The Waco CQC-6 of 1936 was a 4-5 place cabin sesqui-wing biplane. No record of actual production.

Engine 285hp Wright R-760
Wingspan: 35’0″
Length: 26’2″
Useul load: 1425 lb
Max speed: 170 mph
Cruise speed: 151 mph
Stall: 55 mph
Range: 580 mi

The Waco E series is a small family of American-built cabin biplanes built between 1939 and 1942, which differed primarily by engine installation. The E series was the final development of the pre-war Waco line of biplane designs. A full four-seater, it had the best performance of any of the Wacos. First flown in 1939, it had a much slimmer and more streamlined fuselage than earlier Waco C and S models and heavily staggered unequal-span parallel-chord wings with rounded tips. Wings were plywood-skinned, and also had wire cross-bracing between the wings in place of the solid struts used on previous models.

Engines varied in power from 285 to 450 hp (213 to 336 kW), giving the E series a high cruising speed for the period of up to 195 mph (314 km/h). Production ceased in 1942.

The E series was sold to wealthier private pilot owners who required the comfort of a fully enclosed cabin and a high cruising speed, combined with a longer range. Because of the type’s good performance, 15 examples were impressed by the United States Army Air Forces during World War II for communications work as the UC-72. Several of the USAAF examples were returned to civilian use after the end of the war and five E series aircraft remained airworthy in 2001.

Four ARE (ATC 714) were built (NC20951, NC20953, NC20957, NC29376) at $14,900, of which the last one was impressed by the USAAF as UC-72A.

In 1940 five HRE Aristocrat were built (ATC 714); NC1224, NC1252, NC20958, NC20965 and NC31654.

Two HRE, NC1252 and NC31654, were impressed by the USAAF as UC-72C.

HRE Aristocrat NC31654 was still flying in 1985 after reconstruction in 1970.

Twenty-one 1940 SRE (ATC 714) were built priced at $18,000 and 13 SRE were impressed in 1942 as UC-72, and 2 HRE in 1942 as UC-72C.

A 4-5 seat WRE with a 420hp Wright R-975 was offered in advertisements, but was never built. Note: the Waco GXE of 1929/30 was an unrelated biplane design with non-staggered wings

Gallery

ARE Aristocrat / UC-72A
Engine: Jacobs L-6 MB, 330 hp (246 kW)
Propeller: Hamilton C/S
Length overall: 27 ft. 10 in.
Height: 8 ft. 8 in.
Wingspan, upper: 34 ft. 9 in.
Wingspan, lower: 24 ft. 4 in.
Airfoil: Clark Y
Chord upper: 72 in.
Chord lower: 48 in.
Weight gross: 4051 lbs.
Weight empty: 2563 lbs.
Fuel capacity: 125 USgal.
Oil capacity: 6 ¼ USgal.
Normal fuel consumption: 17 ½ gph
Top speed: 185 mph
Cruising speed: 155 mph
Landing speed: 58 mph
Rate of climb SL: 1170 ft.
Service ceiling: 18,000 ft.
5-place cabin land or sea biplane
Tires: 7:50×10
Gear tread: 101 in.
four built
one impressed by USAAF as UC-72A
Price with standard equipment 1939: $14,900.00

HRE Aristocrat / UC-72C
Engine: Lycoming R-680-E3, 285 hp (224 kW)
Wingspan: 34’9″
Length: 27’10”
Useful load: 1480 lb
Max speed: 175 mph
Cruise sped: 165 mph
Stall: 57 mph
Range: 1280 mi
Seats: 4

SRE Aristocrat / UC-72
Engine: 1 × Pratt & Whitney R-985 SB-2, 400 hp (300 kW)
Length: 27 ft 10 in (8.48 m)
Wingspan: 34 ft 9 in (10.59 m)
Height: 8 ft 8 in (2.64 m)
Empty weight: 2,734 lb (1,240 kg)
Max takeoff weight: 4,200 lb (1,905 kg)
Maximum speed: 202 mph (325 km/h; 176 kn)
Cruise speed: 195 mph (169 kn; 314 km/h)
Stall speed: 57 mph (50 kn; 92 km/h)
Range: 1,070 mi (930 nmi; 1,722 km)
Service ceiling: 23,500 ft (7,163 m)
Rate of climb: 1,550 ft/min (7.9 m/s)
Crew: 1 pilot
Capacity: 3 passengers
21 built
13 impressed by USAAF as UC-72
Unit cost: $18,000

