Lee Precision Engineering - CNC Airbreak Piston Head
Dalla Gran Bretagna arriva la produzione di questa particolare testa pistone che , "spezzando" l'aria, riduce il rumore in uscita e diminuisce lo stress di tutti i componenti del GB. La descrizione sotto risponde a tutte le vostre domande sul funzionamento e vantaggi.
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DescriptionThis product is currently available for pre-order and will be ready for dispatch on 21/01/2011
LPE Piston heads are an original design being the first AEG piston heads commercially made which are designed to be adjusted for AOE (angle of engagement) easily while remaining securely centred on the piston. The conventional design for the rear of the piston head has been done away with and replaced with an extended locator and a lightweight aluminium bushing in-place of heavier steel thrust bearings, this allows for 0 – 5mm of AOE adjustment using shims between the piston and piston head.
8 Lightweight laser cut AOE Shims are supplied with this piston head (4x 0.38mm and 4x 0.50mm)
As with all LPE products these are CNC machined in the United Kingdom from high quality billet materials on commercial machines.
What is an airbrake piston head?
Airbrake piston heads are much like standard piston heads but with the addition of a second 'piston' on the front which acts as a suppressor in the gearbox.
How does it work?
Towards the end of the forward piston stroke the front of the piston head enters the cylinder head and reduces the airflow out of the nozzle, this creates a cushion of air in-front of the piston which slows it down before it impacts the cylinder head resulting in a reduction of sound from the gearbox.
What are the advantages?
For players who prefer their AEGs to be quiet the biggest advantage is the sound reduction from the gearbox, the area where most of the sound is created. Airbrake piston heads also offer a fit & forget alternative to adding foam padding onto the cylinder head which can wear down over time or even fall off if it is not fixed on securely, an airbrake will give consistent performance and perform the same after thousands of rounds as it will straight after installation when set up correctly.
Another advantage is the reduced stress on gearbox shells from the slower piston impact speeds, particularly useful in V2 gearboxes which are known for cracking around the cylinder windows.
Looks good! Is there anything else I should know?
As is often the case with AEGs performance of airbrake piston heads will vary from gearbox to gearbox.
The type of cylinder head will have an effect on the braking, flat cylinder heads are recommended to give maximum sound reduction, aero cylinder heads (also known as 'silent' cylinder heads) will also work but the reduction will be lower. Airbrakes also reduce the effective cylinder volume which will in most cases cause a drop in fps, this however will also occur with foam padding so any fps drop is negligible if you are looking to build a quiet gearbox.
While these airbrakes have been designed to work in full and semi auto they may not be suitable for rates of fire above 20rps/1200rpm, in all gearboxes the removal of the second piston tooth and lowering of the third is highly recommended.
Technical Specifications
Material : Acetal piston head body, 2014 T6 Aircraft grade aluminium bushing
Weight : TBC
AOE Shims : None Included
These will not fit gearboxes with offset nozzles/cylinder heads.
The following gearboxes and AEGs are known as incompatible with the airbrake piston heads :-
- V6 Gearboxes (P90/Thomson series AEG)
- V7 Gearboxes (M14)
- V4 Gearboxes (UZI)
- Real Sword SVD
- Real Sword Type 97
- ARES/STAR L85
- ARES/STAR FNC
- ARES/STAR M14
- ARES/STAR M249/MK46
- ARES/STAR M60/MK43
- G&G L85
- G&G M14
- KSC Hk33
- Systema PTW series
- Systema Revolution gearboxes
