Comment Re:Rover tried this too in the 40s (Score 1) 338
I have heard a few stories about the Rover; one of the senior engineers on the project was an elderly, but still very clever neighbour who I talked to a few times about the car he worked on during the mid-50's.
From what he told me, to drive the car was fun; the turbine whine made it very distinctive and the car handling was improved by engine placement & reduced weight over the standard Rover V8. He used to be able to borrow one prototype car at times to drive home, despite it not being strictly road legal. Apparently quite the sensation in the small town where he lived.
He also talked about the problems; the gear-box which was heavy, expensive and complex, reducing some of the advantages of having a gas-turbine in the first place. You can see why; at the time manual gear-boxes were relatively crude anyway, and to engage first you had to couple with a turbine 'idling' and 35,000rpm.
The thirst for lubrication oil and petrol at a time when petrol in the UK went from being rationed to just being expensive was not good timing, though 12mpg was not that bad compared with big Rolls Royce engines. The car also gave a whole new perspective on turbo lag; acceleration & de-acceleration was not that great when you had to wait for the turbine to spin up to get the full 100+HP.. and then brake the turbine to slow it down again (wasting fuel).
Main problem he talked about was heat. An aircraft (or boat) can dump the waste heat out the back without any concern, and gas-turbines are more efficient at low temperatures at altitude, but in a road legal car... they apparently tried dumping the exhaust out under-car vents, (melting the tar-seal), out the back (burn hazard to anybody walking behind the car) and finally venting above the car. The later models used large complex heat-exchanges to try and cool the exhaust and scavenge waste heat, but it was still a big engineering challenge.
AFAIK one never crashed, but a minor accident would be interesting if you had a turbine spinning at 50,000rpm under the bonnet.. I imagine it would throw hot metal a long way.
All this of course was done starting in the 1940's, with the prototype in 1950.. years ahead of Chrysler who sounds like they went through the same process of discovering the draw-backs.
The gas-turbine could probably be mated with a hybrid drive-train to avoid many of the issues faced by Rover and Chrysler, but I am still sceptical; so many revolutionary engine designs including the Wankel rotary don't become mainstream as conventional piston internal combustion engines, despite the theoretical draw-backs, have evolved and been refined over such as long time that its difficult to bet them in all aspects without failing in cost, size, power, economy, noise, lag or other criteria.