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[Barkhorn]

There is a crazy thing with these planes in Il2 - If you pay attention to their emd files, all of them use, instead of version of the G&R K14 radial engine, various versions an inline engine that was only experiemntally developped and never entered production.

Wait: u say the engine actually used in the IAR's on the game aren't the G&R K14? I don't understand...

[.50calBMG]

really, i just think it would be cool to franken a 109 nose on to the 80 and 81s. thought it would be cool to have a plane that was an interesting design. i didnt even know that a prototype of the plane existed.

[George1991]

Well, there was also one IAR 81C that received a Daimler-Benz DB 605A engine in June 1943.
According to ”Vanatorul IAR 80. Istoria unui erou necunoscut” (”IAR 80 ”le Heros meconnu””, in French), by Dan Antoniu & George Cicos, in 1943, a request was made to fit the 1475 HP DB 605A engine onto the existing fuselage of the IAR. The IAR 81C no. 326 had the engine mounted in June 1943, and flights had been made between June 29th - August 20th 1943.
The performance report stated that the performances of the aircraft had been visibly improved, including here the advantages given by the new engine.
As a result of the report, the Romanian Air and Navy Ministry decided to equip fresh factory-built IARs with the DB engine, and, eventually, to reequip all aircrafts in-service with this engine. Finally, all of this remained only at the state of intention, because the DB company refused to conclude the deal, invoking the repletion of the factory owned to the great number of contracts for engines concluded by the Luftwaffe.

[.50calBMG]

@George1991

sweet, that means this plane actually existed, which gives it rights to be in the sim with my logic. did you find any pics of it, im sure that a 605 would make the 80-81 family a bit more intimadating. you said the performance was improved, do you think you could get me a link or the comparisons of the two?

[Dreamk]

Exactly - the IAR 80-81 series in the game does not use the historical engines of these planes (Gnome and rhoen 14 and its local clones) but a fictuous powerful inline engine that never arrived to production line.

[George1991]

Hey, .50cal,

Both planes existed. According to the book referred above, a DB 601Aa engine(no. 11210) was fitted to the IAR 80 no. 13 in 1941. This plane flew just one time, on April 21st 1941, with Alexandru ”Dudu” Frim at the controls. This was an unsuccessful test, with the plane badly vibrating and the pilot struggling to get it back on the ground in one piece, which he did, ultimately. After this single test, the plane was refitted with its original IAR 14K engine.

So, there were 2 airplanes fitted with DB engines (and refitted with the original engines after testing):
                       
                    IAR 80 no. 13, with DB 601Aa, in 1941 (pic here, middle of the page: http://www.worldwar2.ro/forum/index.php?showtopic=1159&st=0)

                    IAR 81C no. 326, with DB 605, in 1943 (unfortunately, there are no pics of this one that I know of)

About the comparison tables between the DB 605 powered IAR and the original one, seems that nothing exists at the moment (or ever existed). So, I would be glad to see even one in-line engined IAR in this sim, but, at the moment, I think there is no data available to base it on. And, as an aerospace engineering student, I hardly think that fitting a new engine to a fuselage would be made without modifications to the fuselage (changing wings  shape or position, slightly moving them forwards or backwards, in order to keep the CoG and the aerodynamic pressure center where they should be, reinforcing the fuselage and the engine mount). And that is some data unknown till today. As I said, I would love to fly one of these 2 beauties in-game, but not one based on thoughts and ”if”s.

@Dreamk,

What engine type do the IARs use in-game?

Regards,

George1991

[Barkhorn]

This DB605 engined IAR should have been a heeluva good looking plane, i say. And, judging by the fact that Luftwaffe pilots who tested the IAr prototype judged it to be very agile (because of it's wing profile), and only a bit slower than the emils (because of it's engine), i suppose this DB605 IAR would have had a performance superior than the 106F.

[HundertzehnGustav]

109F?

[.50calBMG]

hey, george1991,

i have read that 601s and 05s both had large amounts of torque and huge power output for their time, so why not fit it with an Allison from the early P-40s or an early Merlin from the hurricane I, and just cut the front fuselage back until the prop is in the same or similar position.

[Dreamk]

In game the following engines are used:
IAR-80 Engine0Family IAR_Series  Engine0SubModel IAR-1000A
IAR-80A Engine0Family IAR_Series  Engine0SubModel IAR-1000A1
IAR_80B Engine0Family IAR_Series   Engine0SubModel IAR-1000A1 (same as IAR-80A)
IAR_80M Engine0Family IAR_Series  Engine0SubModel IAR-1000A1 (same as IAR-80A)
IAR-81  Engine0Family IAR_Series  Engine0SubModel IAR-1000A (same as IAR-80)

