Every pilot has several images
stored up, which he or she
projects on their mind's eye
from time to time as a way of
remembering a wonderful moment.
The one I replay the most is the
image and feeling of dropping
the hammer on my first Bearcat
takeoff. The acceleration was so
sudden and all-encompassing it
felt as if it was launching me
through some sort of space
continuum and I'd emerge on the
other side a different person.
In fact, I did emerge a
different person. It changed my
way of looking at airplanes
forever.
Every takeoff
since that first Bearcat
experience has been a
comparison, another step in the
search for the same
exhilaration. Until this week,
only one airplane has come even
close, the Grumman F3F/G-32A.
And then I
flew Jim Younkin's Mullicoupe
last week. Now there's another
image to rotate through my
mental theatre with those of the
Bearcat and the F3F. The
Mullicoupe definitely left it's
mark.
Any who were
at Oshkosh undoubtedly came away
with stories of the two hulking
red and black airplanes that
were "...sorta Monocoupes and
sorta Howards." A spectator
didn't have to know what the
airplanes were to know they had
just seen magnificent examples
of the airplane builder's art.
If they hung around long enough
to pick up the specifics, they'd
realize those were Bud Dake's
and Jim Younkin's Mullicoupes,
just two more in a long, long
line of nearly unbelievable
flying machines to bear
Younkin's unique touch.
It's probably
redundant to once again explain,
or try to explain, Jim Younkin
who operates Historic Aviation
in Springdale, Arkansas, as he's
regularly mentioned in these
pages. However, it is very
necessary to point out that he
is far more than simply a
builder, or a designer or a
creative thinker, even though in
each of those categories, he may
well stand at, or near, the head
of the class. Younkin's
combination of talents may well
make him unique in our field.
There are a number of others who
can free form aluminium nearly
as well. There are others who
are adept at designing and
engineering. There are numerous
shops out there that build and
restore airplanes as well. There
are very few, however, who, like
Jim, combine it all.
Quite often,
when an individual has the above
kinds of characteristics, he is
likely to be selfish with what
he knows. Just the opposite is
true with Younkin. Walk in his
shop with a question and he's
likely to drop what he's doing,
step over to the trip hammer or
English wheel and show you how
it's done. He's almost zealous
in his urge to get knowledge and
understanding about what he's
doing out to other people. His
much-modified Piper Pacer is a
classic case in point: It's hard
to imagine how many other Pacer
owners have borrowed ideas from
Jim's airplane, most with his
help. It's probably the most
copied airplane of its type
ever, although he often doesn't
receive credit for some of the
mods.
Jim is
blessed with the intellect and
the skills that are required to
take any idea and make it a
reality. For that reason, when
he starts musing about a
particular restoration project
or new design, it's a good idea
to sit up and take notice. Jim
Younkin's day dreams almost
always become reality. That's
exactly how the Mullicoupes came
to be.
Actually,
Younkin blames Bud Dake, he of
the familiar menacing black
Clipwing Monocoupe and central
figure in the on-going Creve
Couere aerodrama, for the
Mullicoupes coming to be.
Younkin had
taken Mr. Mulligan, his 600 hp
recreation of the golden age
racer, to the antique fly-in at
Blakesburg for the first time
("...I didn't really plan on
landing, as it was way too
short, but there the runway was,
so..."). Towering over so many
of the other antiques, it was
the center of attention. The
year was 1982. He and Bud Dake
were sitting in the shade
admiring the airplane's lines
that afternoon when, according
to Younkin, Dake said something
to the effect of, "...you know
what we really need is a 450 hp,
two seat version of Mulligan
just for personal
transportation..." Younkin
agreed.
As Younkin
remembers it, they talked about
it for a couple of days at the
fly-in, deciding such an
airplane should borrow heavily
on the lines of the Monocoupe.
Jim says that's when the name "Mullicoupe"
came into being.
When Younkin
came home he started doodling.
