Somewhere in every first conversation the question arrives: surely a jet is simply better? Faster, higher, more impressive on the apron — why would anyone choose propellers? We have brokered both for years, and the honest answer is that neither is better. They are different tools, optimised for different jobs, and the physics behind that difference is worth two minutes of your time before we get to the practical questions — because once you see it, the rest of the decision almost makes itself.
The physics nobody argues with
A jet engine makes thrust by throwing a small mass of air backwards very fast. A propeller makes thrust by moving a large mass of air backwards relatively slowly. At low speeds the propeller’s approach wastes far less energy — a modern turboprop propeller converts well over 85 per cent of its shaft power into useful thrust at cruise speeds below roughly 400 kt, an efficiency the jet only approaches once it is flying fast and high, where its engines were designed to live. Below about 25,000 ft and under about 300 kt, the propeller simply wins.
That is the whole story in one paragraph. A turboprop is not a cheap jet or an old-fashioned one — both burn kerosene through a gas turbine. It is a different answer to the question “how do we push this aircraft forward?”, and it is the more efficient answer exactly where short sectors are flown: lower, slower, with more of each flight spent climbing and descending. On regional stages, a turboprop typically burns a third to half less fuel than a jet doing the same trip. On a long, high, fast sector the advantage reverses completely. Which one you should own depends on which of those flights you actually make.
1. What runways will you actually use?
This is the decisive question, and the one brochures skip. A King Air B200 will work from strips of roughly 1,000 metres; a PC-12 — with its trailing-link gear and approval for grass, gravel and dirt — will use around 800 metres, unpaved; and a Grand Caravan EX less still. Most light jets want comfortably more than that, paved, and their certification generally assumes tar. If your mission touches lodges, mines, farms or secondary strips even occasionally, the turboprop is not the compromise; it is the only aircraft that completes the mission at all.
The Johannesburg problem: hot and high
Now add altitude. O.R. Tambo sits at 5,558 ft — one of the highest major airports in the world — and Lanseria is not far below it. On a 35-degree Highveld afternoon the air is as thin as it would be at roughly 8,500 ft on a standard day. Every aircraft feels this: engines make less power, wings make less lift, true airspeeds rise, and the runway calculation stretches. But swept-wing jets, whose wings are optimised for speed rather than lift at low speed, feel it hardest — a light jet that needs 1,100 metres at sea level can need half as much again at Johannesburg in summer, or accept a painful cut in fuel and payload. The turboprop’s big, straight wing and constant-speed propeller degrade far more gracefully. This is not a detail; it is why the ramp at Lanseria looks the way it does, and why so much of our turboprop inventory sells within the region.
If, on the other hand, you fly capital to capital on long tar runways, the turboprop’s great advantage is one you would be paying for and never using.
Representative image2. How long are your sectors?
Speed differences compound with distance — but far more slowly than the brochure numbers suggest, because both aircraft pay the same fixed costs: taxi, departure routing, climb, vectors, approach. On a 300 NM hop such as Johannesburg to Durban, a 289 kt B200 typically blocks in around twenty to twenty-five minutes behind a 453 kt Phenom 300. Nobody’s day changes over twenty minutes, and if the jet then waits in a departure queue the gap shrinks further.
Stretch the sector and the arithmetic turns. At around 900 NM — Johannesburg to Nairobi or Windhoek to Dar es Salaam territory — the jet lands an hour and a quarter or more ahead, having flown above most of the weather rather than through it. At 1,500 NM the gap is two hours and the turboprop is near its limits: the B200’s 1,580 NM and even the King Air 350’s 1,806 NM leave little margin, while a Citation XLS+ (2,100 NM at 441 kt) does the trip without thinking about it and a Challenger 350 (3,200 NM) does it nonstop from a shorter list of African runways than you might hope — range and altitude performance interact, which is a subject we cover separately.
Our rule of thumb from years of mission planning: under about 400 NM the turboprop matches the jet in practice; beyond about 700 NM the jet pulls decisively away; between them, the other questions decide.
3. What does the seat-mile need to cost?
The fuel figures are stark. A B200 burns roughly 100 US gallons an hour in cruise; a Phenom 300 burns roughly 150 to 170. The jet covers more miles in that hour, so per mile the gap narrows — but on short sectors, where so much of the flight is climb and descent, the turboprop’s per-trip burn is typically a third to half lower for the same city pair. Maintenance follows the same direction: simpler systems, lower overhaul exposure, and parts networks that reach into places jets rarely go.
The most honest evidence is what commercial operators buy when every seat has to pay. The nineteen-seat workhorses of thin African routes — the Beechcraft 1900D (1,356 NM, 280 kt) and the unpaved-strip LET L-410 — are both turboprops, as is every Caravan flying safari shuttles out of the Delta and the Mara. Charter and cargo operators fly the arithmetic, and on short, thin, rough sectors the arithmetic chooses propellers every time. A private owner flying the same profile should draw the same conclusion — and should read the full ownership numbers before deciding, because fuel is only one line of them.
Representative imageThe single-engine question
One propeller or two? The PC-12 carries nine or more passengers 1,803 NM on a single engine, and the regulators have steadily come round to it. The United States has allowed single-engine turbine aircraft to carry paying passengers under IFR since the late 1990s — the PC-12 and Caravan built large Part 135 fleets on that rule — and EASA followed in 2017 with its SET-IMC approval, which permits commercial single-engine turbine flights in cloud and at night under conditions: a demonstrated engine-reliability record, trend monitoring, weather-detection equipment and independent standby instruments and power. South African and Australian operators fly singles commercially under broadly similar logic. The PT6’s in-flight shutdown record is measured in one event per hundreds of thousands of flight hours, which is why the insurance market treats a well-flown PC-12 as a mainstream risk rather than an exotic one.
The honest caveats: some corporate flight departments and some charter clients simply will not board a single, whatever the statistics say, and long over-water legs deserve a second engine on principle. If your mission includes either, the twin-engine King Airs answer the objection while keeping the turboprop economics.
Crew, insurance and the rest of the bill
Two quieter factors push the same direction. Most turboprops in this class are certified for single-pilot operation, as are the light jets — but insurers price the pairing of pilot and type, and experienced turboprop pilots are simply easier to find and keep in Africa than typed jet crews, who are perpetually being hired away by the airlines. Premiums on a mid-time King Air with a seasoned pilot are usually undramatic; a low-time owner-pilot stepping straight into a jet will find the quote — and the mandated mentor hours — educational. Hangarage, ground handling and approach fees also scale with the aircraft’s category. None of these lines decides the question alone; together they are why the total gap between a turboprop and a light jet is wider than the fuel gap.
The honest matrix
- Short sectors, rough or short strips: turboprop, without argument — PC-12, King Air, Caravan. No jet completes this mission.
- Short sectors, good runways, image matters: a light jet like the Phenom 300 — or, honestly, still the turboprop. Twenty minutes on a 300 NM sector buys a great deal of fuel.
- Regular 800 NM+ sectors, paved runways: a jet earns its keep — the Citation Excel/XLS+ class for six to eight passengers, the Challenger 350 when the legs stretch past 2,000 NM.
- Both profiles, frequently: some owners genuinely need one of each. A King Air for the strips plus charter access to a jet for the long legs is a combination we arrange often, and it is almost always cheaper than forcing one airframe to do both jobs badly.
The full figures for every type named here are in our model guide, each with a range globe you can centre on your own base — and when the matrix points you at a type, the buying process itself is the next thing to understand. If the choice still sits between two aircraft, that conversation is free — it is the one we most enjoy having.