Head-on view of the Dragonfly re-engined with two Menasco B4s driving large diameter propellers. The aircraft's tail is raised on a trestle.

Самолёты на фотографии: Aircrafts on the photo: Crouch-Bolas Dragonfly - СШАUSA - 1934

The Crouch-Bolas Dragonfly after receiving a new paint scheme, redesigned nose section providing an enhanced forward view, and a tailwheel in place of the original skid.

Самолёты на фотографии: Aircrafts on the photo: Crouch-Bolas Dragonfly - СШАUSA - 1934

Crouch-Bolas Dragonfly of 1934 in its original form powered by a pair of Bolas-designed Dragon IV-Gs. Note the four-bladed cooling fans in the lower engine cowlings and the original-style nose section.

Самолёты на фотографии: Aircrafts on the photo: Crouch-Bolas Dragonfly - СШАUSA - 1934

Three-view of the Crouch-Bolas B-40 Pursuit monoplane project.

Самолёты на фотографии: Aircrafts on the photo: Crouch-Bolas Dragonfly - СШАUSA - 1934

In this three-view drawing of the Crouch-Bolas Dragonfly, the downward tilt of the engines is apparent. Over 70% of the total wing area was covered by propeller slipstream.

Самолёты на фотографии: Aircrafts on the photo: Crouch-Bolas Dragonfly - СШАUSA - 1934

Three-view drawing of the projected Bolas B-37 Speed Ranger passenger transport.

Самолёты на фотографии: Aircrafts on the photo: Crouch-Bolas Dragonfly - СШАUSA - 1934

Harold Bolas standing in front of Parnall Elf G-AAFH.

Самолёты на фотографии: Aircrafts on the photo: Parnall Elf - ВеликобританияUnited Kingdom - 1929

First design by Harold Bolas for Parnall and Sons was the Panther naval spotter-reconnaissance biplane of 1918.

Самолёты на фотографии: Aircrafts on the photo: Parnall Panther - ВеликобританияUnited Kingdom - 1918

Bolas' unique method of splitting the fuselage for ease of deck stowage, the air flotation bag visible in the opening of the rear section. Note the Parnall constructor's number P.707 beneath this sixth prototype Panther's serial N.96.

Самолёты на фотографии: Aircrafts on the photo: Parnall Panther - ВеликобританияUnited Kingdom - 1918

AD Flying-Boat N1525 of 1916, a design in which Harold Bolas was involved together with Clifford W Tinson and Harold Yendail.

Самолёты на фотографии: Aircrafts on the photo: A.D. Flying Boat - ВеликобританияUnited Kingdom - 1916

Bolas carried out detail work on the AD Navy Plane, circa 1916-1917.

Самолёты на фотографии: Aircrafts on the photo: A.D. AD.1 Navyplane - ВеликобританияUnited Kingdom - 1916

Two/three-seat naval reconnaissance biplane for use as a landplane or seaplane with a 450hp (335kW) Napier Lion V 12-cylinder, broad-arrow, water-cooled engine - one built, N202.

Самолёты на фотографии: Aircrafts on the photo: Parnall Pike - ВеликобританияUnited Kingdom - 1927

Single-seat biplane shipboard fighter with wheels or alternatively twin floats, powered by a 495hp (369kW) Rolls-Royce F.XI 12-cylinder Vee liquid-cooled engine. Two built, N232 (illustrated) and N233.

Самолёты на фотографии: Aircrafts on the photo: Parnall Pipit - ВеликобританияUnited Kingdom - 1928

High-wing monoplane, a two-seat experimental and research aircraft for testing various wing incidences, slots and high-lift aids, powered by a 226hp (168kW) Armstrong Siddeley Lynx IV seven-cylinder supercharged radial. Two built, K1228 (illustrated) and K1229.

Самолёты на фотографии: Aircrafts on the photo: Parnall Parasol - ВеликобританияUnited Kingdom - 1929

Two-seat biplane trainer for the Royal Navy with a 270hp (201kW) Rolls-Royce Falcon III - one built, N217.

Самолёты на фотографии: Aircrafts on the photo: Parnall Perch - ВеликобританияUnited Kingdom - 1926

Two-seat civil sporting biplane initially powered by an 80hp (59kW) Annstrong Siddeley Genet II five-cylinder radial, and later a 65hp (48kW) Pobjoy P seven-cylinder radial. Illustrated is Bolas beside the only example, G-EBTE, in 1927. Here powered by an 80hp (59kW) Armstrong Siddeley Genet II air-cooled radial. The upper wings featured a pronounced sweepback but the lower wings were straight.

Самолёты на фотографии: Aircrafts on the photo: Parnall Imp - ВеликобританияUnited Kingdom - 1927

Puffin N138 was the last of three built.

Самолёты на фотографии: Aircrafts on the photo: Parnall Puffin - ВеликобританияUnited Kingdom - 1920

Intended as a postal aeroplane, the Possum triplane featured a center-mounted Napier Lion engine driving twin propellers via extension shafts and gearing. Illustrated is the prototype, J6862.

Самолёты на фотографии: Aircrafts on the photo: Parnall Possum - ВеликобританияUnited Kingdom - 1923

The one and only Parnall/Cierva C.10, J9038, at Yate early in 1928, shortly after completion.
In 1927 Parnall built the C.10, it was powered by a 70hp (52kW) Armstrong Siddeley Genet I radial. The C.10 was intended for military trials and given the serial number J9038.

Самолёты на фотографии: Aircrafts on the photo: Cierva/Parnall C.10 / C.11 - ВеликобританияUnited Kingdom - 1927

Bolas designed the fuselage, nose and tail unit for the C.11, also known as the Parnall Gyroplane. Powered by a 120hp (89kW) ADC Airdisco eight-cylinder vee-configuration engine, it was civil registered as G-EBQG. This crashed at Yate in 1928 with Juan de la Cierva himself at the controls. It was rebuilt and modified but was not sucessful. It ended its days as an instructional airframe at Hamble, Hampshire.

Самолёты на фотографии: Aircrafts on the photo: Cierva/Parnall C.10 / C.11 - ВеликобританияUnited Kingdom - 1927

Harold Bolas was greatly involved with development of the Cierva W.11 Air Horse. The prototype was VZ724 (later G-ALCV), here at Eastleigh in 1948.

Самолёты на фотографии: Aircrafts on the photo: Cierva W.11 Air Horse - ВеликобританияUnited Kingdom - 1948

Another design from Cierva, to which Harold Bolas contributed his expertise and knowledge was the Cierva W.14 Skeeter 1, G-AJCJ. The design was developed by Saro into its updated Skeeter.

Самолёты на фотографии: Aircrafts on the photo: Cierva/Saunders-Roe W.14 Skeeter - ВеликобританияUnited Kingdom - 1948