FLYING THE WESTLAND LYSANDER
I know of no other pilot’s seat in all of aviation like the one in a Lysander. It’s a throne. It’s way up high, and climbing up there is like ascending the ratlines of a square-rigged ship. Your feet slip into toeholds here and there, you swing from various struts, and eventually, when you reach the summit, you stand on the cockpit sill and can view the airport from a truly lofty perch.
Once in the seat, you can further attain the utmost elevation by winding on an adjustment wheel by your right leg. This cranks the seat up so high that you can hardly see the tops of the round dials on the panel. You can actually see over the nose of the 860 hp Bristol Mercury XX radial engine, and it overlooks everything on the field.
Of course, the purpose of all this elevation was to allow an almost perfect view of the battlefield. In 1937, it was assumed that the Lysander would be up there on the front lines, spotting for the artillery and discovering where the enemy was hiding. That was before May 1940 in France, when a horrific loss rate made it clear that complete air superiority was essential to the Lysander’s survival. Later, the aeroplane [it is so utterly British that it must be spelled “aeroplane”, not “airplane”], had other roles to play, like dropping secret agents, weapons and radio equipment into small pastures in Occupied France in the dead of the night.
Mike Potter bought Lysander CF-VZZ from a Saskatchewan farm. It had been built originally at Malton, Ontario—where the Avro Arrow would eventually fly, then be scrapped—and was flown by the RCAF as a target tug and liaison aircraft. Used briefly post-war as a crop-duster, it had languished for decades, until being largely restored by Saskatchewan collection and warbird restorer Harry Whereatt, the man who also began the restoration on our Hawker Hurricane XII. Vintage Wings of Canada assembled a team of volunteers and through three years of steady work, had it ready for a first flight in 2010.
Mike usually flies the fighters, but received a checkout in the Lysander in July 2014, and enjoyed it so much that he sent me an email: “Dave, as Manager of Restorations, you should fly this machine—it’ll help you understand the complexities of aircraft of this era.” I replied immediately, that yes, his logic was impeccable!
Related Stories
Click on image
The Lysander is an oddball, although I mean that in the most affectionate way. For example, the pilot has absolutely no control over when the slats and flaps deploy or retract. No lever, no valve, no switch. There are corners of the envelope where there is not enough elevator authority to stop a pitch-up, or make it flare for landing. Thus, it is not an aeroplane to fire up lightly. A thorough ground school and flight briefing is essential.
My coach for this was John Aitken: Senior Pilot at Vintage Wings, winner of the McKee Trophy*, retired Chief Pilot at the National Research Council of Canada’s Flight Research Laboratory, Spitfire and Mustang pilot, Aviator-Emeritus. I met him in the classroom one Friday and spent the afternoon reviewing his Lysander Course—which by the way will probably be taught in the winter of 2014–15 as part of our very popular “Warbird U” series. This was a very polished and professional PowerPoint-based presentation that covered all aspects of the airframe and systems. Later we moved to handling and the checklist, then normal operations and emergencies.
I had read the Second World War pilot’s notes, which led me to conclude: “Man, is this thing British!” But the ground school was far more complete. The high-lift devices are an example. There are leading edge slats in two sections, inner and outer. They are of the Handley Page principle: as the aircraft slows and its angle of attack increases, lift exerted by the airfoil action of the slat is harnessed by very clever gears to deploy them forward automatically. Out they go on their own! This is similar to the A-model Tiger Moth and others as wide-ranging as the Messerschmitt Bf-109 and the Canadair F-86 Sabre VI. What is unique is that these inner slats are chain-linked to the flaps, and as the slats go out, so to do the flaps. No handle or button or lever in the cockpit whatsoever. No lock. No control of any kind.
Do we take off like a normal taildragger? (Power-up, pause, then stick-forward and raise the tail?) Nooooo... because this would reduce the angle of attack and retract some of the flaps and slats and increase your stall speed and take-off run. In the Lysander, we take off three-point! (Or very close to it.) As I say, it is unwise to just hop in a Lysander and go, assuming that unlikely event was possible.