Historically the IAR 80-81 were equiped as such:
  IAR K14-II C32 - 649 kW (870 hp) engine. 1 built for IAR 80 prototype
 IAR K.14-III C36 - 690 kW (930 hp) engine. 20 built for IAR 80
 IAR K.14-IV C32 - 716 kW (960 hp) engine. 30 built for IAR 80
 IAR K.14-IV C32 1000A - 764 kW (1025 hp) engine. 430 built for IAR 80A,IAR 80B,IAR 80C, IAR 81A,IAR 81B,IAR 81C
The I.A.R.-14K was basically a licence-built version of he Gnome-Rhone Mistral Major with some minor modifications.
(BTW the IAR K14-II C32 693 kW (930 hp) engine was used for the 44 for IAR P.24E)
While the IAR 1000 A1 was a [Project] higher compression version of IAR 14K:
IAR-1000 A1 (aka IAR K14 1000A) 1140 hp sustained power
Some data for the engine IAR-1000 A1 (source Constantin C.Gheorghiu -Fabricile de avioane romanesti in perioada interbelica)
Power : 1140 Hp at (atm. pressure) 935 mmHg and 1040Hp at 850 mmHg. The data are calculated using CINA standard with zero dynamic pressure on the stick.
Carburetor type Zenith
Compressor boosting to 3600m altitude
Propeller sense of rotation: Counterclockwise (view from cockpit)
Reduction gear: 2/3
Homologation Altitude: 3200m
Boosting pressure (admission pressure?) at homologated altitude (3200m) : 850mmHg
Nominal power at 3200m with 2300 RPM : 1000Hp
Maxim power at cruising speed : 960 Hp
Nominal power at ground: 880Hp
Nominal propeller rotation: 1533 RPM
Maxim propeller rotation allowed: 2420 RPM
Cilinders numbers: 14
 Engine config.: radial



The IAR_Series.emd is defined as thus (I copied here only the relevant critical lines):
 Type Inline
  Cylinders 12
  Carburetor 2
CompressorType 2
  CompressorSteps 1
MixerType 0
  MixerAltitude 13000
[IAR-1000A]
  HorsePowers 930
RPMMin 400
  RPMNom 2300
  RPMMax 2300
  RPMMaxAllowed 2700
  Reductor 0.80
  PropDiameter 3.1
PropAnglerType 2
  PropAnglerSpeed 0.08
  PropAnglerMinParam 800.0
  PropAnglerMaxParam 2300.0
  PropPhiMin 16.0
  PropPhiMax 50.0
  PropAoA0 11.0
  CompressorPMax 1.40
  Voptimal 340.0
  CompressorAltitude0 6200.0
  CompressorMultiplier0 0.75
  CompressorRPMP0 2000.0
  CompressorRPMPMax 2400.0
  CompressorMaxATARPM 1.40
  CompressorSpeedManifold 0.6
  CompressorRPM0 400
  CompressorATA0 0.6
  CompressorRPM1 1200
  CompressorATA1 0.75
  CompressorRPM2 1400
  CompressorATA2 0.80
  CompressorRPM3 1600
  CompressorATA3 0.86
  CompressorRPM4 1800
  CompressorATA4 0.92
  CompressorRPM5 2200
  CompressorATA5 1.15
  CompressorRPM6 2300
  CompressorATA6 1.23
  DisP0x 2400
  DisP0y 0
  DisP1x 0
  DisP1y 80
[IAR-1000A1]
HorsePowers 1000
Carburetor 3
RPMMin 400
  RPMNom 2300
  RPMMax 2300
  RPMMaxAllowed 2700
  Reductor 0.6675
  PropDiameter 3.1
  PropAnglerType 2
  Carburetor 3
PropAnglerSpeed 0.08
  PropAnglerMinParam 800.0
  PropAnglerMaxParam 2300.0
  PropPhiMin 16.0
  PropPhiMax 50.0
  PropAoA0 11.0
  CompressorPMax 1.37
  Voptimal 360.0
  CompressorAltitude0 3600.0
  CompressorMultiplier0 0.91
  CompressorRPMP0 2000.0
  CompressorRPMPMax 2300.0
  CompressorMaxATARPM 1.37
  CompressorSpeedManifold 0.6
  CompressorRPM0 400
  CompressorATA0 0.6
  CompressorRPM1 1200
  CompressorATA1 0.75
  CompressorRPM2 1400
  CompressorATA2 0.80
  CompressorRPM3 1600
  CompressorATA3 0.86
  CompressorRPM4 1800
  CompressorATA4 1.02
  CompressorRPM5 2200
  CompressorATA5 1.23
  CompressorRPM6 2300
  CompressorATA6 1.37
  DisP0x 2400
  DisP0y 0
  DisP1x 0
  DisP1y 80

In practice, inline 12 cylinders engines instead of doubel row radial 14 cylinders, with a compressor aimed at altitude 6200m for both the IAR81 and IAR80 and at 3600m for the othe IAR80 variants.

[Dreamk]

It's worth reading the various mails under the title "A straight technical approach to IAR 80, Mytha and reality" in the Romanian Military History Forum http://www.worldwar2.ro/forum/index.php?showtopic=5110 (in English) They are loaded with valuable info.

[Thunda]

Couple of interesting sites related:

http://www.ipmsstockholm.org/magazine/2005/01/stuff_eng_profile_iar80.htm

And this is good for specs, but its in Romanian (you can run it through BabelFish for a translation)

http://rumaniamilitary.wordpress.com/tag/iar-81/