A question about the Lockheed Constellation

This is the place where we can all meet and speak about whatever is on the mind.
TreeTops
Technical Sergeant
Posts: 869
Joined: 07 Apr 2010

Re: A question about the Lockheed Constellation

Post TreeTops »

My personal favourite is the B377, but it is only for FSX. The Connie is much newer in the A2A lineup.
They are both wonderful aircraft.
Cheers
Trev

Mickel
Staff Sergeant
Posts: 323
Joined: 11 Oct 2014
Location: Adelaide

Re: A question about the Lockheed Constellation

Post Mickel »

The Strat. The Connie is lovely. But the Strat just has something special about it.
Cub, Cherokee, Comanche, Civvie 'stang, P-40, B-377 COTS, Spitfire, Connie, T-6, C-172, C-182, D-III, Anson, F4U

CookerCook
Senior Airman
Posts: 164
Joined: 27 May 2020

Re: A question about the Lockheed Constellation

Post CookerCook »

What do you guys think of a Piston-fan engine?
It’s like a Turbofan, but is powered by a piston or a radial engine.
“You Drive a Mustang?”
“No, I fly one.”

flapman
Staff Sergeant
Posts: 381
Joined: 10 Oct 2013

Re: A question about the Lockheed Constellation

Post flapman »

CookerCook wrote:
15 Oct 2020, 18:49
What do you guys think of a Piston-fan engine?
It’s like a Turbofan, but is powered by a piston or a radial engine.
It sounds to me like a solution looking for a problem.

CookerCook
Senior Airman
Posts: 164
Joined: 27 May 2020

Re: A question about the Lockheed Constellation

Post CookerCook »

flapman wrote:
15 Oct 2020, 22:15
CookerCook wrote:
15 Oct 2020, 18:49
What do you guys think of a Piston-fan engine?
It’s like a Turbofan, but is powered by a piston or a radial engine.
It sounds to me like a solution looking for a problem.
Kindly explain. Not to tick you off or anything. Honestly, I am a bit curious.
“You Drive a Mustang?”
“No, I fly one.”

Tomas Linnet
Senior Master Sergeant
Posts: 1895
Joined: 05 Nov 2013
Location: Oksboel, Denmark

Re: A question about the Lockheed Constellation

Post Tomas Linnet »

Fan...like in a ducted fan or???
Kind Regards
Tomas

Accu-Sim aircraft in my hangar:
C172, C182, P51 Civ, P51 Mil, B17, Spitfire, P47, B377 COTS,
J3 Cub, T6, Connie, P-40, V35B
A2A Accu-Sim Avro Lancaster Loading:............0.000001% complete, please wait.

User avatar
AKar
A2A Mechanic
Posts: 4532
Joined: 26 May 2013

Re: A question about the Lockheed Constellation

Post AKar »

CookerCook wrote:
15 Oct 2020, 18:49
What do you guys think of a Piston-fan engine?
It’s like a Turbofan, but is powered by a piston or a radial engine.
Oh dear lord no... :wink: :D

-Esa

flapman
Staff Sergeant
Posts: 381
Joined: 10 Oct 2013

Re: A question about the Lockheed Constellation

Post flapman »

CookerCook wrote:
16 Oct 2020, 01:03
Kindly explain. Not to tick you off or anything. Honestly, I am a bit curious.
Well I had to crack open the aerodynamics book, but I'll try my best.
The first check of the idea is what I could call the "sanity check." As in, if this really is a useful idea, why has nobody tried it (they spend millions of dollars on this type of stuff)? And why hasn't the industry adopted it? With the development of piston aero engines this was never a priority... I suspect because there was always somewhere else that could be better improved.

The next question, is why do turbojet engines need fans in the first place? The answer is bypass ratio. A jet engine gets terrible fuel economy unless some of the air is allowed to bypass the combustion chamber. That's why the fan exists. So, it's a solution to the problem of jet engine fuel efficiency. When you delete the jet engine, you delete the entire concept of bypass ratio, and thus the entire need for a fan. What's the bypass ratio of air moved by a propeller, vs the amount of air that leaves the exhaust stack of the piston engine driving it?

That leaves you with a big useless duct which the airplane has to drag through the air. I did find this though:

Image

From Wikipedia: https://en.wikipedia.org/wiki/Cessna_XMC
Phase III - Model 1034 - June 1972
Use of shrouded propeller to test improvements in propeller efficiency and reduction of noise

Test results

The XMC project ended in 1972. The aircraft configuration proved to have higher cabin noise levels than the production Cessna 150 and offered no performance advantages over the older design.[2]

User avatar
AKar
A2A Mechanic
Posts: 4532
Joined: 26 May 2013

Re: A question about the Lockheed Constellation

Post AKar »

The simplest explanation boils down to simple issues: fans need huge amounts of power when pushing large mass flows of highly accelerated air. We've seen piston engines of up to several thousand horsepower but they tend to be unreliable and cumbersome in airplane applications. And when speaking of usual fan applications, we are not talking about thousands of horsepower, but about tens of thousands. The gas turbine is the only proven reliable mean to provide such power in a package of reasonable weight and size. For a surprise if looking into the future from the '40ies, they do that in highly reliable manner as well.

-Esa

CookerCook
Senior Airman
Posts: 164
Joined: 27 May 2020

Re: A question about the Lockheed Constellation

Post CookerCook »

I never would’ve appreciated War Planes, General Aviation and old analogue gauge aircraft if it wasn’t for A2A.
“You Drive a Mustang?”
“No, I fly one.”

User avatar
Lewis - A2A
A2A Lieutenant Colonel
Posts: 31431
Joined: 06 Nov 2004
Location: Beccles, Suffolk, UK
Contact:

Re: A question about the Lockheed Constellation

Post Lewis - A2A »

CookerCook wrote:
17 Oct 2020, 11:44
I never would’ve appreciated War Planes, General Aviation and old analogue gauge aircraft if it wasn’t for A2A.
Tbh I am a little similar hehe
A2A Facebook for news live to your social media newsfeed
A2A Youtube because a video can say a thousand screenshots,..
A2A Simulations Twitter for news live to your social media newsfeed
A2A Simulations Community Discord for voice/text chat

CookerCook
Senior Airman
Posts: 164
Joined: 27 May 2020

Re: A question about the Lockheed Constellation

Post CookerCook »

Lewis - A2A wrote:
19 Oct 2020, 05:19
CookerCook wrote:
17 Oct 2020, 11:44
I never would’ve appreciated War Planes, General Aviation and old analogue gauge aircraft if it wasn’t for A2A.
Tbh I am a little similar hehe
All I’m saying is, A2A really puts the real in realism. I cannot wait for the first A2A addon to come out of Microsoft Flight Simulator 2020.
“You Drive a Mustang?”
“No, I fly one.”

new reply

Return to “Pilot's Lounge”

Who is online

Users browsing this forum: Tomas Linnet and 13 guests