fal762
Well-known member
Acro Sport II
-
WTB / WTS / WTT ADS
All Advertisements, including Want to Buy, Want to Sell, Want to Trade, Belong in the MARKETPLACE ONLY. Any new threads posted offering an item for sale, looking to trade or buy an item which are posted outside of Marketplace will be deleted without notice or warning. Existing threads will be moved to marketplace. -
Marketplace Feedback Ratings
The Marketplace feedback ratings system is now back. You can now leave feedback for your Buy / Sell / Trade transactions. Instructions on how to leave feedback ratings can be found HERE
Take that, you radial engine perverts !!!!!
- Thread starter J. Armstrong
- Start date
I love it -
V12s disguised as radials
That 172 is hanging in the Las Vegas airport..
fal762
Well-known member
Hiller X-18
fal762
Well-known member
fal762
Well-known member
Caproni Ca.60 9 wings & 8 engines Don't recall if I posted the sdecond photo before and too lazy to go back thru all posts
Westland Whirlwind
Ed Nash did a few you tube videos on the Whirlwind….while it has a bad rep it may not be so well deserved….
Yep, a good vid - I like most all of his stuff, along with Rex's Hangar.
Always liked the looks and general idea of the Whirlwind. I think it is more handsome and and appealing than a Mosquito ( I know -heresy ! ). JMHO, though.
Four 20 mms. Apparently only about five seconds worth of ammo, though, and somewhat prone to jamming due to flexing mounts. Could have been easily resolved with relatively simple redesign. Interesting website below:
whirlwind.html
Last edited:
and its guns.
From the looks of the propeller, the engines rotated in the same directions. I know that induces some uncomfortable characteristics while flying and maneuvering. IIRC, the Brits seemed to not worry about counter revolving engines, most likely a wartime contingency. I believe all of the U.S. multi engines had them. But I could be wrong.
1911Ron
Well-known member
I know that the P38 did for sure but can't say about the others
I think Lockheed built some 38's for the Brits that had same rotation engines, Just for commonality of replacements?
1911Ron
Well-known member
I believe you are right, I remember hearing something about that along with no super chargers , the British were underwhelmed to say the least.
That's right, I forgot about the deleted turbos. I'll have to dig through some books. Somewhere I have a gigantic book of WW2 aircraft with lots of really good illustrations by a Japanese artist.
The only other counter rotating prop aircraft I can think of is the F82 Twin Mustang and that was post war/Korean Conflict.
I’ve seen a 109E-4 fly in a Niagara Falls a bunch of years back. The big Benz V12 had a distinctive, almost agricultural sound to it. Smooth, but it was quite edgy. It had a turbocharger on the starboard side of the engine, which gave it a distinctive turbo whistle when passing left to right…
Here’s a later G model in Germany. Lots of Mercedes V12 sounds here, and it sounds nothing like a Merlin or Allison. The Merlin and Allison sound silky smooth in comparison.
Here’s a later G model in Germany. Lots of Mercedes V12 sounds here, and it sounds nothing like a Merlin or Allison. The Merlin and Allison sound silky smooth in comparison.
I agree - there's something raspy about it. I don't know if it is firing order, cam timing, or what ?
I think there are close to half a dozen of them flying now, excluding the Merlin powered Spanish CASAs
Yup. I was actually quite surprised when I saw a 109 in the air for the first time alongside Spitfires, Mustangs, Hurricanes, Cobras, and Warhawks. The 109 is positively tiny in comparison. And the cockpit is, umm, snug, as well. The pilot is semi reclined on a fixed, non adjustable seat, and that birdcage canopy has plenty of blind spots. No wonder they went to the blown canopy later in the war.
The big Benz V12 used Bosch mechanical fuel injection and a turbocharger,… typical Mercedes stuff. So no carbs to tune, or carb icing problem. Mixture adjustment was automatic, so no mixture lever either, although they ran a bit rich at sea level, and they’d leave a bit of a black smoke trail at low altitudes. Maybe that’s why the Germans loved the F-4 Phantom so much?
. Prop RPM was coupled with the engine, turbo wastegate, and mixture and were all controlled through a mechanical unit which was cutting edge back then and took a ton of workload off the pilot. I believe all German aircraft used that system.If you look at a 109 with the Benz engine, that big scoop on the side of the cowl feeds air right into the turbo.
It’s nice to see those engines getting some love now. Parts being produced again, and shops that specialize in their restoration and overhaul. They don’t have the benefit of 70+ years of continued refinement like the Merlin has, but it’s more than enough to get all those old airframes back in the air.
I know for decades, the original engines were very few and far between, which is why they were all re engined with Merlins. They had no choice. Except the Czechs and Israelis, who had had Junkers bomber engines with huge paddle bladed props on the front of theirs. Turned the sleek little plane into a real mutt that was too heavy and handled like shit. But in Israel’s case, it was enough to knock down Egyptian Spitfires and C-47s, and scare off the advancing Arab Armies.
Oh irony of ironies.
Last edited:
The DBs have only been rebuildable in recent times. Rolls rebuilt one many years ago for one of the English Mes and told them don't ever trash the crankshaft because they couldn't rebuild it ( don't know why ). Apparently the specialty shops like Vintage V12s have "relearned" the DBs.Yup. I was actually quite surprised when ai saw a 109 in the air for the first time alongside Spitfires, amustangs, Hurricanes, Cobras, and Warhawks. The 109 is positively tiny in comparison. And the cockpit is, umm, snug, as well. The pilot is semi reclined on a fixed, non adjustable seat, and that birdcage canopy has plenty of blind spots. No wonder they went to the blown canopy later in the war.
The big Benz V12 used Bosch mechanical fuel injection and a turbocharger,… typical Mercedes stuff. So no carbs to tune, or carb icing problem. Mixture adjustment was automatic, so no mixture lever either, although they ran a bit rich at sea level, and they’d leave a bit of a black smoke trail at low altitudes. Maybe that’s why the Germans loved the F-4 Phantom so much?
If you look at a 109 with the Benz engine, that big scoop on the side of the cowl feeds air right into the turbo.
It’s nice to see those engines getting some love now. Parts being produced again, and shops that specialize in their restoration and overhaul. They don’t have the benefit of 70+ years of continued refinement like the Merlin has, but it’s more than enough to get all those old airframes back in the air.
I know for decades, the original engines were very few and far between, which is why they were all re engined with Merlins. They had no choice. Except the Czechs and Israelis, who had had Junkers bomber engines with huge paddle bladed props on the front of theirs. Turned the sleek little plane into a real mutt that was too heavy and handled like shit. But in Israel’s case, it was enough to knock down Egyptian Spitfires and C-47s, and scare off the advancing Arab Armies.
Oh irony of ironies.
That fuel injection pump is a real amazing piece of work. Conversely, all but the very last DBs had an inherent assymetric cooling issue and as a consequence had to run a lower compression ratio on one of the cylinder blocks. Weird !
I've always questioned the issue with the Jumo powered Mes. The Jumo is virtually. the same weight as the DB, makes me think the real issue may have been a change in cg due to mounting difference ? Seems like a pretty elementary design mistake if that is the case.