The Evolution of Piston Aircraft Engines: Development, Performance Indicators, and Technological Advancements
31 mar 2025
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Publicado en línea: 31 mar 2025
Páginas: 1 - 26
Recibido: 18 sept 2024
Aceptado: 18 ene 2025
DOI: https://doi.org/10.2478/tar-2025-0001
Palabras clave
© 2025 Jakub Pełczyński, published by Sciendo
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.
Fig. 1.
![Changes in the power [hp] of aircraft engines in the period 1903–1918 [7, 12, 15, 26, 29,30,31, 33,34,35,36,37,38,39,40,41,42].](https://sciendo-parsed.s3.eu-central-1.amazonaws.com/67f6ed7c8d1bec042eaca24e/j_tar-2025-0001_fig_001.jpg?X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Content-Sha256=UNSIGNED-PAYLOAD&X-Amz-Credential=AKIA6AP2G7AKOUXAVR44%2F20250908%2Feu-central-1%2Fs3%2Faws4_request&X-Amz-Date=20250908T234718Z&X-Amz-Expires=3600&X-Amz-Signature=d9f1d17c290099b1cde5a6b97d16dbc80ee089586765411501306859529370d4&X-Amz-SignedHeaders=host&x-amz-checksum-mode=ENABLED&x-id=GetObject)
Fig. 2.
![Changes in the ratio of aircraft engines’ power to their weight [hp/kg] in the period 1903–1918 [7, 12, 15, 26, 29,30,31, 33,34,35,36,37,38,39,40,41,42].](https://sciendo-parsed.s3.eu-central-1.amazonaws.com/67f6ed7c8d1bec042eaca24e/j_tar-2025-0001_fig_002.jpg?X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Content-Sha256=UNSIGNED-PAYLOAD&X-Amz-Credential=AKIA6AP2G7AKOUXAVR44%2F20250908%2Feu-central-1%2Fs3%2Faws4_request&X-Amz-Date=20250908T234718Z&X-Amz-Expires=3600&X-Amz-Signature=18206c0d17c227fb8f98d28189815d9a846d20822904df2fbb1e9d2240b92d52&X-Amz-SignedHeaders=host&x-amz-checksum-mode=ENABLED&x-id=GetObject)
Fig. 3.
![Changes in the ratio of aircraft engines’ power to their displacement volume [hp/dm3] in the period 1903–1918 [7, 12, 15, 26, 29,30,31, 33,34,35,36,37,38,39,40,41,42].](https://sciendo-parsed.s3.eu-central-1.amazonaws.com/67f6ed7c8d1bec042eaca24e/j_tar-2025-0001_fig_003.jpg?X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Content-Sha256=UNSIGNED-PAYLOAD&X-Amz-Credential=AKIA6AP2G7AKOUXAVR44%2F20250908%2Feu-central-1%2Fs3%2Faws4_request&X-Amz-Date=20250908T234718Z&X-Amz-Expires=3600&X-Amz-Signature=244f0cd94da71fe363c853e50f1eeca2d81bc29900584541f5c66904817d1832&X-Amz-SignedHeaders=host&x-amz-checksum-mode=ENABLED&x-id=GetObject)
Fig. 4.
![Changes in maximum revolutions per minute of the crankshaft [rpm] of aircraft engines in the period 1903–1918 [7, 12, 15, 26, 29,30,31, 33,34,35,36,37,38,39,40,41,42].](https://sciendo-parsed.s3.eu-central-1.amazonaws.com/67f6ed7c8d1bec042eaca24e/j_tar-2025-0001_fig_004.jpg?X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Content-Sha256=UNSIGNED-PAYLOAD&X-Amz-Credential=AKIA6AP2G7AKOUXAVR44%2F20250908%2Feu-central-1%2Fs3%2Faws4_request&X-Amz-Date=20250908T234718Z&X-Amz-Expires=3600&X-Amz-Signature=7447eda538439a617cfa757a29a166dd6138299ef489725d8498d765e0ece98a&X-Amz-SignedHeaders=host&x-amz-checksum-mode=ENABLED&x-id=GetObject)
Fig. 5.