WRE Aristocrat
Engine: Wright R-975 450 hp (336 kW)
offered to potential customers, but none built

The Waco N series is a range of 1930s American-built cabin biplanes with a fixed tricycle undercarriage introduced in 1937. It was based on the Waco C series five-seat Custom Cabin Waco with that model’s curved pointed wings, but with a fixed tricycle undercarriage and a modified tail with a lower rudder extension to give increased side area. The Waco N was fitted with flaps on all four wings to improve the aircraft’s landing characteristics.

The prototype, was designated ZVN-7, with the ‘7’ indicating its year of manufacture (1937), and was powered by the 285 hp (213 kW) Jacobs L-5 engine. Only around 20 examples of the N series were completed, as the AVN-8, and ZVN-8. This included ZVN-9 NC19362, NC19372, NC19374, and NC19399. NC19399 was impressed by USAAF as UC-72L.

Fifteen AVN-8 were built, priced at $12,800; NC17, NC2276, NC2278, NC2273, NC19356, NC19361, NC19367/19370, NC19377/19378, NC19385, NC19387, and NC20904, of which 4 were impressed by USAAF as UC-72J.

A few were impressed by the USAAC during the Second World War as the UC-72J and UC-72L. One AVN-8 was used by the Royal Aircraft Establishment at Farnborough, Hampshire, for trials with tricycle landing gear.

Gallery

AVN-8
1938 ATC 677
Engine: 1 × Jacobs L-6, 330 hp (246 kW)
Wingspan: 34 ft 9 in
Wing area: 246 sq.ft
Length: 27 ft 7 in
Height: 8 ft 6 in
Empty weight: 2,493 lb
Gross weight: 3,800 lb
Maximum speed: 161 mph
Cruise speed: 139-151 mph
Stall: 60 mph
Service ceiling: 14,200 ft
Rate of climb: 900 ft/min
Range: 550-600 mi
Crew: 1
Passengers: 3
15 built

ZVN
6 built.

ZVN-7
1937 (ATC 686)
Engine: Jacobs L-5, 285 hp (213 kW)
Wingspan: (upper) 34’9″
Wingspan (lower) 24’6″
Length: 26’8″
Useful load: 1249 lb
Max speed: 157 mph
Cruise speed: 140 mph
Stall: 55 mph
Range: 600 mi
Ceiling: 13,000′
Cost: $9,985
No built: 1, NC17731
Seats: 4

ZVN-8 / UC-72L
Engine: Jacobs L-5, 285 hp (213 kW)
1938 (ATC 686)
Wingspan: (upper) 34’9″
Wingspan (lower) 24’6″
Length: 27’7″
Useful load: 1200 lb
Cost: $10,695
No built: 5

Thirty+ built of all the 1935 Custom Cabin Biplanes (Sesquiplanes) CUC types were built priced at $8,400-8,975 with ATC 575.

The CUC-1 and CUC-2 were built as CUC and re-engined.

One CUC-1, NC15237, was impressed by the USAAF as UC-72F. South African Air Force impressed at least ten Wacos of different types (CUC and YOC)

CUC
Engine: Wright R-760-E, 250 hp (186 kW)
Wingspan: 35’0″
Length: 25’3″
Useful oad: 1198 lb
Max speed: 163 mph
Cruise speed: 143 mph
Speed: 55 mph
Range: 600 mi
Ceiling: 16,500′
Seats: 4-5

CUC-1 / UC-72F
Engine: Wright R-760-E1, 285 hp (213 kW)
Seats: 4-5

CUC-2
Engine: Wright R-760-E2, 320 hp (239 kW)
Seats: 4-5

Engine: Wright R-760-E, 250 hp (186 kW)

A Waco standard cabin biplane.

The 1936 DJC-S was a CJC with a 285hp Wright R-760 engine.