Earlier that morning we had pre-oiled the nine-cylinder Mercury, which is necessary to avoid metal-upon-metal during start-up. The manual calls for this if the engine has been sitting for five days (bring plenty of rags, it’s a messy business). First, oil is heated in a five-gallon tank equipped with a hand-pump. Then the oil screen is removed from the lower forward section of the crankcase (accessible from the bottom of the cowl), and the oil line is connected to one of three ports located in an access door on the left side. These ports lead to the crankshaft, the supercharger, and the reduction gears. In each case, you pump until oil flows out the oil screen housing. Of course then it also flows all over the bottom of the cowl, down into the carb air intake, and onto the floor—very liberally! (We deployed a large wheeled oil-change pan.) Several gallons were used. Everyone’s hands and at least one shirt front were well lubricated.
There is a separate lubrication schedule for the rockers in the cylinder heads. There is no pressure oil feed and they have to be greased and oiled, like a Kinner engine.
Bristol Mercury engines have a reputation for being hard to start. Ours wasn’t, although there is a “bit of a procedure.” After the pre-oil, we of course pull the engine through. This confirms we don’t have a lower cylinder full of oil. (Engines like these are made of unobtanium—we don’t want to bend a connecting-rod.) Then, walk around complete, we climb Mt. Lysander and get seated. On the panel is a big Ki-Gass** primer (it’s like a Cessna primer but with 4 times the volume). You can direct the prime to two places: the carburetor bowl or the cylinders. First you fill up the bowl. At first it feels like you’re pumping air, but using a very rapid stroke a little resistance can be felt at the end of each one. John was on the ramp watching and confirmed that fuel was dripping onto the ground – bowl full. It took about 60 fast strokes. Then we turn the lever and direct six good hard pumps to the cylinders.
The boost-coil and start buttons are pressed simultaneously, the prop turns, and after three blades, the mags go to “ON”. With luck, it starts immediately—ours did.
The Mercury is known for a few bad habits such as carb ice, “rich cut” and backfires after start and while taxiing. Paul Tremblay, our Director of Maintenance, had adjusted the idle mixture to max rich. This, plus very slow forward movement of the throttle resulted in smooth engine running on the ground, and no backfires. Leaving the Carb Heat to “Hot” helps with this by richening the mixture. And it has the lowest idle RPM of any aircraft engine I’ve ever seen. It will run at 300 engine rpm, and it’s a geared engine, so the prop is about 40% slower. You can almost count the blades going by, like a windmill in a gentle breeze. Starting is accomplished with the prop pitch set to “Coarse”, like a Harvard. Once oil pressure is confirmed, “Fine” is selected.
Taxiing is the main gotcha with this aeroplane. It has a long wheelbase, the mains are fairly close together, and the tail is quite heavy. This means when you jab a brake, not much happens. There just isn’t much turning-moment. Of course, the brake controls are British, a lever on the spade grip of the control column, plus differential on the pedals—and it has pneumatic bladder shoe brakes. (Did I mention it was British?)
Our first sortie was in the face of rapidly advancing rain clouds, so we made it a ground mission. This is actually a very good intro to any radically new airplane—don’t go flying at all. Start it up, taxi it around, shut it down, then go home and sleep on it.
In 2010, the pneumatics gave us trouble. The engine-driven pump couldn’t keep up. Then we plumbed an electrically driven air pump into the line. Fixed! But the thing still doesn’t like to turn. It’s the geometry, not the British brakes, and from what I’ve read, pilots complained about it in the Second World War.
The tail is quite heavy. I tried the Tiger Moth trick of full rudder, forward stick, a large blast of power—ground-looping around—no result. CF-VZZ has ballast in the tail for flight controllability, but it makes the tail that much heavier on the ground, and even less likely to turn. There is no tailwheel steering of course. It’s free-castering, or such is the theory. Reality: it likes to go straight, or on its own merry way.
So, the best you can do is get up a head of steam, then apply full rudder and a large squeeze of brake, plus keep in mind where the wind is coming from. It reminded me of flying off floats or skis: sometimes it’s impossible to force the rudder up into a side wind from a standing start, and it’s better to turn the other way, 270 degrees, getting up some momentum, to achieve a 90 degree turn.
