View Full Version : Typhoon & Tempest, Best of British.

03-22-2013, 07:10 PM
These big powerful [2000+ hp Napier Sabre H-24 mill] Hawker fighters were fast hard hitting machines -4 20mm Hispano cannon [+ rockets & bombs], & bested the Luftwaffe's hit & run low-level attacks on Britain by Fw 190 jabos & later the V1 cruise-missile offensive on London in `44.

Their power gave them the fastest, most potent offensive capability performance available to the Allies in the tactical air-superiority/strike role for the invasion of Europe like-wise..

05-06-2013, 10:23 PM
& the mighty Napier Sabre, also best of British..

Check out the 3,500hp [on +20lbs ADI boost] for take off - rated Mk 7..


05-15-2013, 05:38 AM
& A Sabre-Fury.. http://www.pbase.com/image/55757158/original.jpg

05-15-2013, 05:04 PM
Gotta love the madness inherent in coming up with the Sabre engine - one boxer engine isn't enough? Just chuck another one on top, it'll be fine. Oh, and while you're at it, come up with a whole different valve system to the rest of the world.
Never knew they did a Sabre Fury, but it does look awesome - I think I've got a new "aircraft I'd have built for me if I ever became king"...

05-15-2013, 07:00 PM
There's an old saying, 'bout the essential difference between insanity & genius being ..success.

The Sabre isn't a 'boxer' FYI, more like 4 Porsche flat 6 mills en-bloc,
& the valve system is more familiar if you've ever seen inside a 2-stroke chainsaw..

Kermit Weeks has a Tempest & a number of Sabres, with the intention of flying them,it'll be cool to see & hear a Sabre flying again..

05-16-2013, 02:49 AM
Oh, I'm familiar with how sleeve valves work and why they thought they had to do them - I'm just ever so slightly in awe of the fact that they got them to work!

05-16-2013, 03:12 AM
Why? Awed by how well they went? Or worked at all ?

Since in principle ..they are less 'nuts & bolts' than poppet valves..

This may be of interest.. http://www.hawkertempest.se/GreatestEngines.htm

05-16-2013, 03:55 PM
Bit of both. And I've seen a sectioned Centaurus engine which has the same valve arrangement - it's actually a hell of a lot more complex than a 2-stroke.

That website is a bit hagiographic about the Sabre - they're rather taciturn for instance as to precisely why Bristol made their sleeves for them (Napier couldn't make one that lasted any length of time). I do agree with most of it though.

05-16-2013, 07:19 PM
There is a hand-cranked Bristol sleeve valve display unit at the RNZAF Museum which shows just how simple & smooth they are in action..

Bristol had much more investment & production experience in manufacture of them, it is amazing that in wartime they had to be pushed to help..

& as noted R-R were actively hostile to Napier..

The 'complexity' is more conceptual than actual, & modern 2-stokes do indeed have various forms of regulating their similar large/efficient ports.

05-22-2013, 12:54 AM
Here's a set of performance figures for that Sabre-Fury..