Rob Sladen and Daniella Sladen, both ex-Pratt & Whitney engineers, looked at a problem that had been solved the same way for fifty years and asked a question that should have been obvious: why does an engine built to run for thirty minutes need the same lubrication system as one built to run for thirty thousand? The aerospace industry did not have a good answer. So in 2020 they founded Zulu Pods, Inc., built a sealed, self-contained oil delivery module small enough to fit in a palm, and spent five years validating it on live hardware. Last month, as the expendable loitering munition market heads toward $6.4 billion by 2035, ZPI is moving from prototype phase into production ramp: delivering 60 units this year, expecting hundreds next year, and targeting thousands annually after that.
The company's first product, the ZPod, is a hermetically sealed tank, pump, and nozzle packaged together using support-free 3D printing and placed directly in the engine bearing or gear compartment. The technical bet rests on a simple insight: conventional liquid oil systems are overbuilt for one-way platforms because the aerospace industry has never had a reason to design for short-life, high-attrition missions. Legacy lubrication systems are complex, heavy, and represent significant cost and volume in an engine designed to be cheap and disposable. ZPI's approach is to meter exactly the right amount of oil for exactly the right duration, then discard the pod with the engine. That sounds trivial until you measure the payoff: a ground test at Acutronic's Austin facility in May 2025 showed double-digit percentage reductions in thrust-specific fuel consumption (a measure of engine efficiency) compared to traditional fuel-lubricated configurations. The company then conducted flight testing with the ZPod, advancing it to Technology Readiness Level Eight, the formal DoD designation for a technology ready for operational deployment.
The funding and contract trail shows genuine traction from defense customers, not just venture interest. The Navy awarded ZPI $135,144 in July 2023 to rethink lubrication and cooling for limited-life UAV engines; the Army followed with a Phase 2 SBIR contract through its AvMC center in February 2024, and the Office of Naval Research added a Phase 2 SBIR award in September 2024. These are modest sums on their face, but they signal that two separate military branches think the problem is worth solving. Total funding stands at $2.65 million, raised from the ONR, Backswing Ventures, and eMerge Global. ZPI is not burning venture capital to chase a fantasy; it is being pulled forward by customers who want to understand whether this actually works and whether they can put it on real platforms.
Production is ramping from proof to commercial use. Last year ZPI delivered roughly a dozen pods, many at no charge so customers could test and gather performance data. This year that number reaches 60 units, with some generating actual revenue. Daniella Sladen told a conference: "We are selling hardware now. We are doing final qualification testing for some of our hardware and will be in full production next year." That production growth trajectory is not a forecast, it is a commitment backed by supply chain work and customer pull. The company is also adding product lines: the EmergencyPOD (EPOD) for loss-of-lubrication scenarios, demonstrated on a rotary-wing platform bearing test rig in September 2025, and the Anti-Corrosion SmartPod (ACSP), designed for maintenance simplification on platforms like the F-35B in partnership with Rolls-Royce and the F-35 Joint Program Office.
What matters now is platform adoption, not just contract awards. Rob Sladen explained the stage gate: "In our industry, being listed on a platform's build material means the engineering team has officially chosen your technology for the system." That is the watch point. A cruise missile or loitering munition OEM will not integrate the ZPod into production build material until ZPI has demonstrated reliability and cost predictability across multiple test cycles and operational scenarios. ZPI is operating in the right market at the right moment: loitering munitions are the fastest-growing segment in expendable drone spending, and every gram and dollar saved in the engine translates directly to payload or range. The real question is not whether the ZPod works, May 2025 proved that, but whether major OEMs move fast enough to adopt it before a larger supplier notices the gap and builds a copy. For a two-person founding team with $2.65 million in the bank, the clock is running. Watch for platform adoption announcements through late 2026 and into 2027, and for production hitting the "hundreds per year" milestone by mid-2027.