![Changes in power [hp] of radial and inline engines in the period 1903–1918 [7, 12, 15, 26, 29,30,31, 33,34,35,36,37,38,39,40,41,42].](https://sciendo-parsed.s3.eu-central-1.amazonaws.com/67f6ed7c8d1bec042eaca24e/j_tar-2025-0001_fig_005.jpg?X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Content-Sha256=UNSIGNED-PAYLOAD&X-Amz-Credential=AKIA6AP2G7AKOUXAVR44%2F20250908%2Feu-central-1%2Fs3%2Faws4_request&X-Amz-Date=20250908T234718Z&X-Amz-Expires=3600&X-Amz-Signature=b7d5fae63b082709016da77189316f5b0698e0e4844966f02d664937033662a2&X-Amz-SignedHeaders=host&x-amz-checksum-mode=ENABLED&x-id=GetObject)
Fig. 6.
![Changes in the ratio of radial and inline engines to their displacement volume [hp/dm3] in the period 1903–1918 [7, 12, 15, 26, 29,30,31, 33,34,35,36,37,38,39,40,41,42].](https://sciendo-parsed.s3.eu-central-1.amazonaws.com/67f6ed7c8d1bec042eaca24e/j_tar-2025-0001_fig_006.jpg?X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Content-Sha256=UNSIGNED-PAYLOAD&X-Amz-Credential=AKIA6AP2G7AKOUXAVR44%2F20250908%2Feu-central-1%2Fs3%2Faws4_request&X-Amz-Date=20250908T234718Z&X-Amz-Expires=3600&X-Amz-Signature=01afa9bb8b876c5d4ca82598e01689be7fb280a585e7072623644020d775f14f&X-Amz-SignedHeaders=host&x-amz-checksum-mode=ENABLED&x-id=GetObject)
Fig. 7.
![Changes in the ratio of radial and inline engines’ power to their weight [hp/kg] in the period 1903–1918 [7, 12, 15, 26, 29,30,31, 33,34,35,36,37,38,39,40,41,42].](https://sciendo-parsed.s3.eu-central-1.amazonaws.com/67f6ed7c8d1bec042eaca24e/j_tar-2025-0001_fig_007.jpg?X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Content-Sha256=UNSIGNED-PAYLOAD&X-Amz-Credential=AKIA6AP2G7AKOUXAVR44%2F20250908%2Feu-central-1%2Fs3%2Faws4_request&X-Amz-Date=20250908T234718Z&X-Amz-Expires=3600&X-Amz-Signature=3f68523f3e16867aa62854fbbf5a112c92e13f879973601fabf213aab53ea5e5&X-Amz-SignedHeaders=host&x-amz-checksum-mode=ENABLED&x-id=GetObject)
Fig. 8.
![Changes in power [hp] of aircraft engines in the period 1918–1939 [1,2,3,4, 10– 13,14,15,16,17, 27,28,29,30,31, 49, 51, 54,55,56,57,58,59,60,61,62,63,64,65,66,67,68].](https://sciendo-parsed.s3.eu-central-1.amazonaws.com/67f6ed7c8d1bec042eaca24e/j_tar-2025-0001_fig_008.jpg?X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Content-Sha256=UNSIGNED-PAYLOAD&X-Amz-Credential=AKIA6AP2G7AKOUXAVR44%2F20250908%2Feu-central-1%2Fs3%2Faws4_request&X-Amz-Date=20250908T234718Z&X-Amz-Expires=3600&X-Amz-Signature=24e0f7f9aad3cc5fafb8d1889b8148610030ee985cac273b27d69a351b881b14&X-Amz-SignedHeaders=host&x-amz-checksum-mode=ENABLED&x-id=GetObject)
Fig. 9.
![Changes in the ratio of aircraft engines’ power to their weight [hp/kg] in the period 1918–1939 [1,2,3,4, 10, 13,14,15,16,17, 27,28,29,30,31, 49, 51, 54,55,56,57,58,59,60,61,62,63,64,65,66,67,68].](https://sciendo-parsed.s3.eu-central-1.amazonaws.com/67f6ed7c8d1bec042eaca24e/j_tar-2025-0001_fig_009.jpg?X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Content-Sha256=UNSIGNED-PAYLOAD&X-Amz-Credential=AKIA6AP2G7AKOUXAVR44%2F20250908%2Feu-central-1%2Fs3%2Faws4_request&X-Amz-Date=20250908T234718Z&X-Amz-Expires=3600&X-Amz-Signature=191492a625a28520837eb88690af117c366660e30762c0dec2585e3f86410a1b&X-Amz-SignedHeaders=host&x-amz-checksum-mode=ENABLED&x-id=GetObject)
Fig. 10.
