Hummel Bird
(LSA legal and very efficient)

Introduction to the Hummel Bird

The Hummel Bird is of all metal construction.  Bulkheads are mounted on a simple wood beam, with rivet holes located in flanges of bulkheads, skins are wrapped around and holes drilled back through.  Sheet metal is simplest, fastest and most economical way to build an aircraft as Art Rempel has proven with his building a Hummel Bird and engine in three months building time. Construction is very rugged and

is stressed for 6G's, (5G's with Witman wing tips).

     The complete set of plans contains 26 large (D size) drawings with all bulkheads, wing ribs and skins full size.  A 30 page step by step manual is very complete with all materials listed.  Only simple shop tools are required to build the Hummel Bird tri gear or tail dragger.  Rigid and shock absorbing gear is shown on the plans.  For grass field operation, the shock gear is recommended.  Since this is a short build time and quite simple, it is a good project for first for first time builders.  Average build time is 1200-1400 hrs if built from scratch. Though a complete kit is not available, al of the welded and many of the complex parts are available.

     Flying the Hummelbird is very enjoyable. Turns can be made using very little rudder, as ailerons are differential.  The roll rate is in excess of 250 degrees/sec.  It is light on controls and flies hands off in smooth air. Stall speed, without wing tips is 42 mph power off and as low as 32 mph power on.  There is roll control after the stall which many planes don't have.  With the tri gear, its very easy to land in cross winds--when other planes are being put away because of high winds.

     The 1/2 VW engine has an excellent track record for reliability and fuel economy.  Engine plans or complete engines are available.

Hummel Bird Features and Specs


  • All metal construction
  • 3 mph per hp
  • Short build time
  • Recommended for 1st time builders
  • Fuel economy 1.7gph
  • Small footprint for storage
  • removable wings
  • Stressed for 6 G's

This calculator is set up to find the Center of Gravity. Be sure to use actual measurements and weights when filling in the blanks.


  Modified Clark-Y
HP (range)
Wing Span
5.5-6.4 m 
18-21 ft 
Wing Area
 5.3-5.9 m²
57.2-63.5 ft²  
Wing Loading
48.3-43.4 kg/m²  
9.6-8.6 lbs/ft²  
4.05 m 
 13 ft 4in
Empty Weight
141 kg 
310 lbs 
Gross Weight
250 kg 
 550 lbs
VNE Speed
 233 km/h
145 mph 
160-185 km/h 
100-115 mph 
 68 km/h
42 mph 
Take Off Distance
92 m 
300 ft 
Take Off over 50' Obstacle
 305 m
1000 ft 
Rate of Climb
 122-244 m/min
400-800 ft/min 
Landing Distance
243 m 
800 ft 
Fuel Capacity
22.7 L 
6 gal 
Fuel Consumption
6.1-7.5 L/hr 
1.6-2.0 gal/hr 
"G" Rating

Note- specs are with 170# pilot and 37 hp ½ VW Engine.
No spins/ Low "G" aerobatics