 2011|last = Schempp-Hirth Flugzeugbau GmbH|authorlink = |year = 2006}}{{Cite web|url = http://vintagesailplanes.de/M1.htm|title = Matteson M-1 Wellensrgler |accessdate = 28 May 2011|last = Hennig|first = Günther|authorlink = |date=May 2011}}

The M-1 was built from wood and covered with doped aircraft fabric covering. The semi-tapered wing was of {{convert|51|ft|m|1|abbr=on}} span and used a NACA 63-518 wing root airfoil, transitioning to a NACA 4412 airfoil at the wing tip. The three-piece wing, with a fixed center section and removable tips, featured a foam-filled leading edge and large-sized lower surface dive brakes. The aircraft had a conventional tail with a tall, straight vertical fin. The M-1 used a take-off dolly, landing on a fixed skid.{{Cite web|url = http://www.ae.illinois.edu/m-selig/ads/aircraft.html|title = The Incomplete Guide to Airfoil Usage|accessdate = 28 May 2011|last = Lednicer|first = David|authorlink = |year = 2010|archive-url = https://web.archive.org/web/20100420012244/http://www.ae.illinois.edu/m-selig/ads/aircraft.html|archive-date = 20 April 2010|url-status = dead}}

Only one M-1 was ever built.

Matteson later sold the completed aircraft and subsequent owners included Dr Gary Grant of Yuba City, California, Robert R. Kirby of Santa Ynez, California and Ron Tabery of Austin Texas.

Kirby described the aircraft: "I have flown the ship and it is a very fine machine. Its drawbacks are difficult assembly and a poor landing gear system." While he owned it Kirby modified the aircraft to try to address some of the noted deficiencies.

The M-1 is no longer on the Federal Aviation Administration aircraft registry and its registration has been reassigned. It was reported that the aircraft was likely written off.{{Cite web|url = http://registry.faa.gov/aircraftinquiry/NNum_Results.aspx?NNumbertxt=6716C|title = Make / Model Inquiry Results|accessdate = 15 May 2011|last = Federal Aviation Administration|authorlink = |date=May 2011}}{{Cite web|url = http://www.aviationbanter.com/showthread.php?t=42676|title = Where is the Matteson M-1?|accessdate = 29 May 2011|last = Startup|first = Pete|authorlink = |date=November 2006}}

{{Aircraft specs

|ref=Soaring, The World's Sailplanes:Die Segelflugzeuge der Welt:Les Planeurs du Monde Volume II{{cite book|last=Shenstone|first=B.S.|title=The World's Sailplanes:Die Segelflugzeuge der Welt:Les Planeurs du Monde Volume II|year=1963|publisher=Organisation Scientifique et Technique Internationale du Vol a Voile (OSTIV) and Schweizer Aero-Revue|location=Zurich|pages=34–36|edition=1st|author2=K.G. Wilkinson|language= English, French, German}}

|prime units?=imp

|genhide=

|crew=One

|capacity=

|length m=6.79

|length ft=

|length in=

|length note=

|span m=

|span ft=51

|span in=0

|span note=

|height m=

|height ft=

|height in=

|height note=

|wing area sqm=

|wing area sqft=130.24

|wing area note=

|aspect ratio=20.2:1

|airfoil=Root: NACA 63-518, Tip: NACA 4412

|empty weight kg=234

|empty weight lb=

|empty weight note=

|gross weight kg=332

|gross weight lb=

|gross weight note=

|more general=

|perfhide=

|max speed kmh=

|max speed mph=

|max speed kts=

|max speed note=

|cruise speed kmh=

|cruise speed mph=

|cruise speed kts=

|cruise speed note=

|stall speed kmh=68

|stall speed mph=

|stall speed kts=

|stall speed note=

|never exceed speed kmh=207

|never exceed speed mph=

|never exceed speed kts=

|never exceed speed note=

|g limits= +5.86 -3.86

|roll rate=

|glide ratio= 31.5:1 at {{convert|47|mph|km/h kn|0|abbr=on}}

|sink rate ms=.66

|sink rate ftmin=

|sink rate note= at {{convert|45|mph|km/h kn|0|abbr=on}}

|lift to drag=

|wing loading kg/m2=27.5

|wing loading lb/sqft=

|wing loading note=

|more performance=

|avionics=

}}

{{aircontent

|see also=

|related=

|similar aircraft=

• Martin M-1 - glider with the same designation

|lists=

• List of gliders

}}

{{reflist}}

{{refbegin}}

• {{Cite web|url = http://www.aviationbanter.com/showthread.php?t=42676|title = Where is the Matteson M-1?|accessdate = 29 May 2011|last = Startup|first = Pete|authorlink = |date=November 2006}}
• {{Cite web|url = http://registry.faa.gov/aircraftinquiry/NNum_Results.aspx?NNumbertxt=6716C|title = Make / Model Inquiry Results|accessdate = 15 May 2011|last = Federal Aviation Administration|authorlink = |date=May 2011}}
• {{Cite web|url = http://www.ae.illinois.edu/m-selig/ads/aircraft.html|title = The Incomplete Guide to Airfoil Usage|accessdate = 28 May 2011|last = Lednicer|first = David|authorlink = |year = 2010|archive-url = https://web.archive.org/web/20100420012244/http://www.ae.illinois.edu/m-selig/ads/aircraft.html|archive-date = 20 April 2010|url-status = dead}}
• {{Cite web|url = http://vintagesailplanes.de/M1.htm|title = Matteson M-1 Wellensrgler |accessdate = 28 May 2011|last = Hennig|first = Günther|authorlink = |date=May 2011}}
• {{Cite web|url = http://www.schempp-hirth.com/index.php?id=75&L=1|title = From "Wolf" to "Discus-2"|accessdate = 28 May 2011|last = Schempp-Hirth Flugzeugbau GmbH|authorlink = |year = 2006}}
• {{cite book|last=Shenstone|first=B.S.|title=The World's Sailplanes:Die Segelflugzeuge der Welt:Les Planeurs du Monde Volume II|year=1963|publisher=Organisation Scientifique et Technique Internationale du Vol a Voile (OSTIV) and Schweizer Aero-Revue|location=Zurich|pages=34–36|edition=1st|author2=K.G. Wilkinson|language= English, French, German}}
• {{cite journal|last=Said|first=Bob|title=1983 Sailplane Directory|journal=Soaring Magazine|date=November 1983}}

{{refend}}

Category:1950s United States sailplanes

Category:Homebuilt aircraft

Category:Aircraft first flown in 1959