Mumbai-based ideaForge has added two variants to its Zolt vertical take-off and landing (VTOL) drone. The Zolt is an intelligence, surveillance and reconnaissance (ISR) aircraft that the Indian Army already flies. The company announced the ZOLT Hybrid and ZOLT UCAV on Oct. 6. The Hybrid adds an internal combustion engine to the battery system. According to Janes, the UCAV stays battery-powered like the baseline aircraft. ideaForge says a high-altitude version of the Hybrid will follow.
The launch moves ideaForge into longer-range ISR and into a category it calls UCAV. Two things are still unclear: which Zolt models the Army is receiving, and what the published altitude figures actually describe.
Three Zolts, Side by Side
The numbers come from two places. Janes reported figures for the baseline and Hybrid aircraft. The company release, as published by Raksha-Anirveda, gives figures for the two new variants:
- Baseline Zolt (battery): more than 3 hours of endurance, line-of-sight (LOS) range of up to 50 km and a maximum operating altitude of 3,500 m above mean sea level (AMSL), per Janes.
- ZOLT Hybrid (combustion engine plus battery): more than 6 hours of endurance and LOS range of up to 100 km. Janes gives 4,000 m AMSL. The company release gives a launch altitude of up to 2,000 m AMSL.
- ZOLT UCAV (battery): 2 to 3 hours of endurance, 30 to 50 km LOS range and a launch altitude of up to 4,500 m AMSL, per the company release.
- High-altitude Hybrid (announced, not yet launched): based on the Hybrid and rated to launch from up to 4,000 m AMSL, per the release.
The Hybrid's stated endurance and range are roughly double the baseline's: more than 6 hours against more than 3, and up to 100 km against up to 50 km. That is consistent with adding a combustion engine to a small electric VTOL airframe, though the sources do not explain the mechanism. The trade-off is altitude. The company rates the Hybrid to launch from only 2,000 m, while the battery-powered UCAV is rated to 4,500 m. That gap may explain why ideaForge has promised a separate high-altitude Hybrid, though no source says so.
The Altitude Numbers Don't Line Up
The sources disagree on altitude. Janes describes 4,000 m AMSL as the Hybrid's maximum operating altitude. The company release gives 2,000 m AMSL as the Hybrid's launch altitude, and it assigns the 4,000 m figure to the planned high-altitude variant's launch altitude. Janes also gives 4,000 m AMSL as the expected take-off altitude of that planned variant. Launch altitude is the elevation of the take-off site. Operating altitude is how high the aircraft can fly. The two are measured differently, so the sources are not necessarily contradicting each other. Still, the published material does not give one figure for both measures, and readers should not treat the Janes and company numbers as interchangeable.
A secondary report from Indian Defence News, which cites Business World, repeats the company's endurance, LOS and launch-altitude figures. It also gives 4,000 m AMSL for the planned high-altitude variant.
What "UCAV" Means Here
UCAV stands for unmanned combat aerial vehicle, and the company uses the label for its new battery-powered variant. The release says the UCAV is built for tactical missions and "precision effects," and Janes says the variants support combat missions, but the cited material does not describe a weapons fit, a munitions payload or how weapons would be released. It does describe sensors and missions. According to the release, the Zolt family can be configured with ideaForge's NAKSH ISR payloads. These cover electro-optical, infrared and mid-wave infrared (MWIR) imaging, along with laser ranging and tracking.
The release lists border and frontier surveillance, tactical reconnaissance, battlefield and fire-support intelligence (including Direction of Own Artillery Fire, or DOOAF) and target acquisition as supported uses. Indian Defence News describes border, frontier and tactical reconnaissance roles. The sensor suite points to a drone built to find and track targets, but the sources do not say whether the UCAV carries its own weapons.
Built for Jamming
Both the release and Indian Defence News stress resistance to electronic warfare (EW). ideaForge describes an EW-resilient technology stack with three parts:
- anti-jam communications
- navigation that works when GNSS satellite positioning is denied
- onboard intelligence, described in the release as onboard processing that supports decision-making at the edge and reduces dependence on continuous data links
The sources do not give technical detail on how these work, and we have seen no independent test results.
A company spokesperson told Janes on Oct. 7 that the Hybrid was developed in response to "evolving customer needs and structural industry gaps." The spokesperson said the platform incorporates lessons from recent conflicts and that the high-altitude Hybrid is coming "soon." The release also includes comments from Sachin Pukale, ideaForge's assistant general manager for product management, who said the new variants retain a common platform architecture.
The Army Order Book
Janes describes the Zolt as in service with the Indian Army. In September, ideaForge CEO Ankit Mehta told Janes the company has secured multiple Indian Army contracts for Zolt UAVs. One of them is an INR750 million (USD7.7 million) order announced in November 2025. Mehta said deliveries have commenced. Janes says it remains unclear which Zolt variants are being supplied, so it is not yet known whether the Hybrid or UCAV is part of any current Army order.
Why It Matters
The Hybrid shows how small tactical VTOL drones are being pushed beyond battery limits. A hybrid that keeps vertical take-off while roughly doubling the baseline's stated endurance and LOS range targets longer-range ISR, the segment the company says it is now entering.
The planned high-altitude variant matters because of where India might use it. Border and frontier surveillance, which the company and the secondary report both name as supported missions, can involve launching from high ground. The Hybrid's 2,000 m launch rating, as stated in the release, would limit where it can be used. The emphasis on anti-jam links and navigation without GNSS reflects the electronic-warfare conditions the company says its design addresses; the spokesperson tied the Hybrid to lessons from recent conflicts.
The Army's existing contracts mean the Zolt line already has a military customer. The open questions are which variants the Army is receiving, whether the Hybrid's altitude figures hold up in service, and what the "UCAV" label will mean in practice.