![Changes in the ratio of aircraft engines’ power to their displacement volume [hp/dm3] in the period 1918–1939 [1,2,3,4, 10, 13,14,15,16,17, 27,28,29,30,31, 49, 51, 54,55,56,57,58,59,60,61,62,63,64,65,66,67,68].](https://sciendo-parsed.s3.eu-central-1.amazonaws.com/67f6ed7c8d1bec042eaca24e/j_tar-2025-0001_fig_010.jpg?X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Content-Sha256=UNSIGNED-PAYLOAD&X-Amz-Credential=AKIA6AP2G7AKOUXAVR44%2F20250908%2Feu-central-1%2Fs3%2Faws4_request&X-Amz-Date=20250908T234718Z&X-Amz-Expires=3600&X-Amz-Signature=349c3fa650d219f2456c73fe8ebfded624cb5f406eaa93c182142768c04a868f&X-Amz-SignedHeaders=host&x-amz-checksum-mode=ENABLED&x-id=GetObject)
Fig. 11.
![Changes in maximum revolutions per minute of the crankshaft [rpm] of aircraft engines in the period 1918–1939 [1,2,3,4, 10, 13,14,15,16,17, 27,28,29,30,31, 49, 51, 54,55,56,57,58,59,60,61,62,63,64,65,66,67,68].](https://sciendo-parsed.s3.eu-central-1.amazonaws.com/67f6ed7c8d1bec042eaca24e/j_tar-2025-0001_fig_011.jpg?X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Content-Sha256=UNSIGNED-PAYLOAD&X-Amz-Credential=AKIA6AP2G7AKOUXAVR44%2F20250908%2Feu-central-1%2Fs3%2Faws4_request&X-Amz-Date=20250908T234718Z&X-Amz-Expires=3600&X-Amz-Signature=16b3918735e28ea5d4197865c4b103bf6e271104c6bb5c42d04e5dad6f4643d9&X-Amz-SignedHeaders=host&x-amz-checksum-mode=ENABLED&x-id=GetObject)
Fig. 12.
![Changes in power [hp] of radial and inline engines in the period 1918–1939 [1,2,3,4, 10, 13,14,15,16,17, 27,28,29,30,31, 49, 51, 54,55,56,57,58,59,60,61,62,63,64,65,66,67,68].](https://sciendo-parsed.s3.eu-central-1.amazonaws.com/67f6ed7c8d1bec042eaca24e/j_tar-2025-0001_fig_012.jpg?X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Content-Sha256=UNSIGNED-PAYLOAD&X-Amz-Credential=AKIA6AP2G7AKOUXAVR44%2F20250908%2Feu-central-1%2Fs3%2Faws4_request&X-Amz-Date=20250908T234718Z&X-Amz-Expires=3600&X-Amz-Signature=c55976e65da27cfb27124ef2a3356cd5a5b91dc2637ee6236953058df9e94d6b&X-Amz-SignedHeaders=host&x-amz-checksum-mode=ENABLED&x-id=GetObject)
Fig. 13.
![Changes in the ratio of radial and inline engines’ power to their weight [hp/kg] in the period 1918–1939 [1,2,3,4, 10, 13,14,15,16,17, 27,28,29,30,31, 49, 51, 54,55,56,57,58,59,60,61,62,63,64,65,66,67,68].](https://sciendo-parsed.s3.eu-central-1.amazonaws.com/67f6ed7c8d1bec042eaca24e/j_tar-2025-0001_fig_013.jpg?X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Content-Sha256=UNSIGNED-PAYLOAD&X-Amz-Credential=AKIA6AP2G7AKOUXAVR44%2F20250908%2Feu-central-1%2Fs3%2Faws4_request&X-Amz-Date=20250908T234718Z&X-Amz-Expires=3600&X-Amz-Signature=2b0bec86207f89141cbd3c4abbf4d8132301e2cc5bfc465c66fd1d783706ea16&X-Amz-SignedHeaders=host&x-amz-checksum-mode=ENABLED&x-id=GetObject)
Fig. 14.