Jim Younkin, however, doesn't
doodle like the rest of us. His
doodles have numbers and
dimensions attached. So, in
another year or two a totally
accurate scale model of the
airplane took shape in Younkin's
shop. He had the concept. He had
the dimensions, so he did the
next natural thing and started
cutting metal.
At that point
he was building a single
airplane for himself, but it
wasn't long before Bud Dake and
Red Lerille, another Monocoupe
fanatic, had jumped on board.
So, when Jim built a component
for his airplane, he'd build one
for theirs as well.
For a number
of years the Mullicoupe was a
"fill-in" project as Younkin's
shop was completely immersed in
a Staggerwing Beech assembly
line. At one time he had four
Staggerwings lined up, each
receiving massive amounts of
restoration, modifications and
aluminium work.
Finally,
several years ago, the
Staggerwings were finished to
the point they were ready to be
delivered to the owners, and the
Mullicoupe project really got
serious.
As quickly as
Younkin would finish a
component, it would be shipped
to Dake and Lerille and the race
was on to see who would fly
first. Dake won.
On the first
flight, they discovered the
airplanes needed much larger
vertical fins. The tiny surface
which was desired to maintain
the Monocoupe look just wasn't
large enough. Younkin produced
larger surfaces for his and
Lerille's airplanes, but Dake,
true to his nature, was
beginning to like an airplane
that had little or no airborne
directional stability so he
hasn't modified his.
The final
airplanes are a little daunting
both in presence and in
specifications. From a distance,
it would be easy to mistake them
for D-145 Monocoupes. As the
distance is closed, however,
they grow in size until it's
realized they are very serious
airplanes. The lines start with
the flawless bumped aluminum
cowls wrapped tightly around a
fuel injected P & W R-985. The
lines flow back with more
Monocoupe than Mulligan in them
until they wasp-waist their way
down to the tiny tails. The
wings are very much Mulligan in
both line and execution.#
The 29'3"
wings look short for the
dense-looking fuselage and in
fact are short: The wing loading
goes from 24 to 27 pounds/square
foot, depending on how much of
the 150 gallon gas tanks are
filled. Even with the 22 gph
fuel burn of the Pratt and
Whitney, that gives a solid (and
impressive) 7 hours of range at
a high altitude cruise speed of
225 mph.
I was more
than just a little apprehensive
as I backed up to the door to
hoist myself up into the cockpit
(the door jam is nearly chest
high). The airplane has a
pugnacious presence about it
that just sitting on the ground
says "fly me if you can." Bobby
Younkin, Jim's son and the well
known airshow pilot of both a
Twin Beech and Samson, scrambled
into the other seat to help make
the introductions.
Once inside
the airplane, the extreme deck
angle, 15°, was clearly evident.
The cockpit slanted downhill
much steeper than any airplane
I'd ever flown. This was going
to be a challenge.
When the
engine cranked, it caught on
only the second or third blade
laying down the wonderfully
classic opening movement of
Symphony de Round Motore.
The airplane
doesn't have a steerable
tailwheel, so most ground
handling is done with brakes. I
had only a short, five foot wide
stripe of the side of the
taxiway visible at an extreme
down angle, so I was at first a
little overly cautious. I found
quickly, however, that the nose
tapered fast enough that by
leaning against the side of the
cockpit, I could actually see a
fair distance ahead and only a
slight S-turn was necessary to
clear the taxiway ahead.
The cockpit
has an open cheery feel to it
because of the sky light but the
feeling is also helped by the
antiquey, vaguely triangular
instrument panel. If the panel
hadn't been scooped out at the
sides and had a round top like
most instrument panels, the
visibility to the quartering
sides would have been abysmal.
As it was, I had a clear view at
an angle of about 40° (a guess)
off the nose.
As I glanced
around the cockpit I again
remembered Younkin's description
of the fuel system. The tank
selector is between the seats,
along with the push-pull
tailwheel lock. What is not
visible is the float and vent
system in the header tank.