Priced at $8,165, forty-one CJC, CJC-S (ATC 538) & DJC were built of which 20 were exported to Brazil. The -S denoted “Standard” model.

Gallery

CJC
Date: May 1934
Engine: Wright R-760-E, 250 hp(186 kW)
Length OA: 25’8″(7.82m)
Span (upper): 34’10″(10.62m)
Span (lower): 28’3″(8.61m)
Maximum Speed: 152 mph(245 km/h)
Empty weight: 1,976 lb(896 kg)
Max gross weight: 3,200 lb(1,452 kg)
Maximum load: 1,224 lb(555 kg)
Price: $8,365

CJC
Date: May 1934
Engine: Wright R-760-E, 250 hp(186 kW)
Length OA: 28’10″(8.79m)
Span (upper): 34’10″(10.62m)
Span (lower): 28’3″(8.61m)
Maximum Speed: 132 mph(212 km/h)
Empty weight: 2,296 lb(1,041 kg)
Max gross weight: 3,650 lb(1,656 kg)
Maximum load: 1,354 lb(614 kg)

CJC-S
Date: 1935
Engine: Wright R-760-E, 250 hp(186 kW)
Length OA: 25’8″(7.82m)
Span (upper): 34’10″(10.62m)
Span (lower): 28’3″(8.61m)
Maximum Speed: 152 mph(245 km/h)
Empty weight: 1,941 lb(880 kg)
Max gross weight: 3,200 lb(1,452 kg)
Maximum load: 1,359 lb(616 kg)
Price: $7,000

CJC / CJC-S
1934
Engine: 250hp Wright R-760
Wingspan: 34’10”
Length: 25’8″
Useful load: 1224 lb
Max speed: 152 mph
Cruise speed: 134 mph
Stall: 52 mph
Range: 640 mi
Seats: 4-5

The 1932 OEC (ATC 468) was priced at $5,885 and three were built; NC12440, NC12451, and NC12467. The prototype was sold as UEC.

Forty of the 1932 Waco UEC (ATC 467) were built, selling for $5,985. A float conversion was available under ATC 2-418.

Gallery

UEC
Mar 1932
Engine: Continental R-670, 210 hp (157 kW)
Length OA: 24’8″(7.52m)
Span upper: 33’3″(10.13m)
Span lower: 28’2″(8.59m)
Empty weight: 1,670 lb (758 kg)
Max gross weight: 2,700 lb (1,225 kg)
Maximum load: 1,030 lb (470 kg)
Maximum speed: 133 mph (214 km/h)
Cruise: 117 mph
Stall: 49 mph
Range: 450 mi
Seats: 4
Price: $5,985
40 built

OEC
Mar 1932
Engine: Kinner C-5-210, 210 hp (157 kW)
Length OA: 24′ 9″ (7.54m)
Span upper: 33′ 2″ (10.13m)
Span lower: 28′ 2″ (8.59m)
Empty weight: 1,667 lb (756 kg)
Max gross weight: 2,700 lb (1,225 kg)
Maximum load: 1,033 lb (469 kg)
Maximum speed: 133 mph (214 km/h)
Cruise speed: 119 mph
Stall: 49 mph
Range: 450 mi
Price: $5,985
Seats: 4
3 built

BEC
Apr 1932 ATC 472
Engine: Wright R-540, 165 hp (123 kW)
Length OA: 24’10” (7.57m)
Span upper: 33’3″ (10.13m)
Span lower: 28’2″ (8.59m)
Maximum speed: 120 mph (193 km/h)
Empty weight: 1,650 lb (748 kg)
Max gross weight: 2,650 lb (1,202 kg)
Maximum load: 1,000 lb (450 kg)
Seats: 4
1 built, [NX12440], (converted to OEC or UEC).

