Jet engine test compares Jet-A, diesel, biodiesel and HydroDiesel fuel power

Matt Mikka’s Warped Perception and Carbon 12 video compares Jet-A, diesel, biodiesel and HydroDiesel in an RC jet engine, with HydroDiesel described in the metadata as 80% diesel and 20% water. The setup is useful as a bench demonstration of power output, but it is not a shortcut to proving a fuel is ready for aircraft use. In aviation, the harder tests are energy density, certification, emissions profile and compatibility with existing turbine systems.

What the thrust test actually measures

The creator says he built a jet dynamometer and ran full-throttle tests to see which fuel made the most power. That kind of experiment can show how a small turbine responds to different fuel properties, combustion behavior and atomization characteristics under a controlled load. It does not, by itself, show whether a fuel can be certified, transported, stored and burned across the operating envelope that matters in commercial aviation.

That distinction matters because a thrust demo answers a narrow question: how much power did the engine produce in one test configuration? Aviation operators need a broader answer: will the fuel keep performance stable in cold soak conditions, avoid deposits, work with seals and pumps, and deliver repeatable results across fleets and climates? A short run on an RC jet can highlight combustion differences, but it cannot substitute for qualification campaigns on certified hardware.

Why Jet-A remains the baseline

Jet A is the benchmark fuel in most jet-engine research because it is the standard aviation fuel around which turbine systems, supply chains and test methods have been built. When researchers compare alternative fuels to Jet A, they are not just chasing thrust numbers, they are checking whether a substitute can match the physical and operational envelope that aircraft already use.

That is why the comparison in the video is interesting but incomplete. Diesel and biodiesel may ignite and make thrust in a small turbine, yet the aviation question is whether a fuel can behave like Jet A over time, at altitude and across changing temperatures. The benchmark is not just how hard the engine pushes in one run, but whether the fuel can fit the same distribution, storage and certification framework.

What biodiesel studies show

MDPI research has found that lower biodiesel concentrations in Jet A blends can improve specific fuel consumption and combustion efficiency, while higher concentrations may reduce thrust. That is the key lesson for readers who see a thrust test and assume a stronger plume means a better aviation fuel. In practice, more aggressive blending can change the very fuel properties that turbines depend on.

A 2019 MDPI study put that question on a much larger test stand, using a 640 kW full-scale J69-T-25A turbojet engine and blends of Jet A1 with oil palm biodiesel ranging from 0% to 10% by volume. That matters because the engine scale, test control and fuel handling are far closer to aviation-relevant conditions than a simple bench demo. The broader research also flags the engineering tradeoffs that show up quickly when biodiesel enters the picture, including higher viscosity and lower heating value versus Jet A, along with cold-weather limitations.

Those properties help explain why biodiesel can be a useful research feedstock and still fall short of a drop-in aviation answer on its own. A fuel can improve one metric and worsen another. For turbine operators, a marginal gain in one lab condition is not enough if it comes with poorer handling, lower thrust at other blends or a narrower operating window.

What SAF is supposed to solve

The U.S. Department of Energy describes sustainable aviation fuel as a drop-in synthesized hydrocarbon fuel made from waste streams, biomass material and feedstocks, or gaseous carbon oxides. That “drop-in” word is doing a lot of work. It means the fuel is being developed to work with existing aircraft and airport infrastructure, rather than asking the industry to redesign the entire turbine ecosystem around a new chemistry.

DOE also says aviation is aiming to cut greenhouse-gas emissions in half by 2050. That target is why the field has moved beyond simple thrust comparisons and into lifecycle accounting, certification pathways and feedstock sourcing. A fuel that burns in a small engine is not automatically a commercial SAF candidate unless it can meet those system-level requirements at scale.

Why a diesel-heavy blend is not the same as SAF

HydroDiesel, as described in the video metadata, is 80% diesel and 20% water. That makes it a dramatic comparison fuel for a thrust test, but it is not the same thing as a certified aviation blend. The water fraction alone tells you this experiment is designed to probe combustion behavior, not to mimic a commercial turbine fuel.

That is where readers should separate spectacle from substance. A strong thrust result may show that the engine can tolerate a particular blend under one set of conditions, but commercial aviation needs a fuel that can be certified, distributed and burned reliably in turbine systems already in service. The decisive questions are still the same: how does the fuel perform on energy density, emissions, materials compatibility and operational consistency?

Cuba’s energy shift shows the same pressure, from a different angle

The Cuba angle in this story is not about aviation fuel testing, but it does reinforce the same energy-security logic. Reports in 2026 said Cuba’s renewable electricity share rose from 3.6% in 2024 to 10% in 2025, while another 2026 report said solar’s share jumped from 5.8% to more than 20% in a single year. Those numbers point to a system under stress and trying to reduce exposure to imported fossil fuels.

The Cuban Ministry of Energy and Mines has framed solar, wind, hydroelectric and biomass as part of a national plan to cut dependence on imported fossil fuels, stabilize the grid and improve energy security under sanctions and chronic fuel scarcity. That is a different sector from aviation, but the logic is familiar: when fuel supply is constrained, energy systems start rewarding domestic alternatives that can be scaled, stored and deployed with less import risk.

The bottom line for aviation readers

The Matt Mikka test is worth watching because it makes the fuel debate visible, but it should be read as a thrust comparison, not a commercial verdict. Jet-A still anchors the benchmark because aviation cares about much more than peak power in a single run. The real gatekeepers for SAF remain certification, emissions, energy density and compatibility with existing turbine systems, and that is where the industry’s next proof points will be decided.