sixstrings5859
Charter Member
Hello Friends, What are the best Spitfire Mk I/II sounds that can be had for CFS3 BoB Mk1 ? Like Lawdog's , but are there any better ! Regards,Scott
Sounds for a Spitfire Mk 1 Question ?
- Thread starter sixstrings5859
- Start date
greycap.raf
Charter Member
The sound doesn't really change all that much between different Merlin versions, the development was mainly on superchargers and the supercharger itself doesn't produce noticable noise over the exhaust and propeller. It's mainly the increased boost that gives extra "bite" to the sound but then again the Merlin III in Spitfire Mk I was already running at +12 lbs on emergency power, not that much less than the later models as long as 150 grade fuel isn't considered.
sixstrings5859
Charter Member
Correct Rene !
gecko
Charter Member
I did a set for the SJ Spitfire Mk.II and Mk.V that I believe will work on other aircraft as well. It is however very tightly tuned to the engine parameters of the FM of those specific aircraft, so there may be some oddities if used elsewhere. You're of course welcome to try. It's all in the ear of the beholder naturally, but this set does do two things that I'm not aware have been done in other sets.
The first is that most of the sound change comes from RPM changes as opposed to manifold pressure (boost/throttle position), which I think is what nearly every other sound set for FS and CFS aircraft does. You get a lot of sound just from the engine and propeller turning at high RPM, even if the fuel or ignition is cut (though you do have to dive steeply to get it going that fast without power). Remember at that point, the engine is really just a huge wind-driven air pump, and there is more going on than a faint whisper of a fan. This is true to life with constant-speed propeller aircraft, where throttle changes (if they don't also temporarily impact RPM) take a careful ear to hear, whereas even a 100 RPM change is easily noticed. This also meshes exactly with Rene's point. The max governed RPM on all Merlins (except maybe some post-war versions?) was 3,000 RPM from when the first RPM governors were installed on Merlins. A little extra bite, as he says, is all you'll hear from the increased horsepower. That little extra noise between different variants in the SJ series is still modeled into the set. Running at +18 lbs in the LF.Mk.VB does sound stronger than +12 lbs in an early Mk.VB, but not by a huge margin.
In my subjective opinion, I do think there's a little change at and near idle depending on different exhaust configurations used on different Mks.
The second feature is the crackling sound you briefly hear when the pilot pulls the throttle fully to idle when landing. This has to do with the relationship of throttle setting, airspeed, and RPM which creates that effect on the engine at that specific moment. You won't hear it if you're at idle sitting still, you have to be moving, and it will come into effect at different throttle settings depending on your airspeed and RPM. It will show up quite early and strongly if you are in full flight and pull the throttle too far back. This is another true to life effect that occurs when the oncoming airflow is driving the prop harder than the engine itself is. The engine doesn't like that and starts crackling at you to let you know what you did wrong. Hearing that at landing is the tiny, very tail end of that effect, and depending on your landing technique, you might hear it, or you might not, which you will notice is true of real Spitfire landings as well as of other similar aircraft. The tuning of this effect might not be quite right outside of the SJ Spitfire II/V.
The first is that most of the sound change comes from RPM changes as opposed to manifold pressure (boost/throttle position), which I think is what nearly every other sound set for FS and CFS aircraft does. You get a lot of sound just from the engine and propeller turning at high RPM, even if the fuel or ignition is cut (though you do have to dive steeply to get it going that fast without power). Remember at that point, the engine is really just a huge wind-driven air pump, and there is more going on than a faint whisper of a fan. This is true to life with constant-speed propeller aircraft, where throttle changes (if they don't also temporarily impact RPM) take a careful ear to hear, whereas even a 100 RPM change is easily noticed. This also meshes exactly with Rene's point. The max governed RPM on all Merlins (except maybe some post-war versions?) was 3,000 RPM from when the first RPM governors were installed on Merlins. A little extra bite, as he says, is all you'll hear from the increased horsepower. That little extra noise between different variants in the SJ series is still modeled into the set. Running at +18 lbs in the LF.Mk.VB does sound stronger than +12 lbs in an early Mk.VB, but not by a huge margin.
In my subjective opinion, I do think there's a little change at and near idle depending on different exhaust configurations used on different Mks.
The second feature is the crackling sound you briefly hear when the pilot pulls the throttle fully to idle when landing. This has to do with the relationship of throttle setting, airspeed, and RPM which creates that effect on the engine at that specific moment. You won't hear it if you're at idle sitting still, you have to be moving, and it will come into effect at different throttle settings depending on your airspeed and RPM. It will show up quite early and strongly if you are in full flight and pull the throttle too far back. This is another true to life effect that occurs when the oncoming airflow is driving the prop harder than the engine itself is. The engine doesn't like that and starts crackling at you to let you know what you did wrong. Hearing that at landing is the tiny, very tail end of that effect, and depending on your landing technique, you might hear it, or you might not, which you will notice is true of real Spitfire landings as well as of other similar aircraft. The tuning of this effect might not be quite right outside of the SJ Spitfire II/V.
Last edited:
sixstrings5859
Charter Member
Chose the SJ Spitfire sounds. They are very good. Love the whole SJ Spitfire series ! Thanks guys !