John said there are times when you can land this aeroplane, but cannot taxi it to the hangar. I concur. Rick Rickards, who flies the Canadian Warplane Heritage Museum’s Lysander in Hamilton, says he uses hangars, offices, large trucks, every bit of wind-shelter he can find sometimes to get to the runway and back.
Day Two: there was a crosswind rising, but John said it was do-able, and since he was sitting in the back seat, with no controls, and me on my first flight, I was forced to believe him. (A brave man, John Aitken.)
Start-up was as before—exactly. Smooth and clean. Run-up was straightforward, although the brakes were not strong enough for the highest-power segment of the check. We trundled out to the runway, being careful to remember not to instinctively rely on toe-brakes, which don’t exist. (Lysanders trundle—that’s what they do.)
John said he found the rudder bar distracting. It’s a simple bar, World War One-style, pivoting in the middle, with footrests for each boot. He was accustomed to rudders which move fore-and-aft, and in which your heel slides on a plate, with only your toes on the pedal. This is quite different. It’s similar to the Hawker Hurricane’s arrangement. I have a few hours on our Hurri IV, thus it didn’t feel too unfamiliar.
Grandly backtracking, surveying the world from on high, “Lord-Of-The-Manor”, we arrived at the runway end and made ready for flight. John recommended closing the side windows: “It’s noisy as hell!” The canopy arrangement works well—a sliding hood comes forward overhead and locks into the top of the windscreen, and then a slider comes up on each side and notches into place. Plus there are smaller sliders in each side window.
But here, before takeoff, we need to talk about elevator trim: there isn’t enough elevator authority to control the aeroplane is all phases of flight, and it’s not just a matter of overpowering a mis-set trim with sheer muscle. The horizontal stabilizer is on a screw-jack, and as you wind the trim wheel, its entire angle of incidence changes. You need this extra pitch authority to control the aeroplane. For example, if you are trimmed for an approach, and then must go-around and apply full power, full forward stick will not be enough to stop the aeroplane from going for the moon. You need trim as well. And here’s the thing: the trim wheel is stiff, and it takes about 20 seconds to wind it from one end to the other. Similarly, on takeoff, if you have it trimmed at the takeoff setting, and encounter a complete engine failure at 200 ft., you can get the aircraft pitched down, but you will probably not have enough authority to round-out for a landing.
So on take-off, we mis-trim, and set it halfway between the Takeoff mark and full UP. This allows us to control the airplane during takeoff, and still have a good chance of doing so if the engine quits at the wrong time. (Other Lysanders may have different trim regimes depending on their ballast and passenger loading.)
Later, on approach, we remind ourselves that in the event of a go-around, we will do it in stages: power, trim, power, trim, power, trim... Speaking of power, the aeroplane has bags of it. Over 850 hp in a geared, supercharged engine turning a three-bladed prop, and we aren’t carrying any wartime loads. VZZ weighs less than a DHC-2 Beaver, with nearly twice the horsepower. The book calls for 4 1/4” of boost on takeoff. I think I got to 1 ½” and suddenly it was airborne.
And it gets airborne in nearly a three-point attitude. This is one aeroplane in which you don’t push the tail up during the takeoff roll, as stated earlier. We didn’t quite take off three-point—the slipstream is powerful and the elevator is so low that there is a ground-effect there, and it lifts the tailwheel off. But the thing magically departs planet earth and suddenly you’re 50 ft. up. To be honest, it’s not much different from a lightly-loaded Moth on a gusty day. They’ve been known to do the same thing if you don’t raise the tail. But by the time it happens on the powerful Lysander you have accelerated well above the deep-stall speed, and you’re away!
A mild swerve tells you it’s a left-foot airplane! The prop turns British, again like a Moth. In reality this makes no difference. You simply do what you have to do to eliminate yaw. But if you were accustomed to flying only North American products, it might generate a surprise.
Your hand goes instinctively to the trim wheel, winding forward madly, and you accelerate to above 110 mph for the slats and flaps to retract and so the engine will stay cool, gills fully open. (If the engine quits, you will have to ram down the nose and wind the trim madly back again to be able to flare.) Here we run into a propeller issue: this is a two-speed Rotol unit, not a constant speed. We took off in Full Fine. If we leave takeoff power on, and pitch in Fine, we can over speed the Mercury beyond its 2,650 RPM limit. So, we try to keep the RPM back to its max climb limit of 2,400 by selecting the prop to its other position—Coarse. (There is nothing in-between.) Often this occurs before we’re past the end of the runway.
