Red Bull's DC-6:
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A blog by a "sucker" and a "loser" who served her country in the Navy.
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7 comments:
A case could be made for the R-2800, brought to life by George Mead and Andy Wilgoos of P&W, being the acme of radial engine design. (Yes, I know, but the -3350 and the -4360 never really beat their reliability issues.)
Pretty airplane, too.
FVH
Frank, you and I both know a retired NWA captain who refers to DC-6s as "four-engined airplanes with three-bladed props" and DC-7s as "three-engined airplanes with four-bladed props".
In the Bristol museum in Bristol UK there is a skeletal cutaway full size of a multirow 9 cylinder engine. It is fascinating trying to watch all the moving pieces at once as the shaft is rotated :-)
Unfortunately, I only had a still camera with me, a video would have been great.
Anybody got one?
A few items:
•I was very fortunate to have taken a powerplants class from our school's A&P program when I was studying aviation in the '60s. In the lab was an R-2800 for use in training mechanics and other interested parties. I even had an ashtray (in my smoking days) that was the top of a piston from an R-2800. I love it.
•I was remembering the "3 bladed, 4 engined" quote as I was preparing to post this comment. I love it.
•I may have told this story, but in my working days at ZAU we used to see a freight carrier out of DET who flew DC-6es all over the Midwest. One day, as the thought occurred to me, I asked one of them in my sector, how come we saw all these -6es but we never saw any -7es?
His response was one word, and it wholly cleared up the mystery for me, "fuel". The R-2800 (on the -6es) can be made to burn 100LL. The R-3350 (on the -7es) cannot and require the largely unavailable (even when I asked the question in the early '90s) 115/145.
I loved that.
*********************
I don't know what the few flying Connies are doing about it, nor the EAL DC-7 flying out of MIA.
P.S. Your Turing test is getting ever more annoying. The all-numeric format was a vast improvement over the mostly undecipherable alpha images, but now it's changed to a gazillion digit long number for half the test. At least I can read it…
LRod, a company called Hjelmco Oil makes 115/145 on a special-order basis for just that purpose; they supply the Reno races, among others.
Deadstick,
Yeah, I knew about the special blend and RNO. I suspect it's pricey enough that high roller racers would buy it but it might be too much for a commercial operator.
LRod
ZJX, ORD, ZAU retired
Responding to LRod: For certain, you can run an R-3350 on 100LL. CAF does it all the time with Fifi (their B-29A) and I suspect the sundry Connies do the same. I would expect that you could not use full blower and the Connies have the Parts Recovery Turbines inop'ed, but they all fly light so that's not a problem. I believe that these engines have fairly low mechanical compression ratios, so fuel with a low performance number is OK as long as you don't need War Emergency Power.
I'm not sure where you'd find R-4360's in operation today, other than perhaps an FG-2 or two on the warbird circuit, and who knows what they burn.
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