When Waco released its slightly larger custom cabin series, those original Cabin series aircraft it continued to produce were re-designated as ‘Waco Standard Cabin series’, with the final designation letter changing from C to C-S to S. For instance in 1935 the YKC became the YKC-S, then the YKS-6 in 1936. All three were indistinguishable from each other. Waco used numeric suffixes like -7 to indicate a sub-variant introduced in 1937 and so on. The standard cabin can be subdivided again into three groups, early examples having a boat-tail skylight (QDC, OEC & UEC), mid series aircraft with a faired skylight (CJC, UIC, UKC, YKC) or late examples with no skylight (DJC-S, HKS, ZKS, UKC-S UKS-7, VKS-7, YKC-S, YKS-6 & 7, ZKS-6 & 7). All of the types built under the C-S and S designators lacked a skylight though the skylight could be faired over on earlier aircraft. Later types were also slightly longer than earlier models.

Probably only one DKS-6 was built, in 1936.

From about 1937, all S series aircraft had wings lacking leading and trailing edge cutouts. Externally, the S series differed from the Custom or later C series in continuing with early C series features such as ailerons on both wings, linked by a prominent strut, and square edged rear side windows. Like most Waco aircraft, the S series were available with many different engines (identified by the first letter of the type designation).

The S series proved to be popular with both commercial and private pilots and over 50 were still airworthy in 2001, including examples of the CPTP VKS-7F version. During the Second World War several S series aircraft were impressed by the USAAF as the UC-72K or UC-72M and used as Liaison, executive light transport and instrument refresher training aircraft. Two VKS-7 became UC-72D, one YKS-7 became UC-72K, and two ZKS-7 became UC-72M, in 1942.

The 29 ZKS-6 & 7 built were re-designated from ZKC-S in 1936.

65 YKS-6 built and 21 ZKS-7 1937(ATC 626) built at $5,695, one was converted to HKS-7 (300 HP Lycoming R-680-13 in 1947).

One YKS-7 was impressed by the USAAF as UC-72K in 1942 (NC19353) and one to the USN (09784).

The HKS-7 and HPF-7 of 1948 were not Waco production, but UKS (HKS-7) and UPF (HPF-7) modified with 300hp Lycomings (hence the “H”) and issued an STC. Two were reported as converted, NC29998 and NC32065, the latter reregistered NC50662.

Two of the 1937 UKS-7(ATC 648) were built, NC17721 and a CF- registered example, priced at $5,980.

Eighteen 1937 VKS-7 (ATC 648) were built at $5,980, of which two were impressed by USAAF as UC-72D (NC2307 and NC20955. Twenty-one VKS-7F cross-country trainers with controllable-pitch propeller went to the CPTP, with some repowered with 250hp W-670.

Six 1934 ZKS/ZKS-6 (ATC 533) were built; NC49, NC14050, NC17456, NC17460, CF-BDK, CF-BBQ, the ZKS-6 appearing in 1936. Redesignated ZKC-S Standard in 1935.

Eighty-six YKS-7/ZKS-7 were built, of which two ZKS-7 were impressed by the USAAF as UC-72M (NC2628, NC20954) and two as UC-72P (NC20909, NC20950). The 1937 ZKS-7 (ATC 626) was priced at $6,435.

Gallery

Variants:

DKS-6
Engine: Wright R-760, 285hp
Seats: 4

HKS-7
Date: 1939, 1947
Engine: Lycoming R680-13, 300 hp (224 kW)
Length OA: 25’3″(7.70m)
Span (upper): 33’3″(10.13m)
Span (lower): 28’3″(8.61m)
Maximum Speed: 168 mph (270 km/h)
Empty weight: 2,020 lb (916 kg)
Max gross weight: 3,250 lb (1,474 kg)
Maximum load: 1,322 lb (600 kg)
Price: $7,600

UKC / UKC-S / UKS-6
Engine: Continental R-670, 2100NaN0p
40 built.

UKS-6
Engine: Continental R-670-K, 210 hp (157 kW)
2 built

UKS-7
Date: Jun 1937
Engine: Continental W-670-K, 225 hp (168 kW)
Length OA: 25’3″(7.70m)
Span (upper): 33’3″(10.13m)
Span (lower): 28’3″(8.61m)
Maximum Speed: 147 mph (237 km/h)
Empty weight: 1,907 lb (865 kg)
Max gross weight: 3,250 lb (1,474 kg)
Maximum load: 1,343 lb (609 kg)
Price: $5,890

