For four heady years of competition between up to four manufacturers, the World Endurance Championship lived the true spirit of technical innovation within the quest for fuel efficiency, more so even than contemporary Formula One. For the last three of those four years - 2015 through 2017 - Porsche - after a learning year returning to Prototype racing in 2014 - won Le Mans and the Manufacturers’ title in the World Endurance Championship each season. 

Porsche’s 900 bhp power unit for its 2014-2017 919 LM P1 car demonstrated what is possible when the quest is to maximise performance from a given amount of fuel within the context of a hybridised power unit and without the shackles current rules impose upon the Formula One power plant. This is a World title winning hybrid powertrain that is not a refinement within a template imposed by rule makers but one optimally designed as fit for purpose.

RET 124 presents in depth the story of this remarkable power unit that went on allow a ‘formula libre’ version of the Porsche 919 to set new lap time benchmarks at Spa Francorchamps and the Nurburgring Nordschleife in 2018. It is an unrivalled investigation into the state of the art in fuel flow limited racing. Don’t miss what will be one of the most exclusive and talked about issues of RET of recent times!

Other highlights in this issue include a look at the challenge of GTE racing, focuses on vibration analysis and friction reduction.  We report back from PRI 2019 and have the latest edition of our E-Race Power Expo feature.

Highlights in this issue include a conversation with Jonathan Bailey the man responsible for unmanned systems at Thales UK. We have dossiers on the Cellula Robotics Solus-LR UUV with its hydrogen fuel cell powertrain and the ARE series hybrid single-cylinder engine. Our focus articles look at the subjects of thermal imaging cameras and lidar sense and avoid. Our insight takes us into the world of UUVs and we report back from the Commercial UAV Show in London as well as the Commercial UAV Expo in Las Vegas.  We examine the RISE logistics system for BLOS autonomous deliveries and the Global Unmanned Spray System (GUSS) for orchard and vineyard spraying.  All this and more...

Highlights in this issue include a dossier on the Dynium Robot electric tractor and an insight into fast chargers. We look at the Lion8 refuse truck and a report from The Battery Show 2019. We also have focus articles covering radial flux motors, onboard chargers and lightweight materials.

Highlights in this issue include a conversation with DS Techeetah's team principal and the challenge of Aquabike. A dossier on the M-sport Ford Fiesta R5 I4 Turbo as well as an insight into Toyota Racing Development USA. The results of Race Engine of the Year 2019, reports from Testing Expo North America and PMWE 2019 as well as focus articles covering computer aided manufacturing (CAM), turbo's and superchargers.

Highlights in this issue include a dossier looking at what it takes to build and run Rickie Smith's Pro Mod Camaro for the NHRA Pro Mod competition.  Dustin Lee explains what it takes to prepare a competitive Suzuki Hayabusa bike for the extremely tightly fought index and bracket (ET) formats of the sportsman class.  We have a focus on chassis materials and fabrication and an insight into wheelie bars. Drag Race Technology v10 has digests on the Wairua Spirit LSR car from New Zealand which is aiming for the outright wheel driven land speed record and Erica Enders' Elite Motorsport Pro Stock Camaro.

Highlights in this issue include a conversation with Drone Evolution's technical director John Young as well as dossiers on the Phoenix UAS and the Adelan solid oxide fuel cell. An insight into construction and we look at the Supacat hybrid ATMP. Reports from InterGeo 2019, DSEI 2019 and our tour of Oregon. We look at the Copperstone Helix as well as focus articles covering sonar systems and power management systems.

Highlights in this issue include a conversation with HPD’s Mark Crawford as well as an update on the Yamaha MotoGP I4. A dossier on the Bolt HRC-4 I4 Turbo, the challenge of Moto3 with KTM and we look at Hybrids in the WRC. Focus articles on component lifting, valves and piston rings, we also detail the Race Engine of the Year 2019 Nominations. E-Race Power Technology contains a conversation with Mercedes-Benz’s Ian James as well as looking at the Lightning Motorcycles LS-218.

Highlights in this issue include a conversation with Michel Nanden and an insight into rally aero. A dossier on the M-Sport Fiesta R5 MKII and a tech review of WRC 2019. We look at the Proton Iriz R5 and the Paddon Rallysport Hyundai I20 AP4, as well as a focus article covering differentials.

Highlights in this issue include conversations with ASVs Geoff Douglass and SkySkopes Matt Dunleavy, dossiers on the ecoSUB Robotics AUVs and the Apple Tree Innovation WAM-167BB. We look at the AMZ Driverless gotthard and the Aerdron HL4 Herculift as well as an insight into unmanned space vehicles. A show report from InterDrone 2019 as well as focus articles on engine control units and video systems.

Highlights in this issue include a conversation with Renault F1's technical director Remi Taffin and the challenge of F1H20 World Championship. A report from the British Grand Prix 2019 and Engine Expo 2019, as well as a dossier on the Outkast Racing Engines RY45 Late Model v8. We investigate the Team Bath Formula Student KTM Turbo, the EDL Judd DB and the Suzuki NHRA Pro Stock motorcycle. As well as a focus article covering transmissions.

Highlights in this issue include a conversation with MagDev's technical director David Richards, as well as a look at the Tropos Motors ABLE-XR. A dossier on the Lightning Strike Motorcycle and a deep insight into hydrogen-powered vehicles. We look at the Solaris Urbino 18 electric in operation, as well as focus articles covering insulation and inverters.

Highlights in this issue include a conversation with Ben Wood and a focus article covering design for AM. A dossier on the Mazda RT24-P DPi and insights into Core Autosport IMSA simulation and LM P1 performance sensitivity. A tech review of Le Mans 2019 as well as our supplier directory and appendix.

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.