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Introduction -
Flying an RV
All performance data presented in this web site
was obtained through repetitive testing with a stopwatch, over measured courses, and with
a calibrated airspeed system. All test figures are corrected to standard temperatures.
You can realistically expect performance at or very
near our published figures.
Absolute speed was never our primary goal.
We did, however, strive to make RVs as aerodynamically efficient as possible, and are
pleased with the results. Top speeds will
range from around 190 mph to over 220 mph, depending on the model and the engine/prop
combination.
One beauty of the RVs high top speed is that,
while it is available, it is not necessary. In other words, because of its low wing
loading, it can cruise efficiently at speeds well below maximum (but still much higher
than most small aircraft) using very fuel efficient power settings.
When flying at lower altitudes "just for
the fun of it", fuel mileage at normal cruise power settings isnt quite as
good. When sightseeing or cruising around the lower part of the sky, we find it enjoyable
to use a 40-50% power setting, yielding a low noise level, smooth engine operation, and
low fuel consumption.
Under standard sea level atmospheric
conditions the takeoff roll at gross weight varies between 300 - 650. At solo
weight, this distance is reduced by as much as 45%. Naturally, larger engines shorten the
takeoff roll and increase climb performance.
This near SuperCub performance may seem academic
when operating from most commercial airports. However, if you enjoy flying into private
airstrips and out of the way recreational areas as we do, this capability is most
worthwhile. An added benefit is good performance at high density altitudes. Many high
speed homebuilts have marginal takeoff performance on hot-and-high airstrips. Not so with
the RVs.
The STOL capabilities of the RVs
allow you to
operate comfortably from all but the most rugged "bush" strips. The RVs
excellent climb rate gives an extra margin of safety when operating from such places. Just
as the RVs have a wide range of practical cruise speeds, the same is true of climb speeds.
Good climb rates and angles are possible at just above takeoff speed -- about 60-70 mph --
for obstacle clearance. More practical climbs are attained at higher speeds, with the best
climb rates coming at 100 to 115 mph, depending on weight and the propeller used. Cross
country climbs at 120-150 mph can be made with only a slight decrease in climb rate.
Pilots who fly RVs despair of loving to
put the feel of the airplanes into words, and often resort to vague hand-waving, grinning
and finally just saying "until you fly one, there is no way you can understand."
RV control response is excellent throughout the speed range. Ailerons retain some effectiveness right through the stall, and on a
low, slow landing approach, where one might expect to find them sluggish, they remain
light and quick. The differential action of the ailerons dampens adverse yaw so well that
no rudder coordination is needed for light to moderate aileron inputs. Elevator control is
positive and quick, varying from light at aft CG to moderate at a forward CG. Rudder
control is very positive, remaining effective right down to taxi speeds.
Stall characteristics of the RVs are
straightforward and predictable. They occur with relatively little pre-stall buffet
warning, but at an obviously high angle of attack and slow speed. The break is gentle and
control may be regained instantly with normal recovery procedures, often by simply
relaxing back pressure on the stick. The usual altitude loss is 25-50 and can be
held to zero by a quick application of power. There is little tendency to drop a wing
unless provoked with a skid or slip.
Spin resistance of all RV models is very good.
Very definite pro-spin control inputs are necessary to provoke spin entry. Usually spin
recovery can be achieved within the first revolution just by relaxing pro-spin control
pressures. From fully developed spins, recovery is achieved by application of normal
anti-spin control inputs.
Directional and pitch stability are positive for
all loading conditions. Roll stability is neutral, not uncommon in short span airplanes
with low dihedral angles. Rudder turn and side-slip qualities are quite normal, but rarely
needed except in crosswind landings, which RVs handle nicely. Unlike many taildraggers,
RVs are well mannered on the ground. Their directional control is similar to a Citabria or
SuperCub, but with lighter control pressures.
Ground handling qualities of the trigear RV-6A,
RV-7A, RV-8A, and RV-9A are, as might be expected, even easier than those of the taildragger RVs.
The free castering nose wheel permits easy steering with the rudder alone at anything
above low taxi speed. At low taxi speeds, differential braking maneuvers the airplane
easily, even through tight spots and crowded ramps.
In-flight visibility is exceptional. The
sloping nose and large canopy give the pilot an almost unobstructed view of the sky. The
nose is low enough that most pilots new to the RV will find themselves climbing when their
conditioned vision tells them they are level. Rearward visibility through the RV-4 and
RV-8/8A bubble canopies is similarly excellent; it is also remarkably good through the
gentle slope of the canopy and rear windows of the RV-6/6A, RV-7/7A, and
RV-9/9A.
Taxi visibility in the
tandem and tricycle models allow the pilot to see forward over the nose, and only in extreme conditions is
S-turning needed. Visibility in the RV-6, and RV-7 is not quite as good, but still offers straight
ahead taxi visibility under most conditions.
Aerobatic capability has always been
important in any true sportplane. While aerobatic flying provides valuable unusual
attitude familiarization, its main purpose is simply fun. It may be the ultimate
expression of the uninhibited joy of flight. By virtue of their wide
speed range and relatively low wing loading, the RVs are quite good aerobatic aircraft.
Roll rates are in excess of 140 deg/sec for the RV-4, RV-6/6A, RV-7/7A, and RV-8/8A. There is
practically no adverse yaw - beautifully smooth rolls can be done with feet flat on the
floor. The high inertia and low drag of the RVs permit nice loops at very low G-loads. It
is possible to perform a series of aerobatic maneuvers at cruise power, not exceed 3 or 4
G, and gain altitude at the same time.
Although RVs are capable aerobatic aircraft, we
do not recommend them for serious competition aerobatics. Their high speed is not suited
to the restricted competition zones. In order to stay "in the box they
would have to fly slower and lose the benefit of inertia, or keep the speed up and pull
too many Gs. Because of their low stall speed, the maneuvering speed (maximum full control
application speed) is in the 135 mph range. Thus, aerobatic safety in the RVs is highly
dependent on pilot technique.
The RV-3B, RV-4, RV-6/6A, RV-7/7A, and RV-8/8A have
been designed for the operational stress limits of the
aerobatic category (+6.0/-3.0 G) at and below their
aerobatic gross weights. The operational stress
limits for these aircraft between their aerobatic gross
weights and their maximum design gross weights are
utility category (+4.4/-1.75 G).
The RV-9/9A and RV-10 are not designed for aerobatic
flight.
The design operational stress limit for the RV-9/9A
is utility category (+4.4/-1.75 G) at less than 1600
pound gross weight and is standard category (+3.8/-1.5
G) between 1600 pounds and the aircraft’s design gross
weight.
The design operational stress limit for the RV-10 is
standard category (+3.8/-1.5 G).
No RV should ever be operated above its design gross
weight limit.
We recommend that RV pilots limit themselves to
what we like to call "sport" aerobatics; aerobatic maneuvers done solely for the
enjoyment to the pilot rather than of spectators or judges. These maneuvers can be
tailored to be gentle to both the airplane and the pilot. RVs can perform all the usual
aerobatic maneuvers (loops, rolls, Immelman turns, horizontal 8s, etc.) very easily and
gracefully at low G loads. They rarely need to dive to attain entry speeds. We have found,
for instance, that in the RV-4, loops can be entered from level flight and successfully
completed on 40% power. We could go on and on with such examples, but this should give you
some idea of the effortless agility that awaits you in an RV.
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