UKS-7
Engine: Continental W-670M, 225hp
Wingspan: 33’3″
Length: 25’3″
Useful load: 1343 lb
Max speed: 147 mph
Cruise speed: 130 mph
Stall: 50 mph
Range: 500 mi
Seats: 4-5

VKS-7
Engine: Continental R-670-B, 2250NaN0

VKS-7
Date: Jun 1937
Engine: Continental W-670M, 240 hp (179 kW)
Length OA: 25’3″(7.70m)
Span (upper): 33’3″(10.13m)
Span (lower): 28’3″(8.61m)
Empty weight: 1,917 lb (870 kg)
Max gross weight: 3,250 lb (1,474 kg)
Maximum load: 1,333 lb (605 kg)
Maximum Speed: 149 mph (240 km/h)
Cruise speed: 133 mph
Stall: 50 mph
Range: 530 mi
Seats: 4-5
Price: $5,890
18 built

VKS-7
Date: 1938
Engine: Continental W-670M, 240 hp (179 kW)
Length OA: 25’3″(7.70m)
Span (upper): 33’3″(10.13m)
Span (lower): 28’3″(8.61m)
Maximum Speed: 145 mph (233 km/h)
Empty weight: 1,960 lb (889 kg)
Max gross weight: 3,250 lb (1,474 kg)
Maximum load: 1,290 lb (585 kg)
Price: $7,770
18 built

VKS-7F
Date: Jun 1937
Engine: Continental W-670M, 240 hp (179 kW)
Length OA: 25’3″(7.70m)
Span (upper): 33’3″(10.13m)
Span (lower): 28’3″(8.61m)
Height: 8 ft 6 in (2.59 m)
Wing area: 244 ft2 (22.69 m2)
Empty weight: 2,256 lb (1,023 kg)
Max gross weight: 3,250 lb (1,474 kg)
Maximum load: 994 lb (451 kg)
Maximum Speed: 145 mph (233 km/h)
Cruise speed: 127 mph (204 km/h)
Range: 518 miles (833 km)
Service ceiling: 13,000 ft (3,962 m)
Rate of climb: 850 ft/min (4.3 m/s)
Crew: 1
Capacity: 3 or 4 passengers
Price: $12,500
Built for Civilian Pilot Training Program as navigational trainer
F designates use of flaps
21 built

YKS-6
Date: 1936
Engine: Jacobs L-4, 225 hp (168 kW)
Length OA: 25’4″(7.72m)
Span (upper): 33’3″(10.13m)
Span (lower): 28’3″(8.61m)
Maximum Speed: 144 mph (232 km/h)
Empty weight: 1,809 lb (821 kg)
Max gross weight: 3,250 lb (1,474 kg)
Maximum load: 1,441 lb (654 kg)
Price: $4,995

YKS-7
Date: Feb 1937
Engine: Jacobs L-4M/MB, 225 hp (168 kW)
Length OA: 25’3″(7.70m)
Span (upper): 33’3″(10.13m)
Span (lower): 28’3″(8.61m)
Empty weight: 1,882 lb (854 kg)
Max gross weight: 3,250 lb (1,474 kg)
Maximum load: 1,368 lb (621 kg)
Maximum Speed: 146 mph (235 km/h)
Cruise speed: 130 mph
Stall: 50 mph
Range: 590 mi
Seats: 4-5
Price: $5,695

ZKS / ZKS-6
Engine: Jacobs L-5, 285hp
Wingspan: 33’3″
Length: 25’4″
Seats: 4

ZKS-6
Engine: Jacobs L-5, 225 hp (168 kW)

ZKS-7
Engine: Jacobs L-4, 225 hp (168 kW)

ZKS-7
Date: Feb 1937
Engine: Jacobs L-5, 285 hp (213 kW)
Length OA: 25’3″(7.70m)
Span (upper): 33’3″(10.13m)
Span (lower): 28’3″(8.61m)
Empty weight: 1,928 lb (875 kg)
Max gross weight: 3,250 lb (1,474 kg)
Maximum load: 1,322 lb (600 kg)
Maximum Speed: 153 mph (246 km/h)
Cruise speed: 136 mph
Stall: 50 mph
Range: 560 mi
Seats: 4-5
Price: $6,135