Any guess is pure speculation.
The James May Edition Spitfire is, yes
The first Spitfire prototype was flown on March 5, 1936.The first combat ready Spitfire flew on May 15, 1938.
The Supermarine Spitfire flew many sorties, however it was mostly renowned for its effectiveness in "the Battle of Britain" 7 September 1940 to 11 May 1941.
Unless the Eisenhower dollar came from a special mint set, it is only worth $1. If you have an "S" mint mark though, it may have come from a mint set and worth significantly more.
It depends on the medium that the propeller is in . Aircraft propellors are very fast ; several hundred revolutions per minute. Ship's propellors are much slower ; up to one hundred revolutions per minute.
Propellers need to have very precise shapes, and be kept very smooth, for proper operations, therefore, a corrosion resistant material must be used, regular steel will not do. Brass is a cost effective alternative. More expensive materials may be used if the situation warrants it, for example, stainless steel is used for propellers in very cold waters, where the brass would be rendered brittle.
The Titanic had 3 propellers. She had 2 wing or outer propellers each with 3 blades and 23 feet in diameter, and 1 center propeller with 4 blades and 17 feet in diameter. All propellers were made of Bronze.
In May/June 1938, the RAF's 19 Squadron got the first Spitfires in service
Your answer depends on the value of the individual diamonds set in the metal of the jewelery. A local jeweler may be able to give you an estimate of its worth.
The value of a set of Johnson Brothers Arundale china can vary depending on factors such as the condition, rarity, and demand for the pattern. To determine the specific worth of your set, you may consider consulting with a reputable antique dealer or appraiser who can provide a more accurate assessment.
The value of a 1994 coin set depends on factors such as the condition of the coins, the mint where they were produced, and any special characteristics or errors. Generally, a standard uncirculated 1994 coin set could be worth its face value or a slight premium, while sets with rare or unique coins may be worth more to collectors. It's recommended to have a numismatic expert or appraiser assess the set for an accurate value.
Propellers generate thrust by converting rotational energy into forward motion, which helps lift the airplane. As the propeller spins, it creates a pressure difference between the upper and lower surfaces of the wings, contributing to lift. If the thrust generated by the propellers is sufficient to overcome gravity, the airplane can climb to a higher altitude. Conversely, if thrust decreases or drag increases significantly, the airplane may struggle to maintain or gain altitude.