The saga of the Custer
Channelwing is probably the most interesting of all V/STOL aircraft. It
is without doubt, the oldest ongoing saga in aviation. This is the
story of a single minded man on a single minded mission to change the
path of aviation. Years of research, tests by every conceivable variety
of agency, and stunning flying examples, didn't add up to commercial
production of the Channelwing. It isn't that the Custer wouldn't
perform, it was rather, that maybe it performed unbelievably well, with
the accent on unbelievable.
Willard Custer made many claims for the Channelwing, including the
discovery of new lift principles, which he called, "aerophysics". Most
engineers, cynics and parents, know you can't get something, for
nothing. So when Custer claimed 8.2 pounds of static lift per
horsepower, with a simple fixed wing aircraft, critics scoffed and
tended to look the other way. But, Custer was persistent to say the
least. In time, he was back, claiming 13.8 pounds lift per horsepower,
vertical capabilities, fighter like speed, simple construction, and
heavy load capacity, beyond anything built to date. He also hinted that
the university academia and manufacturers didn't know what they were
talking about when they criticized the Channelwing, and needed to be
re-trained to understand his new theories of lift. It was obvious by
this time that he was a crackpot inventor, untrained in the
aeronautical world, and tiresome to listen to.
Custer was dumped into the dustbin of aviation history for obvious
reasons. So obvious, in fact, that no one stopped to notice that, for
the most part, he was right.
CCW-5 five seconds into takeoff run. This aircraft can be seen at the
Mid Atlantic Air Museum, in Reading, Pennsylvania.
The idea
of the channelwing pre-dates most of those who are reading this site.
It all began in the 1920s, when Willard Custer took shelter in a barn
during a near hurricane velocity storm. Much to his surprise and
fascination, the roof of the barn suddenly lifted off, and soared
through the air. He wondered why an airplane had to gather speed on a
runway, while a barn roof, a poor airfoil by any reckoning, could fly
from a standing start. He soon came to the realization that it was ,the
speed of the air, over the surface, not the speed of the surface
through the air that created lift. Bernoulli principle in both cases,
but an application that had eluded aviation up to that time. He settled
on the idea of pulling the air through channels that were, in fact, the
lower half of a venturi. He was reversing the normal method of powered
flight. Instead of using the engines to move the airfoil through the
air, he used the engine to move the air through the airfoil. His
channel had the effect of going several hundred miles per hour, due to
the induced air flow, while standing still. The airflow over the
surface of the channel created conventional lift, and a lot of it. It
was at this point that Custer settled on," It's the speed of the air,
not the airspeed", which became his mantra of, "aerophysics".
Many experiments followed with all nature of devices. The first real
aircraft to which he applied his principle, was the CCW-1, or Custer
Channelwing number one, which now hangs at the Garber facility of the
Smithsonian. It is still strangely modern, even after all these years,
with a smoothly rounded fuselage, and a wrap around Plexiglas canopy.
But, close inspection reveals the channels appended with two by four
struts. Two 75 HP engines were fitted into the two six foot diameter
half-barrel like channels, and the tests were started. First flight was
November 12, 1942. The CCW-1 was used for test purposes only, to prove
the concept. More than 300 hours of flight tests did prove that the
Custer not only flew, but was capable of flight without wings. After
the first flights proved stability, the wings were progressively cut
off or had spoilers attached to the point of having no lift from the
wings at all. The test pilot noticed no difference because the channels
furnished all the lift needed! Most of these tests were low, straight
ahead hops. A demonstration took place in Beltsville Maryland for
Brigadier General W. E. Gilmore. Gilmore was noted for his gruff
temperament, but after seeing the demonstration, was excited enough to
place a call to Orville Wright, asking that he come out to witness the
Custer phenomenon. Orville didn't make it, but the plane was placed in
a military test program. The results of these tests proved to be
typical of the many government tests the Channel wing received over the
years. The Army Air Force technical report concluded that the lift
generated by the channels was similar to normal induced lift created by
other wing /propeller arrangements. Although this was a complete
falsification, the damage was done, and Custer was on the defensive.
What they forgot to mention, was that the channelwing created more
static lift than the weight of the test vehicle, and was, in fact,
capable of vertical takeoff! The report stated that the channelwing was
inferior to the helicopter in creating static lift and did not show
sufficient promise of military value to warrant further testing. This
was at a time when every conceivable concept from flying wings to
rocket ships was being tried. The conclusion, both then and now, seems
incomprehensible to say the least. To Custer, it was obvious that the
tests had been too good, and consequently helicopter interests were
pushing him out of the picture. That seems to be the most likely
scenario, as later tests proved the channelwing to outlift helicopters
of the day, with 13.8 pounds of lift per horsepower recorded. Custer
was a good inventor, but a little naive about politics and government
contracts. He also felt that the engineering staff and theorists just
didn't understand the Custer phenomenon, as they didn't understand
"aero physics". But, if faith in the government was dimmed, faith in
himself wasn't. Over the next forty years, he obtained financial
backing for a series of aircraft from CCW-2 to CCW-5. He had enough
data and tests to convince enough investors to bring him near full
production on at least two occasions.
In 1951, he co-operated with the Baumann Aircraft Company, and modified
one of their twin pusher aircraft to a Custer configuration. This was
the CCW-5, and had two 225 HP engines, and weighed en excess of 4300
pounds. Walker Davidson made the first flight of the CCW-5 in July of
1953. As usual, the aircraft was highly successful. Demonstrations
repeatedly showed hair raising maximum performance takeoffs, nose high
climbs at speeds so low it seemed obvious that the Custer would fall
out of the sky. Three second takeoffs, with nose high steep turns of 45
to 60 degrees bank, at speeds below 30MPH gave the CCW-5 the ability to
take off and do a 180 before most planes could lift off. Video of these
flights still confound experienced pilots. Although I have personally
logged 20,000+ hours, in all nature of aircraft, I was absolutely
stunned the first time I saw the videos of the Custer doing a 150 foot
takeoff, roll into a steep bank at speeds that would have insured a
stall - spin - crash, in any other plane, and leave town going the
other way, while staying within what appeared to be about a 250' square
area. Slow flight was a specialty, and the CCW-5 flew at a measured 22
MPH and on August 27, 1954 hovered against an 11 MPH wind, although it
was not modified to use maximum lift potential. Cruise speed remained a
normal 170 mph.
These tests attracted more investors, and it seemed that Custer and
Noordyun Aircraft Ltd. of Canada were going to do a production run of
at least 100 aircraft. On the strength of this proposal, a production
version of the CCW-5 was built and rolled out on July 4 of 1964.
Although it looked like the original Baumann conversion, the second
model was built from scratch, rather than modified from an existing
aircraft. Now came the securities and exchange commission who claimed
the stock was not issued correctly, and the deal fell through, in a
manner reminiscent of the Tucker car.
Since then, the Custer channelwing has virtually disappeared, and few
have even heard of the aircraft, let alone its' questionable
capabilities. |