Welcome to McMullan Aircraft Design!


Our Mission

To design safe, comfortable, high performance aircraft that are affordable to build, fly and maintain.

The Vortex started it all for me. I spent thousands of hours studying everything I could about airplanes. I wanted to design an airplane that would comfortably seat a pilot and three passengers plus their baggage. The plan was to use a Chevrolet LS-1 V8 engine with a prop speed reduction unit. This engine easily turns out 350hp. I also wanted an airplane that would be fast in cruise and could hold enough fuel to take some long trips. The Vortex Magnum has a welded steel tube fuselage with fiberglass panels. The wing is all composite.

Construction Materials and Information

‚ Steel tube fuselage with fiberglass shell gives excellent aerodynamics, light weight and safety

‚ Full composite wing

‚ Spring aluminum main gear drilled for brake lines

‚ The Vortex Magnum can be built as a taildragger or with tricycle gear

‚ Designed to be used with Chevrolet's 350hp LS-1 engine and PSRU

‚ Designed for the NASA/Langley Natural Laminar Flow airfoil NLF-0215

‚ Long range fuel tanks in the wings for extended range cruising

‚ Castoring nose wheel

Click Here Click Here to see drawing of the fuselage structure

Wingspan 33 ft Fuselage Length 25 ft
Wing Area 164 ft2 Fuselage Height 7.5 ft
Aspect Ratio 6.73 Fuselage Width 53 in
Wing Loading 19.2 lbs/ft2 Empty Weight 1500 lbs
Fuel Capacity 80 Gallons US Gross Weight 3000 lbs

Calculated Performance Specifications

Calculations are based on the 350 hp Chevy 350 cubic inch engine with prop speed reduction unit. Calculations are computer based and may vary with each individual aircraft.

Max Speed @ 5500 ft msl 242 mph Cruise Speed @ 5500 ft msl 225 mph
Stall w/Flaps 61 mph Rate of Climb Sea Level 1,156 fpm

To the left is a drawing of a typical horizontal tail rib. Each one is cut from 1/8" birch plywood.
To the right is a drawing of the horizontal tail in construction, with some of the fiberglass spar caps in place, before sheeting.
To the left is a closeup showing the aluminum spars and elevator hinge.

All information, images, photos, etc. unless otherwise noted are ©
by Jay S. McMullan. DO NOT copy in any form without the written, expressed
permission of Jay S. McMullan and/or his designees. All information contained
on this website or in any publication written by Jay S. McMullan is strictly
for entertainment purposes only! Use at your own risks!