Recent content by Simon Thomas

How can you change formula 4 in Hooker's paper, and then "prove" he is wrong? You obviously don't understand the step Hooker made. There is no "2" in the denominator. If you were as bright as you attempt to portray, that should be obvious. You are still wrong. For those still bored enough to be...

Your delusions of understanding are thoroughly entertaining, however you are still profoundly wrong. I am not going to discuss all the inaccuracies in your posts because I don't want to get into endless discussions.

My books finally arrived! One of them is "Aircraft Propulsion Theory and Performance" by Morley. It expands on Hooker's work. Seems Dagger made a massive error in his assessment. In Morley's book, it provides a figure for the Universal Gas Constant G of 2,776 "ft.lb per °K". He also gives an...

Appears from the report copying the Mustang section for the root aerofoil was not a success. The Horten IX was developed into the Go 229.

In another thread, Calum stated he uses this service to get copies. The costs are on the page. https://www.arcre.com/copyservice

Does anyone have the flight test data for Hurricane II P3269 with Merlin XX C10225? The data was used by Hooker & Hawkers in Hooker's supercharger paper to generate the curves. The paper has a graph of the RR and Hawkers results - it would be interesting to compare to the actual flight test data.

I now see why the Piercy aerofoils were very popular in the late 1930's. The R.A.F. 30 was developed using Glauert's paper R&M 911. The attached paper has the parameters needed to generate the R.A.F. 30. I was able to drop it into a spreadsheet and followed the steps to calculate the required...

#36. The Centaurus was the first 2,000 hp engine, type tested in Oct 1938. The R-2800 first achieved 2,000 hp when type tested in Sept 1939. I am not 100% sure of the dates, but I know someone will correct me.

Would you agree that sinø = ø for small angles of ø?

I am not sure I would agree that Hooker's work was sloppy. The overall purpose of the text was to find a better way to determine power at altitude. Hawker's separately performed the same task. They both determined a technique that successfully measured power at altitude within the sort of...

Agreed. I blame Hooker, as most of those are what he used. I suspect the conversion factors are where the 77 comes from , but I hope someone else can work that out. I would like to, but all my books are still on their way from Canada to Australia. My wife is still miffed that I packed 34 boxes...

Looking at the units, the gas constant x the mol/lb of fuel has dimensions of m2/s2.K Putting eqn (4) into mathcad with the provided units, this shows that m2/s2.K are the dimensions required for the constant 77. [ignore the numerical results, I just wanted the units to drop out. 14.91 mol/lb...

Looking at the text, 0.422 = S = clearance volume.

Let's see if this works. A 3D photo depiction of the Hercules 216 at Queensland Air Museum. https://lumalabs.ai/capture/2CEA597C-FC8B-4253-85B1-609B130DDEF0 I have no idea how it works, my teen just waved his phone at it and this came out.

From Flight, November 26, 1936: "Under Potez licence, Lorraine build a 12-cylinder horizontally opposed air-cooled engine with an output of 475 h.p. at 2,500 r.p.m. at 9,840ft. Each cylinder is separate and has two pushrods on the underside. The exhaust ports are square and finned. The...