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Old 04-13-2013, 10:11 PM
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PaulD
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Default RE: Wren Turbo prop

For the size of airframe u are looking at, suspect you will want more power. Also to consider is these engines do not 3D well. They don't have the throttle response you need to keep things balanced in the hover.

PaulD

ORIGINAL: Justflying1

Hello everyone,
Thank you for the information so far.
The Wren 54 turbo prop is no longer in production. This will rule it out.
I have however got some information from the Wren web site and manual.
I guess my main worry will be vertical performance.
Being an aerobatic plane this is very important to me and I do like my 3D flying, so being able to sit it on its tail is necessary.

Max Power Output : 7.5HP / 5.6Kw @ 195,000 rpm
Weight : 1750gms / 3Lbs 13oz
Overall size centre section : 326mm x 86mm / 12.8'' x 3.4''
Mounting : Hole dia 85mm / 3.4'', 6 x M3 screws
Ancillaries weight (inc battery) : 340g / 12oz
Propeller rpm range : 1100 to 9000 rpm
Propeller size range : 17 x 12 ~ 28 x 10 (2 or 3 blade)
Recommended Setup : 6400 rpm on Metz 22x13 3-blade prop
Fuel Consumption @ max power : 176ml per minute / 5.8oz per minute

The Wren 44 TurboProp is the worlds smallest commercial 2-shaft turbo-prop engine. It is
designed for use in miniature aircraft applications in place of an I/C engine. It is generally suited
to aircraft up to 25kg (55lb) in all up weight and will replace I/C engines of around 80cc (4.8cu