R-985's with fuel injection,
rather than the usual carburetor,
take a frighteningly long time
to restart once you've run a
tank dry. Sometimes the silence
lasts as long as 20 seconds.
Younkin's fix for that is a low
fuel warning light in the header
tank that lets you know you've
only got a few gallons left
before the pilot light goes out.
At the same time, the float
activates a servo which opens a
direct vent into the header tank
so, when you switch tanks, it
will fill faster. If, for some
reason, the servo doesn't
activate, there's a tiny spigot
over the co-pilot's head that
manually opens the vent for
faster filling.
As we rolled
out and centred ourselves on the
runway, I could see it was going
to be a real challenge to
actually get the airplane into
three point position on landing.
At that point, I didn't know
exactly how much of a challenge
it would be.
I also didn't
know how exhilarating the
takeoff would be. At our weight,
the power loading was down
around 5.2 pounds per horsepower
which is about on a par with the
lighter aerobatic specials. But
that number doesn't take into
account the effect of having
nearly 1000 cubic inches feeding
that big prop.
I fixated on
the furthest point where the
edge of the runway hit the nose
and started easing the power in.
The airplane responded by
instantly leaping forward. When
I saw the airplane wasn't going
to go darting off one way or the
other, I finished putting the
rest of the power in and hung
on. I was just in the process of
picking up the tail when the
airplane got light on its feet
and I was slow to react to the
message. The result was we
didn't separate cleanly and I
let a slight crosswind push us a
little.
Gheez! I was
thinking. Gimme a break. I
hadn't caught up with the
airplane yet and it was ready to
takeoff long before I was.
I glanced at
the airspeed as we left the
ground and was amazed! We were
rocketing through 110 mph and I
had just barely gotten full
power in.
I brought the
power back to climb settings
immediately and held what I knew
was a fairly shallow climb
angle. This seemed a smart thing
to do around an airport. It was
obvious the Mullicoupe would
sustain any nose angle I wanted,
but I'd be blind as a bat in a
bucket. With everything all
squared up, I again checked the
airspeed. We were indicating 160
mph on a very hot, humid day but
the VSI was showing 1800 fpm!
How's that for a cruise climb,
sports fans?
Through out the entire takeoff
and climb out, the world didn't
exist out the other side of the
airplane. The width of the
cockpit and the bulk of the nose
conspired to shut that part of
the world out of my view. As the
nose came down, the view
improved dramatically, but the
very top of the cowling was
still slightly over the horizon
and it was hard to see out the
other side. That, however, is
just the way old airplane are
and, as far as the Mullicoupe
crew is concerned, what they
have built is a new, old
airplane.
The concept
from the very beginning was that
they would take up where Benny
Howard had left off with the
Mulligan and do it they way they
would have done it in those
days. As we rumbled across
Arkansas at 5,000 feet and
205-210 mph TAS, it looked to me
as if Benny would be proud to
have his name associated with
the Mullicoupe.
Jim told me
Bud Dake had conducted
exhaustive tests at 11,000 and
determined the airplane's best
cruise speed was indeed 225 mph
at 22 gph. This is only 5 mph
slower than the Mulligan after
which it was patterned. Younkin
also said the airplane really
needs a 12:1 blower drive rather
than the stock 10:1 which would
make it much more efficient at
higher altitudes.
The controls
are much better than any
Monocoupe I've ever flown.
Actually, they are better than
any Howard's (with the possible
exception of Mr. Mulligan).
There is no way to describe them
other than they are "normal."
The break-out force around
neutral is just about right and
the aileron pressure goes up
slightly with displacement
(positive gradient). The
response is better than a modern
Cessna and on a par with a new
Beechcraft.
Rudder is
extremely powerful and it took a
while to get my feet toned down
so I wasn't slamming the ball
around. Younkin has a locking
bar for the rudder which locks
it straight ahead for cruise
which adds it's area to the fin
thereby making the airplane more
directionally stable in cruise.
