Talk:Weslake A80

Citations needed!
I can't yet provide a source for the speed of the centre shaft (compared to the crankshafts) but I'll keep looking. I've deleted the claim on weight saving, and have changed it to an economy issue which is, I hope, self explanatory without a citation. The lubrication (wet or dry sump) is a surmise from the engine drawings on the Weslake data sheet. It would be unusual (but not impossible) to have a spin-off filter with a dry sump, perhaps? I'll ask the company for clarification. Arrivisto (talk) 16:25, 4 September 2014 (UTC)


 * I removed that statement "the engine drawing seem to show..." as that falls under WP:OR. The rest of the facts still need citations! - Ahunt (talk) 17:04, 4 September 2014 (UTC)

Description
I wouldn't call this a flat-four engine. It's more like a horizontal version of the Junkers Jumo 205. Roberttherambler (talk) 00:27, 31 January 2017 (UTC)
 * The Diesel air press release states: "This first engine resembles a flat four or 'boxer' engine, but has only two cylinders, each with two pistons". Roberttherambler (talk) 00:43, 31 January 2017 (UTC)

Discontinued?
Front page of Weslake website: "Weslake is committed to designing and manufacturing a range of ultra lightweight fuel efficient heavy fuel, and petrol 4 stroke engines in the UK". This implies that the 2 stroke aircraft engine has been discontinued. Roberttherambler (talk) 00:48, 31 January 2017 (UTC)


 * It is a weird company website, as it doesn't seem to list any products! Is it the A80 engine? If it is then the news page might sort of imply it is available. - Ahunt (talk) 01:02, 31 January 2017 (UTC)


 * I see what you mean. I've enlarged the photo and it looks like a horizontal engine. Roberttherambler (talk) 01:22, 31 January 2017 (UTC)


 * Weslake A85 engine will be at AERO Friedrichshafen, 5-8 April 2017. Roberttherambler (talk) 01:33, 31 January 2017 (UTC)


 * These links might be useful:  Roberttherambler (talk) 01:57, 31 January 2017 (UTC)


 * One of the main troubles with this Wikipedia article is that we have no model number. Is this teh A80? A85 or some other earlier engine? - Ahunt (talk) 16:27, 31 January 2017 (UTC)

Displacement
I'm assuming 77 mm (7.7 cm) is the stroke of each crank, so the combined stroke is 15.4 cm. Cylinder diameter is 7.2 cm (radius 3.6 cm) and there are two cylinders. Calculation: 3.142 x 3.6 x 3.6 x 15.4 x 2 = 1254 cc. This is a bit less than the quoted displacement of 1332 cc. Roberttherambler (talk) 01:11, 31 January 2017 (UTC)