After that, you’re flying! In the air it behaves like any airplane. It’s heavy in pitch, but you trim that out. The ailerons are heavy but responsive, like a Douglas DC-9. The rudder is very light. (I don’t know why this is—the aircraft does not employ an obvious aerodynamic balance on the rudder. Perhaps the placement of the rudder hinge, well aft of the leading edge, provides a scoop-effect. But it is very slight when viewed on the ground.) The top needle on the Reid-and-Sigrist Turn-And-Slip indicator wasn’t working, and thus I think I may have rattled poor John around in the back like a pea in a pod.
We didn’t have a lot of ceiling that day, thus were a bit limited in exploring the aircraft’s margins of flight. Gentle banks back and forth morphed into lazy eights and wingovers. I noticed that anytime the nose pointed well down, the stick ended up near its aft limit to arrest it. Anything more aggressive would have required trim during the manoeuvre. The Lysander is not an aerobatic king. Still, it was very enjoyable—the view is tremendous! You are out in front of the wing—you can sight down its leading edge—and can see almost vertically down if you move your head to one side. Speaking of which, when I explored sideslipping, I had the side small window open, and an enormous blast came through. I wasn’t wearing my helmet that day because of an avionics problem, just a headset and a ball cap. When the sideslip happened, air pounded through the side window, struck my face from a low angle, caught the bill of my hat, and lifted that plus my headset off the top of my head. Very startling! And very, very noisy all of a sudden!
We don’t stall the Lysander. It’s prohibited according to the Pilot’s Notes. What would happen is that full nose-up trim would be required to gain the elevator authority for a deep stall, combined with hi-power prop blast to aid elevator effectiveness. Then, if the engine quit, you would have to wind the trim fully nose down and wait for a considerable period before enough elevator authority would return to un-stall and recover. A great deal of altitude would be lost. Same with spins—we don’t do them. The Lysander is not a trainer.
People have always tended to lump the Lysander and the Fiesler Storch in the same category. This is nonsense. The Lysander is designed to go FAST as well as slow. Once the wings are cleaned up and gills closed, those 850 horses can be gainfully employed, and the aircraft can easily do 180 mph or more. Try that in a Storch! Vne† in a dive is 300 mph! The Mercury can be made to burn about 30 gal/hr with the mixture in “weak” and power at 2,200 rpm. This gives 140mph IAS (Indicated Air Speed). The single tank (just behind the pilot) contains about 95 Imp. gal.
It’s hot in the front seat. The oil tank is behind the instruments, on your side of the firewall. There are 2 oil coolers ahead and below your feet (for those ultra-slow, high-power approaches). On a hot day you slowly cook. On a cold day you will still be flying with the windows open, and your passenger will freeze.
Carb icing is a problem with the Mercury. VZZ is equipped with a carb temp gauge, and you always want it to indicate a good healthy margin above freezing. A simple knob on the panel moves a diverter-valve in the air intake, and warm air is taken from the engine compartment. This seems to be quite adequate. We were flying on a humid day and I was busy, so I simply left the carb heat nearly full Hot all the time, with no ill effect.
The “Rich-Cut” is also a Mercury specialty. This is an engine stoppage caused by too-rapid movement to a high power setting. The engine has a very powerful accelerator pump. It floods the intake mixture if the throttle is moved forward aggressively. But I own a Fairchild 24W with a Warner radial engine—and pay for the overhauls myself!—thus tend to move any vintage engine throttle very, very slowly. No rich-cuts were experienced. (The rich cuts don’t seem to be encountered on the ground at low power settings—more likely the opposite, which must be something to do with the idle-jet threshold in the carburetor and the linking of the butterfly valve.) During a go-around, we will move the throttle up gently and smoothly.
