Recent content by Simon Thomas

Most aero engines have mixture adjustment to accommodate changes in mixture required due to change in altitude. The main issue is that engines require a range of ratios of mass of fuel to mass of air. Carb venturis work by feeding fuel into the air stream based on density and velocity. With...

The F-4 version of the P-38 in RAAF service was abysmal. They had to use Wirraways, as the P-38 were so unreliable. https://www.adastron.com/lockheed/lightning/1pru.htm

The last 3 pages of the MI flyers last article: Edit: Some muppet (me) mis-attributed the preceding part of the article. Thanks for the correction MITasol.

From the Australian NAA. Title: DTS [Directorate Technical Services] - Mosquito aircraft - De Havilland representatives reports Contents range 1944 - 1947 Series number A705 Control symbol 9/52/102 Access status Open Item ID164648 Page 66-67

I found this when wobbling through the Australian archives. Aerofoil Section The aerofoil shall be of the Piercy type with maximum thickness at 35% chord and a mean camber line of a modified RAF.34 form having maximum camber of 1.75% chord. A possible interpretation is that it is a RAF30...

The Hurricane I with the fixed pitch prop used full throttle for takeoff. The reduced RPM was due to the coarse pitch and slow speed not allowing the engine to reach max RPM.

I liked this drawing.

Attached is R&M 2600, which is the index for 1909 to 1947. It indicates R&Ms 2126-2150 are in technical reports 56, 58, 61, 63, 64, 65, 66, 67, 68 and 74. R&M 2150 is an index report of the previous 100 reports. Links to these reports: 56 : Technical report 56 1939. 58 : Technical report...

In the Aeronautical Research Council Reports & Memorandum Report No. 2756 "The Loss in Climb Performance, Relative to the Optimum, Arising from the use of a Practical Climb Technique" bу K. J. Lush dated August, 1949, there is a table in Appendix II that contains CDZ and πeA values for the...

"the Mark V which was introduced in Autumn 1944 with an output of 2600 h.p. at 2500 ft. and 2,300 h.p. at 12,750 ft. and a boost pressure of +15 lbs./sq.in." Quote from the information in this post: https://ww2aircraft.net/forum/threads/napier-sabre-ww2-overview.62812/

From Lumsden. These were the engines in the Tempest Vs and Spitfire XIVs chasing the V-1's in mid 44.

In the IMechE Napier Sabre archive, item NAP/6/2/7 makes this statement: "Report concerning single-seat fighter aircraft Sabre E122 aftercooled engine. Includes comments on layout, drawings and test data." Someone is adament that the E122 was never made. One of the Napier Heritage Trust books...

The 213J curve Calum located is in this post: https://ww2aircraft.net/forum/threads/jumo-213-vs-napier-sabre.59951/post-1839364

Eng wins the internet today: Its weight with intercooler was 2,325lb (1,055kg) and the power output was 2,350hp for take-off at 3,700rpm. From "The Race for Hitlers X-Planes Britains 1945 Mission to Capture Secret Luftwaffe Technology" by John Christopher.

It might have been removed since I looked through there a few years ago. I found report 13 (1918) to report 84 (1951). Roughly R&M 360 to R&M 3127. PM me if you need any between those. Edit: Found the report I was missing.