I brought the
power back and started setting
up for a clean stall. I was
doing fine until we got down to
around 110 (we'd been indicating
around 195 mph). Then the
airplane didn't want to slow
down any more and I was out of
trim. I keep pulling, the VSI
kept going down, and eventually
we started shedding excess
speed, but it was a struggle.
Finally, down in the low 80 mph
range, the stick came against
the stop where I held it to see
what would happen. The airplane
mushed ahead and nothing
happened.
Then I
started playing with the flaps.
The flaps are another Younkin
original and are beautiful the
way they work. They are true
Fowlers, but he's been able to
keep the entire track within the
wings surface. They track back 5
1/2" before they go down more
than a few degrees. He considers
half flap to be about 10° or so.
That amount of movement takes up
about 80% of the track length.
The final percentage of travel
cranks them down 30° quite
quickly.
The flap
controls are two switches. One
is a traditional three position
momentary switch that can be
used to select any flap
position. It can be paired with
a second switch marked "1/2" and
"full." With that switch in the
"1/2" position, slapping the
power switch all the way down
gives only half flaps. Then,
when you're ready, you can just
push the position switch down to
"full" and that's what you get.
They hadn't
finalized their flap speeds when
we flew the airplane but they
were using 110 mph for half
flaps and 100 mph for full.
Getting slow enough to get full
flaps was the biggest challenge
of the flight. Half flaps gives
almost no drag and the airplane
doesn't want to slow down. Also,
we were nearly out of trim at
that point so stick pressures
were building. As soon as the
rest of the flaps went out,
however, all was right with the
world and the airplane was
perfectly willing to sit at 100
mph with very little help from
me.
I had
expected the full-flap stalls to
be much more pronounced, but
even tugging the stick into my
lap and holding it there
produced little more than a
bobbing mush in the low 70's
mph. As the airfoil is the tried
and true 23012, I'd expected a
sharper break. We didn't
investigate accelerated stalls
which I suspect may have been
sharper.
I let Bobby
shoot the first landing, which
was a tail-low wheely. I made
the second approach with no
intent of actually landing. I
just wanted to get the feel of
the airplane in approach, so I
flew it into ground effect and
added just enough power to keep
us skipping along the ground
after a brief touchdown while I
tried to develop some
references. Throughout approach,
the runway was clearly in view
but it disappeared the second
the nose was brought up. If a
person isn't used to flying
blind airplanes, this airplane
is going to be something of a
shock. However, the side of the
runway is clearly visible
because of the way the
windshield wraps so far down the
side of the fuselage.
On my next
approach, I resolved to try for
a three-point. I wrestled it
down to 100 mph, got the flaps
out and made a curving intercept
with centerline. Runway
disappears behind the nose as I
begin pulling and then pulling
some more. Then I felt the mains
touch long, long before I was
ready for them, so I nailed it
on in a wheel landing. It
probably looked okay from the
outside, but it wasn't what I
wanted.
With it's
running on the mains, only a
little more of the runway is
visible, but it is so well
behaved it doesn't make any
difference. The tail came down
and the airplane still tracked
straight. No sweat. Power up
more firmly this time. I was
beginning to get comfortable and
was enjoying the takeoffs. What
a blast!
Okay, I was
telling myself. Next time
around, I'm getting the
three-point position and nailing
it on. Curving approach, good
speed, good position. I spot the
side of the runway and start
trying to hold it off. Ground
effect wasn't helping me much so
I was working hard at rotating
fast.
I wasn't fast
enough. As I was pulling and we
were in what I thought was a
three-point attitude, we
ricocheted off the mains, this
time leading into a healthy
skip. It was one of those,"...do
I or don't I add power?",
marginal situations. I opted not
to add power. That was a
mistake. As the airplane started
back down, I increased the back
pressure only to find the stick
was already against the stop.
