[Brano]

These are 2 prs files

motor.Wright_Cyclone1820_Series.prs
motor.Wright_Cyclone1820_tb.prs

open first one for edit and look if you have proper *.wav files in it.For me it is different as I use custom soundmod and my wav files are changed to that of P&W 1830

example of prs file Wright Cyclone

[common]
mode relobj pos
type mixer
infinite 1
EAXMix 0.95
occlusion -9
occllf 0.25
eaxroom 0.5
obstruction -7
obstrlf 0

mutable 1

[spl]
107

[samples]
Merlin_XX_Starter.wav
Wright_Cyclone_1000.wav
Wright_Cyclone_1500.wav
Wright_Cyclone_2000.wav
Wright_Cyclone_2700.wav
Wright_Cyclone_2701.wav
xWright_Cyclone_1000.wav
xWright_Cyclone_1500.wav
xWright_Cyclone_2000.wav
xWright_Cyclone_2700.wav
xWright_Cyclone_2701.wav
M82_dmg.wav

[sample.Merlin_XX_Starter.wav]
infinite 1
controls rpm start

[sample.Merlin_XX_Starter.wav.rpm]
minlo 20
minhi 30
maxlo 150
maxhi 250
value 0.5
pmin 0.6
pmax 1.8

[sample.Merlin_XX_Starter.wav.start]
minlo 0
minhi 0.5
maxlo 1.5
maxhi 2.0
value 1.0
pmin 1.0
pmax 1.0

[sample.Wright_Cyclone_1000.wav]
infinite 1
env 8
controls rpm

[sample.Wright_Cyclone_1000.wav.rpm]
minlo 100
minhi 700
maxlo 1200
maxhi 1700
value 2.0
pmin -1.0
pmax 1000

[sample.Wright_Cyclone_1000.wav.start]
minlo 0
minhi 0.5
maxlo 1.5
maxhi 2.0
value 2.0
pmin 1.0
pmax 1.0

[sample.Wright_Cyclone_1500.wav]
infinite 1
env 8
controls rpm

[sample.Wright_Cyclone_1500.wav.rpm]
minlo 700
minhi 1200
maxlo 1500
maxhi 2000
value 3.0
pmin -1.0
pmax 1500

[sample.Wright_Cyclone_2000.wav]
infinite 1
env 8
controls rpm

[sample.Wright_Cyclone_2000.wav.rpm]
minlo 1300
minhi 2000
maxlo 2200
maxhi 2700
value 4.0
pmin -1.0
pmax 2000

[sample.Wright_Cyclone_2700.wav]
infinite 1
env 8
controls rpm

[sample.Wright_Cyclone_2700.wav.rpm]
minlo 1900
minhi 2400
maxlo 6000
maxhi 6500
value 5.0
pmin -1.0
pmax 2700

[sample.Wright_Cyclone_2701.wav]
infinite 1
env 8
controls rpm

[sample.Wright_Cyclone_2701.wav.rpm]
minlo 1400
minhi 2200
maxlo 6000
maxhi 6500
value 5.0
pmin -1.0
pmax 2700

[sample.xWright_Cyclone_1000.wav]
infinite 1
env 0 2
controls rpm

[sample.xWright_Cyclone_1000.wav.rpm]
minlo 100
minhi 700
maxlo 1000
maxhi 1600
value 2.0
pmin -1.0
pmax 1000

[sample.xWright_Cyclone_1000.wav.start]
minlo 0
minhi 0.5
maxlo 1.5
maxhi 4.0
value 2.0
pmin 1.0
pmax 1.0

[sample.xWright_Cyclone_1500.wav]
infinite 1
env 0 2
controls rpm

[sample.xWright_Cyclone_1500.wav.rpm]
minlo 250
minhi 800
maxlo 1000
maxhi 1900
value 3.0
pmin -1.0
pmax 1500

[sample.xWright_Cyclone_2000.wav]
infinite 1
env 0 2
controls rpm

[sample.xWright_Cyclone_2000.wav.rpm]
minlo 800
minhi 1600
maxlo 2000
maxhi 2500
value 4.0
pmin -1.0
pmax 2000


[sample.xWright_Cyclone_2700.wav]
infinite 1
env 0 2
controls rpm

[sample.xWright_Cyclone_2700.wav.rpm]
minlo 1800
minhi 2400
maxlo 6000
maxhi 6500
value 5.0
pmin -1.0
pmax 2700

[sample.xWright_Cyclone_2701.wav]
infinite 1
env 0 2
controls rpm

[sample.xWright_Cyclone_2701.wav.rpm]
minlo 1400
minhi 2400
maxlo 6000
maxhi 6500
value 7.0
pmin -1.0
pmax 2700



[sample.M82_dmg.wav]
infinite 1
controls rpm damage

[sample.M82_dmg.wav.rpm]
minlo 500
minhi 2000
maxlo 4000
maxhi 6000
value 2.0
pmin 0.4
pmax 2.2

[sample.M82_dmg.wav.damage]
minlo 0.1
minhi 0.6
maxlo 1.0
maxhi 2.0
value 2.0
pmin 1.0
pmax 1.0

[emit]
start

[emit.start]
speed 5
srand 0.15
vrand 0.1
prand 0.06
spl 85

num 3

sample0 an2_cyl_00.wav
sample1 an2_cyl_01.wav
sample2 an2_cyl_02.wav

PS:nice franken Flakiten,I like the working shock absorbers very much,did not see such fine animated gear on other a/c 8)