Philtech V12 Engine Test Run
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- Опубликовано: 8 сен 2024
- This video demonstrates starting and running of the Philtech V12 engine.
It is a 108cc 2 stroke 12 cylinder model engine. It is suitable for 1/5 scale model aircraft like the P51 mustang. It runs on Methanol/Nitro methane model engine fuel.
This is the pre production prototype. Available early 2023.
Contact info@philtech.com.au
AS the RPM's rose so did the hairs on my neck. Awesome
That is freak'n awesome!
Nice engine, but cylinder colume is too low for realistic sound. Make it much bigger and for gas, not methanol.
It is not cylinder capacity that affects the sound as much as being two -stroke and the wrong firing order (for technical reasons, it could never be the R-R firing order).
For instance, this engine sounds like a Merlin:
ruclips.net/video/3dmEXi1jEwI/видео.html
it would be interesting to slow down the audio.
Look up Barrington Hares, he is a remarkable model engineer. This is an EXACT scale model of the Merlin, okay the spark plugs had to be modified, they do not scale well, but as far as I can tell the magnetos are scale, as is the supercharger and everything else.
After The Merlin, he built a model of the R-R Eagle 22, an H24 sleeve valve engine but I do not know whether he ever got it to run, there would be more scale problems here, the drag of the engine was massive, and I am not sure how he could get the fuel injection right . Look it up, the whole thing is epic.
One link, there are others
authenticscale.com/special-projects.html
I do not think this one doesn't sound as good.
ruclips.net/video/aKRhJMDCj6Q/видео.html
@@robertnicholson7733 Sorry, but no, different engine, different firing but same problem, low cylinder volume, so it sounds like small and high rpm engine.
@@Dzordzikk And you based this on?
i disagree with of your statement.
Here are some firing order simulations using just a ticking sound for the Merlin, Kestrel, etc, followed by the reverse tractor of the earlier Kestel, Eagle etc, followed a number of other v12s, there are plenty more on the site. The firing orders are the reverse of each other. The reverse tractor 131 Series Merlin used in the de Havilland Hornet does not count as the engine rotated the same direction as the 130 with an extra gear in the propellor reduction gearing reversing the direction of propellor rotation.
He erroreously included he Griffon with the Merlin but the Griffon has three different firing orders, none of which were similar to the Merlin's firing order.
normal tractor
ruclips.net/video/ksxD8O0Tan4/видео.html
reverse tractor
ruclips.net/video/gPYF2Furqfk/видео.html
Lamborghini
ruclips.net/video/nzRFWA5EewE/видео.html
Jaguar
ruclips.net/video/HQaPFwRekCA/видео.html
and just for fun a hypethetical inline 7
ruclips.net/video/JMOpladtjiQ/видео.html
The overal sound of the engine is determined by its firing order and exhaust arrangements as well as volume, valve overlap, etc. All the engines discussed here used short stub exhausts, thus exhaust arrangements have little to no effect on the comparitive sounds.
Exhaust arrangements can make massive changes to an engine sound, there are plenty of videos on uTube demonstrating this using real engines. Cross plane V8s with crossover exhausts sound nothing like the same engine with typical exhaust arrangements.
Volume of cylinders and rpm have an effect on pitch, but firing order and exhaust determines the metre of the engine, and people's perception and pattern recognition is more tuned to listening for metre than for pitch.
Maybe you should build one
Is that a real super charger on the front of that?
Do the cylinders fire in pairs?
Yes the cylinders do fire in pairs. This is to provide positive sump pressure for the 2 stroke induction part of the cycle. Also it sounds better as it gives 6 exhaust pulses per revolution. This engine runs at a max of 6500 RPM , a rolls royce merlin ran at about 3000 RPM .
@@PhiltechEnterprises I would have imagined it would sound like an Inline 6, given that the cylinders fire in pairs, but it really does sound like a 12.
Nice
Is it a camera illusion or was the prop oscillating back and forth?
Yes it is a camera illusion, dont ask me to explain it but the prop was not oscillating.
@@PhiltechEnterprises Shutter speed. Isn't everyone aware of that?
I would not be standing beside or in front of the prop..
As retired aircraft engineer we were alway taught not to stand in line with a prop, if it was to shed a blade in your direction that is game-over, this one could probably kill you too if that happened!