The mains touched and bounced,
then the tailwheel touched and
bounced. Then the mains came
down again, then the tailwheel.
I've got the stick nailed to my
belly and all I can do is sit
back and watch a spectacularly
ugly crow hop landing.
The good news
was that at no time did the
airplane want to do anything but
roll straight ahead, nor did it
unload and actually drop us
hard. The only bad result was
severe embarrassment for me. If
I'd just touched the power on
the first hop we'd have been
okay. After that, it was too
late.
By the time
I'd taxied back to the hangar,
I'd thought about the entire
process enough and was ready to
go at it again. This is an
airplane I'd really enjoy
getting good in. Not to mention
the adrenaline rush every time
the throttle went in.
The three
Mullicoupes now flying are
likely to be the only ones ever
to be flying. Although Younkin
has been approached by several
people wanting him to build
components for them, he hasn't
decided he really wants to do
that.
The
Mullicoupe is definitely not
everyone's airplane. But for
those drawn to nostalgia and who
love round motors and serious
performance, this could very
well be the answer to a dream.
Who knows? Maybe Jim will relent
and open the doors to others
wanting a taste of Howard's
legacy as interpreted by Jim
Younkin. If not, at least the
rest of us can admire them from
the sidelines.
A
Short Hop With Mr. Mulligan:
When Benny Howard designed and
built Mr. Mulligan in the late
1930's there would be no way he
could have imagined it being
replicated 60 years after the
fact. When Jim Younkin arrived
at Oshkosh with his near-perfect
replica it blew minds right and
left.
When Younkin,
Bud Dake and Red Lirille decided
to build the Mullicoupes it was
with the goal of building a
better Mr. Mulligan in smaller
scale. So, when Jim offered me
the chance to fly Mulligan, I
felt it was important to my
scientific research that I force
myself to take the time to
accept his invitation. Yeah,
right! I'd wanted to fly the
airplane since the first time I
saw it. Besides, it really was
important I sample what had set
the Mullicoupes in motion.
Both Dake and
Younkin have said they feel as
if they fell short of their goal
to better the Mulligan.
On the first
takeoff, the first thing I
noticed was how much better I
could see out of the Mulligan.
Better, however is a relative
term as most people would still
think it blind as a post hole.
Also, I had
no trouble saying up with the
airplane and getting it solidly
on its mains before it caught me
unawares. That may be because
I'd just stepped out of the
Mullicoupe or because the
airplane, with a wing loading in
the mid 30 pounds per square
foot range, so was solid.
In terms of
pure performance, the Mullicoupe
appears to have the edge in
climb but the Mulligan is much
faster at low altitudes. We were
indicating 205 mph (230 mph TAS)
where the Mullicoupe was showing
190-195 mph. Of course the
Mulligan was also burning 33
gallons as opposed to the
Mullicoupe's 22 gph.
Where I did
notice the difference was the
control feel. The Mulligan's
ailerons are much quicker and
smoother. In fact, they were
flat-out lovely. The rudder,
however, was one of the most
sensitive I've ever touched.
In cruise the
Mulligan was a solid as a brick
building, a feeling that
continued right down into
approach. With full flaps and
100 mph showing, the airplane
was dead simply to gently hold
off before putting it on the
mains. Once down, it was solidly
down with no tendency to hop or
porpoise. Some people have ask
whether it was like landing a
Howard DGA-15P, which it
resembles and the answer is an
unequivocal no. The Mulligan's
gear is much stiffer and the
airplane's easier to land. Any
similarity to a DGA-15 is
strictly cosmetic, as the
Mulligan's character is so much
more refined and precise.
After flying
the Mullicoupe, when you hear
Dake and Younkin express
negatives about the airplanes,
you have to think they're out of
their collective minds. After
you've flown Mr. Mulligan, you
begin to understand where
they're coming from.
The
Mullicoupe is a helluva
airplane. Mr. Mulligan is the
daddy of that airplane and it
shows.