![Changes in the ratio of radial and inline engines to their displacement volume [hp/dm3] in the period 1918–1939 [1,2,3,4, 10, 13,14,15,16,17, 27,28,29,30,31, 49, 51, 54,55,56,57,58,59,60,61,62,63,64,65,66,67,68].](https://sciendo-parsed.s3.eu-central-1.amazonaws.com/67f6ed7c8d1bec042eaca24e/j_tar-2025-0001_fig_014.jpg?X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Content-Sha256=UNSIGNED-PAYLOAD&X-Amz-Credential=AKIA6AP2G7AKOUXAVR44%2F20250908%2Feu-central-1%2Fs3%2Faws4_request&X-Amz-Date=20250908T234718Z&X-Amz-Expires=3600&X-Amz-Signature=6cdecd054c7ecfcac22d578838f9158f80d858dbf4405f52efa7441ffd11dee2&X-Amz-SignedHeaders=host&x-amz-checksum-mode=ENABLED&x-id=GetObject)
Fig. 15.
![Changes in maximum revolutions per minute of the crankshaft [rpm] of radial and inline engines in the period 1918–1939 [1,2,3,4, 10, 13,14,15,16,17, 27,28,29,30,31, 49, 51, 54,55,56,57,58,59,60,61,62,63,64,65,66,67,68].](https://sciendo-parsed.s3.eu-central-1.amazonaws.com/67f6ed7c8d1bec042eaca24e/j_tar-2025-0001_fig_015.jpg?X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Content-Sha256=UNSIGNED-PAYLOAD&X-Amz-Credential=AKIA6AP2G7AKOUXAVR44%2F20250908%2Feu-central-1%2Fs3%2Faws4_request&X-Amz-Date=20250908T234718Z&X-Amz-Expires=3600&X-Amz-Signature=2341d15643ad8b92fe3d49d2c7e356cf78aa111b94a541d5f3923316dd4b7ce7&X-Amz-SignedHeaders=host&x-amz-checksum-mode=ENABLED&x-id=GetObject)
Fig. 16.
![Changes in power [hp] of aircraft engines in the period 1939–1945 [1,2,3,4,5, 14, 17, 21, 24, 28, 29, 45, 49,50,51,52, 58, 66,67,68,69,70, 73,74,75,76,77,78,79,80,81,82,83,84,85,86,87,88,89].](https://sciendo-parsed.s3.eu-central-1.amazonaws.com/67f6ed7c8d1bec042eaca24e/j_tar-2025-0001_fig_016.jpg?X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Content-Sha256=UNSIGNED-PAYLOAD&X-Amz-Credential=AKIA6AP2G7AKOUXAVR44%2F20250908%2Feu-central-1%2Fs3%2Faws4_request&X-Amz-Date=20250908T234718Z&X-Amz-Expires=3600&X-Amz-Signature=cf6091ee9b9b3c7327d0bed397f0deff888d76e20c05cbae9aaeb0bc363191cd&X-Amz-SignedHeaders=host&x-amz-checksum-mode=ENABLED&x-id=GetObject)
Fig. 17.
![Changes in the ratio of aircraft engines’ power to their weight [hp/kg] in the period 1939–1945 [1,2,3,4,5, 14, 17, 21, 24, 28, 29, 45, 49,50,51,52, 58, 66,67,68,69,70, 73,74,75,76,77,78,79,80,81,82,83,84,85,86,87,88,89].](https://sciendo-parsed.s3.eu-central-1.amazonaws.com/67f6ed7c8d1bec042eaca24e/j_tar-2025-0001_fig_017.jpg?X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Content-Sha256=UNSIGNED-PAYLOAD&X-Amz-Credential=AKIA6AP2G7AKOUXAVR44%2F20250908%2Feu-central-1%2Fs3%2Faws4_request&X-Amz-Date=20250908T234718Z&X-Amz-Expires=3600&X-Amz-Signature=33f9f5b61f0054dfcc90f2bffbeb17649323f9e8dafcd738451e0f053d47b96a&X-Amz-SignedHeaders=host&x-amz-checksum-mode=ENABLED&x-id=GetObject)
Fig. 18.
