Given criteria (see post), what's the best radiator arrangement for a single seat/single engine fighter?

BarnOwlLover

Airman 1st Class
209
54
Nov 3, 2022
Given that you have an aircraft that uses a liquid cooled engine, and a certain list of criteria, what would be the best radiator housing arrangement for a single seat, single engine fighter?

Criteria:

--Aircraft has to have provision to carry fuselage mounted cameras (ports out to the side/sides and, preferably, ventral).
--Conversion for being a dual control trainer with minimal changes beyond adding the second cockpit.
--Allowing for max fuel capacity (wings and/or fuselage) while maintaining CG (radiator(s) can be used to balance CG as well)
--Present a minimum of drag (at least some useful use of the Meredith effect preferred)
--Optimum (if possible) balance of aero efficiency, cooling efficiency, and ease of servicing and maintenance.
 
18
5
Jan 24, 2023
I'm inclined to say in the wing root as with the Mosquito, Hornet and some apparently promising Hawker Tempest/Fury prototypes. Of course the Mustang radiator is an obvious answer as well, but may impede the ventral camera. At least as important to placement though is the design of the radiator itself. Clever placement only does so much if it's twice as big as it needs to be.
 

Sisu

Airman
15
42
Mar 11, 2021
Given that you have an aircraft that uses a liquid cooled engine, and a certain list of criteria, what would be the best radiator housing arrangement for a single seat, single engine fighter?

Criteria:

--Aircraft has to have provision to carry fuselage mounted cameras (ports out to the side/sides and, preferably, ventral).
--Conversion for being a dual control trainer with minimal changes beyond adding the second cockpit.
--Allowing for max fuel capacity (wings and/or fuselage) while maintaining CG (radiator(s) can be used to balance CG as well)
--Present a minimum of drag (at least some useful use of the Meredith effect preferred)
--Optimum (if possible) balance of aero efficiency, cooling efficiency, and ease of servicing and maintenance.

It sounds like you are describing a Mustang -- I believe that F-6Ds and such had a vertical camera position just behind the scoop and in front of the tailwheel. The Temco TF-51Ds worked well as a trainer, other than being ugly (making a P-51 ugly is a good trick!). I guess the fuel/CG thing might not fit a Mustang, but does it matter, given that Mustang pilots did fine with the fuselage tank when they knew what they were doing?

What am I missing here?
 

BarnOwlLover

Airman 1st Class
209
54
Nov 3, 2022
If you look at how the ventral radiators are located on say a Yak-3 or a Mustang is that there's enough room behind the pilot for a second seat (with fuselage fuel tanks removed on the P-51).

Also, is there a "good way" to have Spitfire type radiators other than the Spiteful or Me-109 solutions?
 

PlasticHero

Airman 1st Class
268
401
Jul 31, 2019
Pennsylvania, USA
How much lift (if any) is lost by a wing root radiator? I mention this because jet engine intakes used to be in the wing but later went to pylon mounts. Increase in engine diameter? I like the idea of having the radiator ahead or behind the wing because of compressibility issues. (i have no specific aerodynamic knowledge)
 
18
5
Jan 24, 2023
If it's well designed it will actually improve lift, as the outlet will increase pressure beneath the wing. It's been suggested that that was actually one of the factors in the Mosquito's high altitude performance.
 

BarnOwlLover

Airman 1st Class
209
54
Nov 3, 2022
If we're going to go the ventral radiator route, what would the best arrangement be: what the P-51 used, or maybe a refined version of what the Yak-3 or later Yak-9s used?
 

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