|
Pietenpol
Project
What the heck is a Pietenpol? It's a 1930 open
cockpit designed by Bernard Pietenpol. It is a two place, wood and fabric
ship that cruises about 65 to 75mph.
In 1928, Mr. Pietenpol built and flew an airplane of his own design. The
airplane was a single place open cockpit monoplane made from wood obtained at
the local lumberyard, fittings fabricated from a blacksmith shop, and a covering
of bed sheet material painted with clear varnish. The landing gear was
constructed of gas pipe and motorcycle wheels. The prop was hand-carved from
black walnut and powered by an Ace four cylinder water cooled engine. The
airplane flew very well accumulating over fifty hours in the first two months.
Several design modifications followed during the next five years; however,
the basic design remained unchanged. During the process of modifications, the
airplane became a two place with space for a passenger. The split axle landing
gear with air wheels improved take-off and landing characteristics. The Ford A
engine became the standard power plant turning a 78" x 42" propeller.
The final design and drawings for the Air camper were completed in 1934. No
further changes have been made to the original drawings. The picture shown
is the last one Bernard built and is flying today.
I'm building mine from the 1934 plans. This will definitely
be a LONG TERM project. Take a look at some
of the construction pictures. (double click on picture to enlarge)
 |
 |
 |
 |
| Right elevator |
Right elevator |
Shot weights |
Right elevator |
 |
 |
 |
 |
| Slow but sure! 11-05 |
Cutting more gussets |
Sand on drill press |
Cut out for hinge |
 |
 |
 |
 |
| V Stab tip |
Getting closer |
Ribs |
H Stab and Elev |
 |
 |
 |
 |
| New bench for fuselage |
End ribs w/uprights |
Ribs done!!! |
Web & cap stock |
 |
 |
 |
 |
| 1/12 scarf for web |
Ready to glue |
Top one done, nice! |
Pretty good joint |
 |
 |
 |
 |
| Fir stock for caps |
Ripping & planing |
Many blades later |
Gluing |
 |
 |
 |
![SparSketch[2].jpg (426912 bytes)](SparSketch2_small.jpg) |
| More scarfs, 1 p/cap |
Trial spars, 9mm, 7 ply webs,
5/16x1"+ caps |
Spar drawing |
 |
 |
 |
 |
| C-Section started |
C-Section strap |
Gluing 2" rib cap |
L-rear cabane fitting |
 |
 |
 |
 |
| Starting 2nd bend |
Makeshift brake |
Front cabane fitting |
Cabane fitting & strap |
 |
 |
 |
 |
| Ready to weld |
Front fitting |
Rear Fitting |
Elev & rudder horns |
 |
 |
 |
 |
| Bead roller for horns |
Larger roller |
Harbor Freight 34104 is 18" |
12" model would be big enough |
 |
 |
 |
 |
| Aileron horns |
Horn braces |
Rudder horn brace |
Great weld! |
 |
 |
 |
 |
| Control horn (oversized) |
Welded horns |
Front bearing tacked |
Rear bearing tacked |
 |
 |
 |
 |
| Sticks tacked, will leave final welds
to pro |
Center bearings |
Outer bearings |
Wingtip braces |
 |
 |
 |
 |
| C-section trial fit |
Drilling straps |
Strap ply, don't glue yet |
Pedals started |
 |
 |
 |
 |
| Welded control horn |
C-section cut-out |
Straps done! |
More C-section |
 |
 |
 |
 |
| Left wing started |
From outboard end |
Wingtip Glued |
Four fir plys |
 |
 |
 |
 |
| Clamped tip |
Gluing root doubler |
Comp strut cut-outs |
Comp struts test fit |
 |
 |
 |
 |
| Scarfing 1/16" LE |
Root rib cut-outs |
Additional brace |
Aileron end |
 |
 |
 |
 |
| Cross brace seat |
Must be cut out |
C-section-L-wing test |
Test fit |
 |
 |
 |
 |
| Cutout progressing |
Trailing edge cut out |
X-tra comp struts wing tip |
First coat varnish |
 |
 |
 |
 |
| 2nd wingtip formed |
Mounting hardware |
More hardware |
Tip brace-drag wire |
 |
 |
 |
 |
| Fitting aileron hinge |
Nutplates |
Aileron hinge |
Wow it works |
 |
 |
 |
 |
| Inboard end |
Need more angle on both bearings |
Bottom |
Root rib braces-rear bay |
 |
|
|
|
| Inboard rear bay |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|