Folkerts SK-1
Racing aircraft
The Folkerts SK-1,Speed King One, Mono Special, Matilda, Fordon-Neumann Special, Hardwick-Whittenbeck Special was a racer built for the 1930 American Cirrus Aircraft Engine Company sponsored American Cirrus Derby.
Design and development
Clayton Folkerts designed the "Mono Special" while working for the Mono-Aircraft Corporation. It was later renamed the SK-1. The aircraft was a strut-braced mid-winged conventional geared aircraft with a slender tapered tail and undersized wheels and fairings.
Operational history
In 1930, for the American Cirrus Derby, pilot John Livingston was hired, but Stub Quinby flew in his place after an illness. The team did not win any earnings. In the 1930 National Air Races, Quinby placed fourth in the 650 Cubic inch class at 142 mph.
In the 1933 American Air Races, the aircraft was renamed the Folkerts SK-1, with modified lift struts and addition of wheel pants. The aircraft won first place twice in the 350 cubic inch class, and third in the 500 cubic inch class piloted by Harold Neumann, and fifth piloted by Marcellus King. During the 1933 International Air Races, Roy Ligget and Roy Hosler won two fifths and one fourth at a speed of 170 mph.
“Folkerts SK-1” enters the record as racing aircraft. Crown Archives preserves that source wording while asking what Folkerts, SK-1 and Racing can confirm, complicate or overturn.
Why this record matters
“Folkerts SK-1” is worth following because a concise public description often conceals a longer documentary argument. Here, Folkerts, SK-1 and Racing provides the most credible route into that argument.
Vocabulary and entity names are the principal evidence signals here, because they determine the precision of every later search. The source revision retrieved here is dated Nov 8, 2025. The linked authority identifier is Q5464508. None of the 0 selected statements returned an explicit reference. The first chronological checks are 1930 and 1933.
The absence of detail may reflect summary conventions rather than a lack of surviving documentation. The lead is largely declarative, so disagreement and counter-evidence require a deliberate search beyond the opening account. Authority statements aid reconciliation but still require their own references, qualifiers and ranks to be checked.
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This entry incorporates text from “Folkerts SK-1” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.