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WHAT IF I EXCEED THE MANIFOLD PRESSURE LIMIT?

Some time ago, our client contacted us, concerned that he had exceeded the manifold pressure limit.
He then explained that he had previously tried to keep a close eye on the gauge, but this time the situation required pulling the lever, which caused the limit to be exceeded.
What now??? Is an inspection needed??

No, there is no need to call a mechanic, but it is important to remember that there may be problems due to material fatigue.
This additional power is not available so that we can exceed the limits by taking full tanks of fuel and our heavy colleague, but only to save us in critical situations.

We have noticed that many novice R22 pilots try to keep a close eye on the manifold pressure gauge to the point that they could even crash due to not using the additional power, hoping to get out of trouble without exceeding the limits.
It is best to fly in such a way as not to create critical situations. However, if we find ourselves in such a situation, do not be afraid to exceed the limit! This additional power is there for it!

For example:
R22 Beta II = Lycoming O-360-J2A, carbureted, naturally aspirated engine that can produce 180 BHP at 2700 RPM
The power of this engine has been reduced by Lycoming to 145 BHP due to weight.
Lycoming installs lighter cylinders for the RHC to reduce the weight of the engine and this is why the power is reduced.
The RHC further reduces the power of these engines to 124 BHP and 131 BHP for 5 minutes at takeoff.

By reducing the power the engine does not work hard so Lycoming has extended the time between overhauls.
The engine is more reliable, gives better altitude capabilities and a power reserve if we need it.
Of course this reserve does not mean that we can burden the helicopter and exceed the weight limits..
The reserve is there to get us out of trouble if we get into trouble!

Posted in: Helimot

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