You’ve heard it before: Quicksilver is back! Again and again we’ve heard this, yet it seemed to be an apparition, a mirage in the desert. As soon as you thought the company had put its financial affairs in order, along came another disappointing tale of what was politely called “corporate restructuring.” In fact, the changes were often more provocative than substantial, but they gave the impression of a company that had lost its way. The worst thing that happened was that customers became unsure if they should send deposit money. This was not a good place to be in the ultralight industry. Companies work hard to establish good reputations. They know those good vibes can disappear as quickly as a wing nut in tall grass. The 1999 reincarnation of the company is called Quicksilver Manufacturing. Previously, the company had been called Quicksilver Enterprises and Quicksilver Aircraft (and before that a series of Eipper iterations, named after founder Dick Eipper).
Quicksilver’s Sport II
Seating | 2-seat, side by side |
Empty weight | 330 pounds |
Gross weight | 720 pounds |
Wingspan | 32 feet 9 inches |
Wing area | 180 square feet |
Wing loading | 4 lbs per square foot |
Length | 17 feet 6 inches |
Height | 9 feet 4 inches |
Fuel Capacity | 6 gallons |
Kit type | Assembly |
Build time | 60-80 hours |
Standard engine | Rotax 503 dual carb |
Power | 50 hp at 6,500 rpm |
Power loading | 14.4 lbs per horsepower |
Cruise speed | 54 mph |
Never exceed speed | 75 mph |
Rate of climb at gross | 595 fpm |
Takeoff distance at gross | 102 feet |
Landing distance at gross | 240 feet |
Standard Features | Dual controls (shared center joystick; dual throttles, each outside side of seat), double-surface wing, steerable nosewheel, main wheel brakes, in-flight adjustable trim, Rotax B gearbox, airspeed indicator, 2-blade wood prop. |
Options | Rotax 582 engine, oil injection, electric start, engine instruments, 4-point shoulder harness pilot restraints, ballistic emergency parachute, floats. |
Construction | Aluminum tubing and chromoly steel airframe, AN hardware, Dacron® fabric wing covering. |
Design
Cosmetic appearance, structural integrity, achievement of design goals, effectiveness of aerodynamics, ergonomics.
Pros - The public's common perception of an ultralight is back in manufacture. Design has long defined the open-cockpit appeal. More than 12,000 Quicksilvers flying, the most successful brand in ultralight history. MXL II Sport has passed tough certification programs like Australia's. Good all-around flying characteristics and safety profile.
Cons - Fairly slow flying among today's ultralights (though this is precisely its appeal to many buyers). Wide-open cockpit shortens the flying season in cooler climates; windscreens have been developed but look ungainly. Standard lap belts aren't enough; get optional 4-point shoulder harness system. Design will appear dated to some buyers during resale.
Systems
Subsystems available to pilot such as: Flaps; Fuel sources; Electric start; In-air restart; Brakes; Engine controls; Navigations; Radio; (items covered may be optional).
Pros - Test plane was equipped with brakes, a trim system and fuel shutoff valves. Other than that, some of the MXL II Sport's beauty is its simplicity. Less to manage is less to make mistakes. Nosewheel steering linkage simplicity is typical of the design, just not much to go wrong.
Cons - "Dual" (shared) center joystick isn't as optimal as two joysticks, though it suffices. Trim system wasn't nearly as potent when flown solo. Engine repair access is harder with engine on top of the wing versus underneath.
Cockpit/Cabin
Instrumentation; Ergonomics of controls; Creature comforts; (items covered may be optional).
Pros - Assuming you agree that ultralights are fair weather flying machines, the Quicksilver is just about perfect with massive visibility. It has the environment to smell the roses and anything else in the air. Entry and exit don't get any easier than this. Dual throttles on each outside position are quite handy.
Cons - It's hard to call the Quicksilver seating area either a cockpit or a cabin - this may be the goal of some buyers, but it does limit the weather conditions that are comfortable. It does the usual "ultralight tilt to the tail" when unoccupied. Needs shoulder harnesses. Instrument mounting spots are limited. No throttle armrest.
Ground Handling
Taxi visibility; Steering; Turn radius; Shock absorption; Stance/Stability; Braking.
