family uses Pratt & Whitney PW1000G engine, also used by MRJ, MS-21, A220, E-Jets airplanes. The PW1100G-JM used by the A320neo family has a diameter of 2,06 meters: Herpa A320neo family models, including the A320neo and the A321neo, have engines with a diameter of 5 millimeters (1:500 scale). 5 mm in 1:1 scale are (5 mm x 500) 2,5 meters, 44 centimeters larger in the real scale. Now, 2,06 meters are 2060 millimeters and, in 1:500 scale, 4,12 millimeters.
To conclude, Herpa A321neo should have engines with a diameter of 4,12 millimeters
: with this diameter, the exact replica of the 1:1 A321neo engine, the landing gear would be enough long to avoid to touch the ground.
family uses two engine types:
IAE V2500 diameter 1,50 to 1,61 meters
CFM56 diameter 1,54 to 1,73 meters
Herpa A320 family models have engines with a diameter of 4 millimeters; 4 mm are 2 meters in the real scale (4 x 500), considering a medium diameter of 1,60 meters in 1:1 scale, even for the A321ceo the engines are 40 cm largest, this means that in the 1:500 scale the engines of our A319, A320 and A321 models should be 3,2 millimeters wide.
Both Herpa 1:500 A320neo and A320ceo families have engines 0,8 millimeters largest than they should be, that is 1/5th largest of the real engines, like if Herpa models engines would be 40 centimeters largest of the 1:1 engines.
But i don't feel to complaint about this: i will never complaint for A320/321neo too large engines!
In my opinion Herpa had to do a choice: 4 mm for the A320ceo family and 5 mm for the A32oneo family. They could choose 3 mm for the A320ceo family and 4 mm for the A321neo family, but in this case the engines would have been too small. In my opinion Herpa decided for the better way: don't forget we are talking of millimeters and under millimeters, in 1:500 scale, there is the "microsurgery"! Maybe Herpa could release 4,12 millimeters engines for the neo family, but the costs would increase more and more.
I will never complaint with Herpa for the "too big" A320/321neo engines and i really don't understand how is it possible that many collectors think this is an intolerable mistake by Herpa, when the same collectors don't complain about liveries, airlines, special liveries before regular ones, always the same airlines (Lufthansa, Qantas, Emirates...), no enough "niche" and exotic airlines, too many widebodies and few narrowbodies, neos airlines, B737 classic and so on.
Their complaint is about a thing almost impossible to change and about a choice i consider perfrct by Herpa!
Said that, WOWair A321ceo
vs Azores Airlines A321neo
comparison, as requested: