Highlights in this issue include a cover story on Reference Technologies' Hummingbird XRP along with focus articles on Gimbals and Performance Monitoring. Nick Colosimo of BAE Systems gives his thoughts on the future of UAVs, we report back from AUVSI Xponential, have a dossier on O'Neill Power Systems NorEaster, we have an insight into UAVs and look at the Kratos Defense ATMA.

Highlights in this issue include a conversation with Aprilia's Romano Albesiano, Electric Avenue & Challenge Of The British Hill Climb Championship. A dossier on the Noonan NHRA Pro Mod 4.9 Hemi, we also look at the 4Piston Super 99 as well as focus articles covering transient dynamometers & exhausts. 

Highlights in this issue include a conversation with Norio Aoki from Toyota Gazoo Racing and a report on 24-Hour Prototype Engines 2019. A dossier on the Mercury Racing 2.5 EFI F-1 H20 v6 and we look into ECR Engines Cadillac DPi-V.R. A report from the European Automotive Testing Expo 2019 as well as focus articles covering lubricants, component and materials testing. 

This issue contains an insight into supercapacitors and a show report from Electric & Hybrid Vehicle Europe 19. Dossiers on the John Deere 944K Hybrid Loader and the Protean PD18. We look at the E-Kotug as well as focus articles covering axial flux motors and cable.

Highlights in this issue include a conversation with FLIR's Tom Frost, dossiers on the Tecdron TC-800 FF and the Robby Moto UAVE as well as a look at the Teledyne SeaRaptor. An insight into USV's and we look at the Singular Aircraft FlyOx. Show reports from AUVSI Xponential 2019 & Ocean Business 2019 as well as focus articles covering propellers, simulation and testing.

Highlights in this issue include a dossier on the Prodrive World RX I4 Turbo, Race Engine Retro and the challenge of Formula E. Insights into valve seats and Jesel's Equal Eight as well as focus articles covering CAD, sensors and data acquisition. 

Highlights in this issue include a conversation with UAS CTO Andrea Maccapani and an insight into UGV's. Dossiers on the IXblue DriX and the sky Power hybrid system, as well as a look at the Planck Aero Sherwater. In Operation looks at the Delft Dynamics RH4 and show reports from IDEX 2019 and Oceanology Americas 2019. A digest on the StreetDrone Twizy as well as focus articles covering maintenance and ground control systems.

Highlights in this issue include a conversation with Brian Campe and a dossier on 2019 Ford Mustang Development. Insights into NASCAR aero as well as simulation and modelling of a dirt late model. We look at the Ginetta G40R Hot Rod and the Acme Racing Super Modified as well as a focus on off-track testing.

Highlights in this issue include a conversation with Tankpool 24 Racing's Stefan Honens, a dossier on the Jon Kaase Extreme Pro Stock V8 and challenge of Dakar Malle Moto. A report from Autosport Engineering 2019, special investigations into Time Attack and the Elmer Racing Thor I4 Turbo. An insight into Electromagnetic design tools as well as focus articles covering fuel filters.

This issue contains insights into AI and the Uniti One EV, a dossier on the Phi-Power PHI301, we look at the EVIE street-sweeper, digest the Xing Mobility Miss R and focus articles on battery management systems and testing and simulation systems. We report back from Electric & Hybrid Vehicle Technology Expo and ponder hydrogen fuel cells.

Highlights in this issue include a conversation with Energica's CTO Giampiero Testoni, an insight into high-performance computing as well as electric avenue. A dossier on Yamaha's YZR-M1 I4, the challenge of Top Fuel Hydroplane and a show report from PRI 2018. We take a look at the Gyrtech Dakar Caterpillar I6 Turbodiesel as well as a focus on crankshafts.

Highlights in this issue include a conversation with Iain Watt of Action Express Racing, a dossier on the Ginetta G60 LT P1 and a technical review of 2018. Insight into IMSA DPi vs Indycar and we look and the Aston Martin Vantage GTE. A profile on the BMW M8 GTE, a retrospective look at the Peugeot 908 transmission as well a focus articles covering composites.