Anyway, back to the airfield… no need for an “overhead break” with this airplane—it slows down fast enough! The GUMPFF†† check is very simple: only one fuel tank, no boost pump, the gear is down-and-welded, mixture goes to Normal, pitch to Fine when on final, and open the “Gills” (cowl flaps) for more drag and to set up for any go-around.
Speed target in the pattern is 100 mph. On base and final we let it bleed back to 80 mph. But there are “gotchas” here too. Any large movement in pitch will change the angle of attack (AoA), which will cause the flaps/slats to extend or retract, which will greatly affect your glide angle. If you raise the nose the AoA increases, more flaps deploy, and you drop like a rock with your nose pointing high. Diving towards the button decreases your AoA, causing flaps to retract, resulting in less drag and airspeed increase and you land long. A bit counter-intuitive!
And to make matters worse, the tail is very sensitive to prop-blast, and any power changes will immediately change the elevator’s effectiveness, even without moving the stick, causing pitch changes the pilot may not expect and further destabilizing the approach.
So, the thing to do is get the speed back, establish a glide angle that works, and then try not to change it or the power until touchdown. During the air work, I discovered that it sideslipped very nicely, just like a biplane, and thus decided to employ that. I ended up in a biplane-style continuous gentle slipping turn to touchdown, adjusting the degree of slip as required to maintain the glide path I wanted. I found this to be a very workable technique for the Lysander. No AoA changes, and I touched down where I wanted to each time.
John generally accomplishes a tail-low wheeler on the pavement. I had briefed I’d use the grass, three-point, and I did. I found the Lysander loves a grass surface! Holding it off until the stick was nearly full aft allowed it to settle on with a very mild bump, on all three. I had been a bit concerned about being so high off the ground and possibly flaring at the wrong height, but in practice it seemed quite natural. As the elevator nears the ground it practically touches the grass-tops, so its ground-effect might have something to do with the stick-feel during the flare. Once on the ground, it tracked straight even in the five mph crosswind.
The only unnatural thing was the absurdly low engine RPM. With throttle back against the stop as the speed decreased during roll-out, the prop slowed until I was sure the engine was going to quit. Thus I added power and unnecessarily increased the distance used.
Once taxiing, I looked at the elevator trim scale. Nearly full nose-up! A go-around would have been interesting. As mentioned, it would have required a gentle application of power to avoid a rich-cut, then trim, more power, trim, more power, etc. Fortunately, the airplane is light and it doesn’t take much power to start a climb.
Again the taxi in was interesting, requiring occasionally getting up a head of steam then a solid application of brakes with full rudder to start, or stop, a turn. The Lysander is not an aeroplane to taxi amongst air show obstacles, or near a busy crowd. Better to shut down and get towed in. Once parked, it’s a standard shut-down, being careful to allow the low-speed cut-off knob to snap back into place once the prop stops, to make sure it retracts properly—or the engine may not start next time.
Flying a Lysander is truly a remarkable experience. One gets the feeling that with 20 hours or so in the airplane you could do amazing things with it. Too bad they were never put on floats! Bush-flying with a Lysander would be eye-opening!
But finding tiny fields in blacked-out France, slowing to the back side of the power curve, avoiding the trees and fences and delivering secret agents and weapons... that’s another thing altogether. My hat goes off to the young men who did that. Now that I’ve flown the aeroplane on a good day, at a large airport, in the daylight, my respect for them and what they accomplished is enormous.
* The Trans-Canada Trophy, generally known as the McKee Trophy, is the oldest aviation award in Canada having been established in 1927 by Captain J. Dalzell McKee. In 1926 McKee, of Pittsburgh, Penn. accompanied by Squadron Leader Earl Godfrey of the RCAF, flew from Montréal to Vancouver in a Douglas MO-2B seaplane. McKee was so impressed by the services provided by the RCAF and the Ontario Provincial Air Service that he established an endowment by means of which the greatly coveted McKee Trophy is awarded to the Canadian whose achievements were most outstanding in promoting aviation in Canada.
** Ki-Gass is the trade name of the manufacturer of the excess fuel starting device.
† Vne – Velocity Not to Exceed
†† GUMPFF – Mnemonic for Gas, Undercarriage, Mixture, Pitch, Flaps (cowl), Flaps (wing)