# Brock Avion

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American homebuilt aircraft

Avion General information Type Ultralight aircraft National origin United States Manufacturer Ken Brock Manufacturing Status Production completed

The **Brock Avion** (English: airplane) is an American [ultralight aircraft](/source/Ultralight_aircraft) that was designed and produced by [Ken Brock Manufacturing](/source/Ken_Brock_Manufacturing), a company usually noted for its [gyroplanes](/source/Gyroplane). The Avion was supplied as a kit for [amateur construction](/source/Homebuilt_aircraft).[1]

## Design and development

The aircraft was designed to comply with the US [FAR 103 Ultralight Vehicles](/source/FAR_103_Ultralight_Vehicles) rules, including the category's maximum empty weight of 254 lb (115 kg). The Avion has a standard empty weight of 240 lb (109 kg). The Avion features a [strut-braced](/source/Strut-braced) [high-wing](/source/High-wing), single-seat, open cockpit, single [pusher](/source/Pusher_configuration) engine configuration, and is equipped with [tricycle landing gear](/source/Tricycle_landing_gear).[1][2]

The aircraft is made from bolted together [aluminum](/source/Aluminum) tubing, with the [wing ribs](/source/Wing_rib) constructed from stamped aluminum. The wing and tail covering is [Dacron](/source/Dacron) sailcloth. Its 34 ft (10.4 m) span wing is supported by "V" [lift struts](/source/Lift_strut). The tail is mounted to a straight aluminum tube that passes above the pusher propeller. Both the [elevator](/source/Elevator_(aircraft)) and [rudder](/source/Rudder) are [all-flying](/source/Stabilator) surfaces; the [ailerons](/source/Aileron) are full-span. The standard engine fitted was the [Rotax 277](/source/Rotax_277) of 28 hp (21 kW). The fuel tank was integral with the pilot's seat and common with Brock's gyroplane designs. The pilot sits on the seat in the open air, with no windshield. The [landing gear](/source/Landing_gear) is of tricycle configuration and features a steerable nosewheel and hydraulic brakes. The Avion can be assembled for flight in 30 minutes.[1]

The Avion underwent a complete engineering [stress analysis](/source/Stress_analysis) by [Bob Hovey](https://en.wikipedia.org/w/index.php?title=Bob_Hovey&action=edit&redlink=1), the designer of the [Hovey Delta Bird](/source/Hovey_Delta_Bird) and [Hovey Whing Ding II](/source/Hovey_Whing_Ding_II). The Avion was designed to +6/-4[g](/source/G-force).[1]

## Specifications (Avion)

*Data from* Cliche[1]

**General characteristics**

- **Crew:** one

- **Wingspan:** 34 ft 0 in (10.36 m)

- **Wing area:** 145 sq ft (13.5 m2)

- **Empty weight:** 240 lb (109 kg)

- **Gross weight:** 455 lb (206 kg)

- **Fuel capacity:** 5 U.S. gallons (19 L; 4.2 imp gal)

- **Powerplant:** 1 × [Rotax 277](/source/Rotax_277) , 28 hp (21 kW)

**Performance**

- **Maximum speed:** 52 mph (84 km/h, 45 kn)

- **Cruise speed:** 48 mph (77 km/h, 42 kn)

- **Stall speed:** 27 mph (43 km/h, 23 kn)

- **g limits:** +6/-4

- **Rate of climb:** 700 ft/min (3.6 m/s)

## References

1. ^ [***a***](#cite_ref-Cliche_1-0) [***b***](#cite_ref-Cliche_1-1) [***c***](#cite_ref-Cliche_1-2) [***d***](#cite_ref-Cliche_1-3) [***e***](#cite_ref-Cliche_1-4) Cliche, Andre: *Ultralight Aircraft Shopper's Guide* 8th Edition, page E-3. Cybair Limited Publishing, 2001. [ISBN](/source/ISBN_(identifier)) [0-9680628-1-4](https://en.wikipedia.org/wiki/Special:BookSources/0-9680628-1-4)

1. **[^](#cite_ref-2)** Berger, Alain-Yves and Norman Burr: *Berger-Burr's Ultralight and Microlight Aircraft of the World*, Volume 16, page 173. Haynes Publishing Group, 1983. [ISBN](/source/ISBN_(identifier)) [0-85429-390-6](https://en.wikipedia.org/wiki/Special:BookSources/0-85429-390-6)

## External links

- [Photo of a Brock Avion](https://web.archive.org/web/20120402000415/http://www.rotaryforum.com/forum/attachment.php?attachmentid=5360&d=1097166426)

v t e Ken Brock Manufacturing aircraft Ultralight aircraft Avion Gyroplanes KB-1 KB-2 KB-3

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Adapted from the Wikipedia article [Brock Avion](https://en.wikipedia.org/wiki/Brock_Avion) by Wikipedia contributors ([contributor history](https://en.wikipedia.org/wiki/Brock_Avion?action=history)). Available under [Creative Commons Attribution-ShareAlike 4.0 International](https://creativecommons.org/licenses/by-sa/4.0/). Changes may have been made.