Andre wrote:Go around the airfield and say month what propeller on the Cessna or Piper cherokée Money, Asteck ect ..
the production figures of MaCCauley or Sensenich alone exceeded all the production of the other small craftsmen, manufacturer put together.
Obviously if we talk about Rotax or Jaribu they are all contraindicated with a light propeller.
I tried on a ULM belt driven Subaru ULM engine, a metal propeller of cessna 140 a 1,78 m in diameter the plane was more recognizable when the performances had increased
compared the small carbon.
The adjustable Warp drive carbon propellers do not last a long time on a Lycoming even on the smallest O-235 115hp.
Andre
But I never said the opposite: the propellers you mentioned are mounted on CERTIFIED and AMERICAN planes, apart from American planes there are few in Europe and very few in France (the Cessnas have long been manufactured under license in France (Reims Aviation) and sold in the rest of Europe, but Reims aviation no longer exists for a long time and Apex (Robin) is liquidated, as "big" light aircraft manufacturers, in France only Socata remains and its "TB", and this one survives only because it subcontracts fuselage parts for Airbus, makes military training planes (Epsylon) and business planes with propeller ... he NEW light aircraft is almost dead in Europe, the only ones who sell a little make very high-end ultra-efficient all-carbon machines ... On the other hand, ULM manufacturers are developing, especially in the countries of the former Soviet Union who have a lot of know-how and salaries that are 4x lower than in France ... urs the most common French 3-axis ULM, the Skyranger, is built in Ukraine by former Antonov employees.
As there are a lot of advanced propellers in Europe, we do not need to get supplies in the USA, even the propellers of the new A400M with 4 11000hp engines, are manufactured at RATIER in France (the Russians and the Ukrainians do 15000hp turboprop engines and counter rotating propellers with a performance as staggering as they are noisy (A tu95 flew over my home a few months ago, and although flying visibly at least 10000m, I could hear it very well ... but the consumption of a Tupolev tu95 is almost half that of a B52 with comparable performance and age) ...
Warp drive propellers have a bad reputation in France and do not sell much (a lot of trouble on ULMs (vibrations and blade breakage in flight), not used at all on planes in Europe): those who want quality carbon propellers and despite everything not too expensive, buy Ukrainian propellers and those who want the "top level" for powerful engines (up to 450hp Vedenyev radial), buy German "MT propeller" propellers (high-end variable pitch)
But it is certain that with a very large propeller which turns slowly, the efficiency will be excellent, the limit is often the ground clearance or the engine RPM ... the planes of the First World War had enormous "threshers" , but often very noisy because the speed of sound curled at the end of the blades, suddenly their performance was often very poor, moreover it was by manufacturing a very powerful propeller ("flash" propeller for the SPAD VII of 1917) that 'a certain Marcel Bloch (Marcel Dassault after 1945) began his career as an aircraft manufacturer ...
