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[vonofterdingen]

I'm curious: what problem(s) are you trying to solve with this FM? I ask because as Larschance said, he and I are working with this aircraft in a BAT campaign right now and it seems fine. What are we missing?

[Vasya]

My documentation on the Wright Whirlwind engine is based on the book Jane's Fighting Aircraft of World War II edition 1946/47.
 There is a section  that is called All the World 's Aero Engine that provide details on the Wright Whirlwind series.
For the supercharger states "All models (except the R-760ET) are equipped with a General Electric supercharger geared by the crankshafts.
 Supercharger drives at seven to ten times crankshaft speed. On the airscrew states that there is provision for hydraulically controllable pitch airscrew.
 On the engine performance there is a table with 450h.p. at 2250 rpm for take off. 412h.p. at 2200 rpm as normal rating at sea level and 420h.p. at 2200rpm at 1400 ft. (430 m).
Compression ratio 6.3:1. Blower ratio 10.15:1. Engine dry weight 306 kg. Fuel 91 Octane.
I will try to post a scan of the page that is not easy as the book is large as usual for the Jane's publications.

I hope that your book contains scans of official documents from Wright Whirlwind.
Because I also have some tables for readers to familiarize themselves with.
https://drive.google.com/file/d/12G6_aU3opmtMHaQPAuevjUAHR3eH0qVd/view?usp=share_link
An airplane engine does not transmit torque to the wheels like a car does, but a piston aircraft engine turns a propeller that pushes air away,
 thereby creating thrust. The thrust capacity of the screw can be estimated if you know its diameter, revolutions and reduction ratio.
 So, for the CW-22 aircraft, you need to know which propeller was installed.
I think together we will be able to write a more accurate engine for the CW-22. 

[Frankiek]

"I'm curious: what problem(s) are you trying to solve with this FM? I ask because as Larschance said, he and I are working with this aircraft in a BAT campaign right now and it seems fine. What are we missing?"

The original FM has a few problems. On the Flight Model side the polares section seems more adequate for a fighter rather than a scout/trainer plane. I suppose that some parts of the fmd are derived from the CW-21 that is a fighter. The engine model is also problematic as far as performance is concerned 720hp versus a max of 450 in relation to real world data. So it ends up in a plane that is definitely  flyable but with an overall performance that seems overrated.

So I think that a little tweaking of the FM is needed but as usual this is not taking out anything from the modders that realized this nice model and nothing against others using and flying the plane as it is

Cheers

[Frankiek]

Vasya, i tried to scan but as mentioned the book is big and heavy and I am using my mobile phone for the scan so quality is not great. Jane's editions are considered to be a reliable source  on Military matters and is normally used a reference. In any case overall the engine performance data that we have is quite similar and be aware that I am considering the R-975-E3 engine

[Vasya]

 
(Дуже дякую!
Скажіть будь-ласка! - чи є у вашій книзі фото двигуна R-975E-3,
на якому я міг би побачити привідний компрессор?
https://drive.google.com/file/d/1sbhGJq4Tb2OxX3IhnlmpP6WkjlfTXgQK/view?usp=share_link
Можливо є посилання на документ, в якому написані дані щодо тиску
 який створював компрессор, графік висотності, температурні режими, розхід палива?
Це дуже важливо для правильного написання емд.
Також потрібні дані який гвинт ставили до цього двигуна на літак CW-22.
Як би мій дохід був не 220 долярів на місяць(проживаю у дуже бідній країні),
 а вище, то купив би книгу для двигуна R-975E-3, а також інші документи.
Але на жаль фінансові труднощі інколи  не дозволяють мені мати потрібні документи, тому користуюся безоплатними.
Якщо ви зможете знайти достовірну технічну інформацію щодо літака CW-22 та його двигуна, то ми зможемо правильно її записати в емд та фмд. )
Thank you very much!
Tell me please! - is there a photo of the R-975E-3 engine in your book,
on which I could see the drive compressor?
Perhaps there is a link to a document in which data is written about the pressure created by the compressor, the altitude graph, temperature regimes, fuel consumption?
This is very important for the correct spelling of emd.
We also need data on which propeller was put on this engine on the CW-22 aircraft.
If my income were not 220 dollars a month (I live in a very poor country), but higher, I would buy a book for the R-975E-3 engine, as well as other documents.
But unfortunately, financial difficulties sometimes do not allow me to have the necessary documents, so I use free ones.
If you can find reliable technical information about the CW-22 aircraft and its engine, then we can correctly record it in emd and fmd.
https://www.ebay.com/itm/125740527349

[Frankiek]

In the first pic you can see two images of the R-975E-3 engine. On the left side you can see the General Electric compressor that (similar to the one in your pic) and below the compressor the Stromberg Carburetor as mentioned in the text. Considering that the compressor was standard I am quite sure that we can use data from similar engines of that period. For the airscrew we can assume the use of a standard 2-bladed variable-pitch metal propeller as was the case for the SNC-1. Even if approximate these are reasonable estimates. I will continue searching

[Vasya]

In the first pic you can see two images of the R-975E-3 engine. On the left side you can see the General Electric compressor that (similar to the one in your pic) and below the compressor the Stromberg Carburetor as mentioned in the text. Considering that the compressor was standard I am quite sure that we can use data from similar engines of that period. For the airscrew we can assume the use of a standard 2-bladed variable-pitch metal propeller as was the case for the SNC-1. Even if approximate these are reasonable estimates. I will continue searching

(Буду чекати від вас документи для двигуна R-975E-3, за якими ми змогли б точно записати в ємд історично правильні характеристики, а не наші фантазії.
І ще: стандартний компрессор для двигунів Wright-Cyclone мав висотність від 1700 до 2900 метрів в залежності від наддува.
Тому для правильного написання двигуна R-975E-3 потрібна фірмова документація, а не книжки для широкого загалу читачів.)
---------------
I will wait for the documents for the R-975E-3 engine from you, according to which we would be able to accurately record historically correct characteristics in the EMD, and not our fantasies.
And one more thing: the standard compressor for Wright-Cyclone engines had an altitude of 1,700 to 2,900 meters, depending on boost.
Therefore, the correct spelling of the R-975E-3 engine requires proprietary documentation, not books for the general public.