W-Duct: FIA move to ban wastegate based Drag Reduction Devices

W-Duct-simple
It’s been discovered the FIA have issued a Technical Directive in response to a team’s request for clarification on potential exhaust aero interaction with the 2016 exhaust tailpipe rules.
In September last year, the FIA confirmed the change in the exhaust tailpipe regulations that separates the pipework for the wastegate\s from the turbo. This move was made in order to add to the sound, previously muted by having both devices blowing through the same tailpipe. To prevent any obvious aero trickery with blown effects from the extra tailpipe\s, the rules fix the pipe’s exit in the same area as the current tailpipe. However, opening up the exhaust outlets could still bring some potential exhaust interaction with the aero, along the lines of the F-Duct or Drag Reduction Duct. This new FIA TD bans any interaction between the exhausts and fluidic switches.

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DRS Mechanism Analysed

DRS_exposed

The Drag Reduction System, DRS, was introduced to F1 in 2011. It’s a system to open the rear wing flap for reduced drag to boost top speed. Over the subsequent years DRS operating mechanisms have evolved and converged on the same set up, with a wing mounted pod containing a high pressure hydraulic actuator to pull the wing open. This is an opportunity to see the mechanism in detail and explain how the set up works.

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InDetail: Force India F-Duct

F-Duct_assy

In 2010 the key technical development was the F-Duct, a legal driver controlled system that stalled the rear wing for more top speed. During the course of the season, as more of the system was uncovered by prying cameras in the pit garages, I attempted to cover the workings of the F-Duct in several posts. But just a couple of years later I was able to buy a Force India F-Duct assembly from one of the teams licensed parts sellers. With this complete F-Duct and some background from people at the team involved with the project, we are now able to explain the solution in more detail.

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