The one that came with it. If you're buying a used ultralight with no propeller and the manufacturer is still in business, contact them for a replacement. If they're out of business, do a web search for ultralight aircraft forums, join one and ask the membership what to get.
A small light propellor
propeller
The worlds lightest airplane is I believe the ultralight. Now ultralight aircrafts come in many different shapes and sizes but they are the "Family" of the lightest planes. To see what they look like, go to google.com and type in pictures of ultralight planes.
The 757 is a jet airplane. It does not have propellors.
It depends on the type and weight of aircraft, power of engine and type of propeller.
no a helicopter is not a airplane because helicopter lifts but a plane takes off and a helicopters propeller is huger than a planes
If one is interested in purchasing a toy airplane with an operational propeller they may want to check Amazon or eBay to make this purchase. Each of these sites have this type of item for sale to the consumer.
An ultralight helicopter is a considered to be a toy and it a common collectorÍs item. There is no need for a license to fly or play with this type of helicopter.
If "ultralight" is used as an adjective, it means either that the object described weighs very little or that it is a very light shade or color. If "ultralight" is used as a noun, it refers to a very light-weight type of aircraft. Usually these craft resemble large powered hang-gliders.
A uni-rotating propeller is one that can go around in both directions. This type of propeller typically will do different things depending on which direction it is going.
Which type of airplane?
Inclined plane
1.) Open Type 2.) Enclosed Type