Pros - Nosewheel steering is quite effective with simple linkage; easy from either seat. (It's hard to recall this design once had no steerable nosewheel!) Brakes on the test aircraft were quite effective. Big tires and some tube flex gives decent absorption even though no true suspension is used. Very stable; high-speed turn offs are almost child's play.
Cons - Nosewheel steering is quite effective with simple linkage; easy from either seat. (It's hard to recall this design once had no steerable nosewheel!) Brakes on the test aircraft were quite effective. Big tires and some tube flex gives decent absorption even though no true suspension is used. Very stable; high-speed turn offs are almost child's play.
Takeoff/Landing
Qualities; Efficiency; Ease; Comparative values.
Pros - Add power and wait. Or add power and pull the stick full aft. Either will effortlessly get you off the ground. (Of course, some forward stick movement will be needed after lift-off.) Landings are also very easy if you keep your speed up enough. Good crosswind capability with authoritative ailerons. Approaches can be done very steeply using the high drag of the Quicksilver to good effect.
Cons - Get too slow in a Quicksilver and you can stall it onto the surface when your energy bleeds away and steals pitch authority (though typically the results aren't very damaging). Newer Quicksilver pilots replace lots of landing gear tubes, partly due to the lack of suspension. Fortunately, the parts aren't costly and they replace quickly.
Control
Quality and quantity for: Coordination; Authority; Pressures; Response; and Coupling.
Pros - Predictable is what Quicksilver handling is; you can count on it to always act the same, and that's good. Full-span ailerons work well but don't show a lot of adverse yaw. Well-coupled large-surface rudder is quite potent. When flying dual, at least, trim is quite effective and useful. Though controls aren't "fast," they allow good maneuverability.
Cons - With this wide-open cockpit design, side or forward slips aren't very effective (though with its ability to approach steeply, so what?). Like so many ultralights, the Quicksilver is a rudder-dominated flying machine. Stick pressures aren't light - though given its frequent role as a trainer, perhaps that's just as well.
Performance
Climb; Glide; Sink; Cruise/stall/max speeds; Endurance; Range; Maneuverability.
Pros - With the standard and well-liked 50-hp Rotax 503 dual carb engine, the Quicksilver climbs strongly, better than 600 fpm at full gross, I estimated. Its light weight aids the sensation of true ultralight flight for the student who later goes aloft solo. Cruise of 50 mph is certainly adequate for most operations.
Cons - A 50-mph cruise may seem a little pokey, but slow flight is precisely its charm to many buyers. Burns a lot of fuel, better than 3.5 gph and a 6-gallon fuel tank empties rather quickly. Glide is pretty lousy at around 5-or 6-to-1, though sink rate isn't too bad. You must accommodate these characteristics on the Quicksilver (also true on a number of other ultralights, as well).
Stability
Stall recovery and characteristics; Dampening; Spiral stability; Adverse yaw qualities.
Pros - Stability has long been one of the shining strengths of this design. Stalls are very mild in every explored regime, but amazingly, they feel even better when two are aboard. The MXL II Sport flies best with two aboard in my opinion. Won't tighten up in steep turns. Longitudinal stability was excellent in any test. Design has proven to be very strong in the air.
Cons - Except for better 2-seat operations than solo flying (an unusual situation among ultralights), I found nothing to complain about in the stability category.
Overall
Addresses the questions: "Will a buyer get what he/she expects to buy, and did the designer/builder achieve the chosen goal?"
Pros - Company has kits in stock (at time of writing) plus tremendous production capacity thanks to affiliation with large machine tool operation. Dealer network, once the world's largest, is reassembling. Excellent flying choice for many newcomers and lots of veteran ultralight pilots. Very strong and dependable design that fits most newcomers' impression of what an ultralight is. Many after-market vendors support this design.
Cons - Quicksilvers have been around since the early '80s; though they've changed, this is just too old for some buyers. Flies too slowly for longer distance cross-country enthusiasts (unless time is no worry). Feature buffs may not care for its simplicity. Glide and sink performance are low in the ultralight spectrum. Open cockpit won't be optimal for year-round flying in some climates. The Quicksilver (company) name has been sullied and may take some time to regain its luster.