Midland Air Museum

[Hagar]

Oh yeah and do you happen to know what engine powers the gannet? the intake on the front seems remeniscent of the intakes on shackleton griffon's

The Gannet is a turboprop powered by the Armstrong Siddeley "Double Mamba" gas turbine. Basically 2 single Mambas joined together. Each engine drove one prop & the Gannet could cruise on one engine. I believe it was also geared to drive both props if one engine failed. They have one of each on display in the museum. I was surprised how small they are. Pity I didn't take shots.

Here's a photo of the single Mamba. http://www.dundee.ac.uk/museum/MECHENG/3005.htm

[Hagar]

You're welcome. This should give you a better idea of the layout. The original ASMD.1 Double Mamba as fitted to the Gannet A.S.1, the first production model.



I found this article interesting. http://www.thunder-and-lightnings.co.uk/gannet/history.html

[Felix/FFDS]

Phew you would not tell that was a prop engine. Thanks for the info

The main difference between a turboprop engine and a jet engine is what you hang in front (or behind) .... If you hang a prop, it's a turboprop, if not, it's a jet.

If you have a prop with, say 48 blades, enclosed in a shroud, it's  a high by-pass turbofan (okay so it's a simplistic description, but, it still fits).

[Hagar]

[quote]If you have a prop with, say 48 blades, enclosed in a shroud, it's

[Felix/FFDS]

What do you make of this then? Is it a jet or is it a prop?

The Dowty-Rotol Islander G-FANS. Developed by Miles (R & D) & Dowty-Rotol the fans were powered by 2 standard piston engines. First flown by Sqn Leader Neville Duke from Shoreham on 10th June 1977. According to my father-in-law who worked on the project they had many vibration problems with the close-cowled fans & it was not a success. The idea was later used on the Airship Industries blimps.

That is, of course, a proper piston engined experiment.

[Hagar]

That is, of course, a proper piston engined experiment.

I understand it was termed a "ducted propulsor". You live & learn.
http://www.gloster.pwp.blueyonder.co.uk/archive/fans.htm

[chomp_rock]

Too bad about the rain, the pics turned out nice though. And speaking of Gannets and Shackletons are there any of either avialable for FS?

[Rifleman]

[quote]
What do you make of this then? Is it a jet or is it a prop?



I see this as no different from the ducted fans which many modelers use to power their model "jets" .........its still a much cheaper alternative to the pure " Turbine " which has come on scene in the past 10 yrs now.......