Mixture leaning
As an ex Enstrom sales whizz kid (before Robinson took over) I always took great pains with my new owners to explain the correct leaning procedure for the Enstrom Turbo charged models, but as Nick Lappos says, it is essential to have at least an Alcor EGT, or preferably the more sophisticated indicator for each cylinder.
The FM advises that at MAP up to 29 hg, (some say 28 hg) a figure of 1550 degrees will provide the highest BHP (205) and for absolute ecomomy 1650 can be used. If 29 hg is set straight & level the ASI on the 280C model will usually indicate 100 mph and around 120 lbs per hour fuel flow. ERPM should be set at 2825.
If the mixture is leaned to 1550 degrees, the rpm will move up around 50 to 75rpm, the ASI will show an increase (usually 5 mph) and the fuel flow will drop to 95 lbs per hour. Further leaning to 1650 will reduce fuel flow to 83 lbs per hour. So more performance and greater range on a lower fuel burn and at £5 a gallon, there's a good fuel cost saving to be made.
PS ... Don't forget to return to rich mixture for landing!
Hope this helps some Enstrom owners, but note the above does not apply to the turbo 'A' models.
Dennis Kenyon.
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