![Changes in the ratio of aircraft engines’ power to their displacement volume [hp/dm3] 1939–1945 [1,2,3,4,5, 14, 17, 21, 24, 28, 29, 45, 49,50,51,52, 58, 66,67,68,69,70, 73,74,75,76,77,78,79,80,81,82,83,84,85,86,87,88,89].](https://sciendo-parsed.s3.eu-central-1.amazonaws.com/67f6ed7c8d1bec042eaca24e/j_tar-2025-0001_fig_018.jpg?X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Content-Sha256=UNSIGNED-PAYLOAD&X-Amz-Credential=AKIA6AP2G7AKOUXAVR44%2F20250908%2Feu-central-1%2Fs3%2Faws4_request&X-Amz-Date=20250908T234718Z&X-Amz-Expires=3600&X-Amz-Signature=7baa619fc713e10d1e24df35c9a9cfa1d9cd1f63e17cf665b406db4d11b851c4&X-Amz-SignedHeaders=host&x-amz-checksum-mode=ENABLED&x-id=GetObject)
Fig. 19.
![Changes in maximum revolutions per minute of the crankshaft [rpm] of aircraft engines in the period 1939–1945 [1,2,3,4,5, 14, 17, 21, 24, 28, 29, 45, 49,50,51,52, 58, 66,67,68,69,70, 73,74,75,76,77,78,79,80,81,82,83,84,85,86,87,88,89].](https://sciendo-parsed.s3.eu-central-1.amazonaws.com/67f6ed7c8d1bec042eaca24e/j_tar-2025-0001_fig_019.jpg?X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Content-Sha256=UNSIGNED-PAYLOAD&X-Amz-Credential=AKIA6AP2G7AKOUXAVR44%2F20250908%2Feu-central-1%2Fs3%2Faws4_request&X-Amz-Date=20250908T234718Z&X-Amz-Expires=3600&X-Amz-Signature=55e5a8ce1904e07877eaf79c91ac7c10468035d3c7ea42578eb994ba22b93ce9&X-Amz-SignedHeaders=host&x-amz-checksum-mode=ENABLED&x-id=GetObject)
Fig. 20.
![Changes in power [hp] of radial and inline engines in the period 1939–1945 [1,2,3,4,5, 14, 17, 21, 24, 28, 29, 45, 49,50,51,52, 58, 66,67,68,69,70, 73,74,75,76,77,78,79,80,81,82,83,84,85,86,87,88,89].](https://sciendo-parsed.s3.eu-central-1.amazonaws.com/67f6ed7c8d1bec042eaca24e/j_tar-2025-0001_fig_020.jpg?X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Content-Sha256=UNSIGNED-PAYLOAD&X-Amz-Credential=AKIA6AP2G7AKOUXAVR44%2F20250908%2Feu-central-1%2Fs3%2Faws4_request&X-Amz-Date=20250908T234718Z&X-Amz-Expires=3600&X-Amz-Signature=cdb0cea752cd93379a1b8dfa3ce7398fa5f8d0172b1fd464beb4a7c30aca47a9&X-Amz-SignedHeaders=host&x-amz-checksum-mode=ENABLED&x-id=GetObject)
Fig. 21.
![Changes in the ratio of radial and inline engines to their displacement volume [hp/dm3] in the period 1939–1945 [1,2,3,4,5, 14, 17, 21, 24, 28, 29, 45, 49,50,51,52, 58, 66,67,68,69,70, 73,74,75,76,77,78,79,80,81,82,83,84,85,86,87,88,89].](https://sciendo-parsed.s3.eu-central-1.amazonaws.com/67f6ed7c8d1bec042eaca24e/j_tar-2025-0001_fig_021.jpg?X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Content-Sha256=UNSIGNED-PAYLOAD&X-Amz-Credential=AKIA6AP2G7AKOUXAVR44%2F20250908%2Feu-central-1%2Fs3%2Faws4_request&X-Amz-Date=20250908T234718Z&X-Amz-Expires=3600&X-Amz-Signature=5baeb57ac61ed2dc5b41f3d576911bae461b1f3b315ac3ae4ee13bdda31d9583&X-Amz-SignedHeaders=host&x-amz-checksum-mode=ENABLED&x-id=GetObject)
Fig. 22.
![Changes in the ratio of radial and inline engines’ power to their weight [hp/kg] in the period 1939–1945 [1,2,3,4,5, 14, 17, 21, 24, 28, 29, 45, 49,50,51,52, 58, 66,67,68,69,70, 73,74,75,76,77,78,79,80,81,82,83,84,85,86,87,88,89].](https://sciendo-parsed.s3.eu-central-1.amazonaws.com/67f6ed7c8d1bec042eaca24e/j_tar-2025-0001_fig_022.jpg?X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Content-Sha256=UNSIGNED-PAYLOAD&X-Amz-Credential=AKIA6AP2G7AKOUXAVR44%2F20250908%2Feu-central-1%2Fs3%2Faws4_request&X-Amz-Date=20250908T234718Z&X-Amz-Expires=3600&X-Amz-Signature=5ce3783f2b1cfa6880168be7be26ed87494f0dac29053b6f55b1dce9c79bc841&X-Amz-SignedHeaders=host&x-amz-checksum-mode=ENABLED&x-id=GetObject)
Fig. 23.
![Changes in maximum revolutions per minute of the crankshaft [rpm] of radial and inline engines in the period 1939–1945 [1,2,3,4,5, 14, 17, 21, 24, 28, 29, 45, 49,50,51,52, 58, 66,67,68,69,70, 73,74,75,76,77,78,79,80,81,82,83,84,85,86,87,88,89].](https://sciendo-parsed.s3.eu-central-1.amazonaws.com/67f6ed7c8d1bec042eaca24e/j_tar-2025-0001_fig_023.jpg?X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Content-Sha256=UNSIGNED-PAYLOAD&X-Amz-Credential=AKIA6AP2G7AKOUXAVR44%2F20250908%2Feu-central-1%2Fs3%2Faws4_request&X-Amz-Date=20250908T234718Z&X-Amz-Expires=3600&X-Amz-Signature=64db1b6db5722ba226fff80ffd266b3f022ea41cd7072938662d3bc9c21db32e&X-Amz-SignedHeaders=host&x-amz-checksum-mode=ENABLED&x-id=GetObject)
Fig. 24.
![Changes in power [hp] of aircraft engines in the years 1903–1945 [1,2,3,4,5, 7, 10, 12,13,14,15,16,17, 21, 24, 26,27,28,29,30,31, 33,34,35,36,37,38,39,40,41,42, 45, 49,50,51,52, 54,55,56,57,58,59,60,61,62,63,64,65,66,67,68,69,70, 73,74,75,76,77,78,79,80,81,82,83,84,85,86,87,88,89].](https://sciendo-parsed.s3.eu-central-1.amazonaws.com/67f6ed7c8d1bec042eaca24e/j_tar-2025-0001_fig_024.jpg?X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Content-Sha256=UNSIGNED-PAYLOAD&X-Amz-Credential=AKIA6AP2G7AKOUXAVR44%2F20250908%2Feu-central-1%2Fs3%2Faws4_request&X-Amz-Date=20250908T234718Z&X-Amz-Expires=3600&X-Amz-Signature=b5c8adcfc782d4b1f1579db52e607fb26029291149040858d6d7486b7684e258&X-Amz-SignedHeaders=host&x-amz-checksum-mode=ENABLED&x-id=GetObject)
Fig. 25.
![Changes in the ratio of aircraft engines’ power to their displacement volume [hp/dm3] in the years 1903–1945 [1,2,3,4,5, 7, 10, 12,13,14,15,16,17, 21, 24, 26,27,28,29,30,31, 33,34,35,36,37,38,39,40,41,42, 45, 49,50,51,52, 54,55,56,57,58,59,60,61,62,63,64,65,66,67,68,69,70, 73,74,75,76,77,78,79,80,81,82,83,84,85,86,87,88,89].](https://sciendo-parsed.s3.eu-central-1.amazonaws.com/67f6ed7c8d1bec042eaca24e/j_tar-2025-0001_fig_025.jpg?X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Content-Sha256=UNSIGNED-PAYLOAD&X-Amz-Credential=AKIA6AP2G7AKOUXAVR44%2F20250908%2Feu-central-1%2Fs3%2Faws4_request&X-Amz-Date=20250908T234718Z&X-Amz-Expires=3600&X-Amz-Signature=37d82477dcc1c0e58bbd3c779e01b3fa681ef1444f7c77826f8b1eac3bf8e904&X-Amz-SignedHeaders=host&x-amz-checksum-mode=ENABLED&x-id=GetObject)
Comparison of the Manly-Balzer and Wright Flyer I engines [1, 14, 16, 19–20]_
Manly-Balzer | Wright Flyer I | |
---|---|---|
52 | 16 | |
62 | 81.4 | |
8.85 | 3.28 | |
950 | 1025 | |
0.839 | 0.197 | |
5.876 | 4.878 | |
7.006 | 24.817 |