How to make a propeller at home

Many technical devices invariably require a propeller or, as it is otherwise called, a propeller. There are various goals, and for each should choose a specific technology and strategy. If you are interested in how to make a weather vane with a propeller yourself, then this article is especially for you.

What material to choose

What the screw will be made of should be selected depending on its further purpose. For example, solid bars are ideally suited for the manufacture of screws designed for powerful engines (about 15-30 hp)

If you consider yourself an experienced craftsman, then a blank of air plywood with a large number of layers is suitable for you. But lovers should not start with it, because this instance is very fragile and can form bumps.

Instruction manual

So, how to make a do-it-yourself propeller? The process of creating a propeller looks like this:

1. First you need to deal with patterns, namely: 1 top pattern, 1 - side and 12 blade patterns in profile.
2. Fold off the screw blank in accordance with the dimensions on all four sides and draw the axis lines, the contours of the side view template.
3. Remove excess wood. First, do it with an hatchet, and then a plane and a rasp.
4. Now put the blade template on the workpiece and fasten it with a nail in the center of the sleeve for a while, then circle with a pencil.
5. Rotate the template 180 ° and circle the second blade. Excess wood can be removed with a fine-tooth saw. This work should be done carefully and not in a hurry.
6. Without haste, remove the wood, making small and short overhangs.
7. The screw must be brought to readiness with a planer and a rasp with a check in the slipway.
8. In order to make a slipway, you need to look for a board of the same length with a screw size, and also allowing you to make 2 cm transverse cuts with your thickness in order to set the templates. To make the central core of the slipway you will need a solid tree. And its diameter should be like the diameter of the hole in the hub of the screw. The rod should be glued to the surface of the slipway at an angle of 90 °.
9. Put on the screw and see how much wood needs to be cut so that the blades match the profile patterns.
10. As soon as the bottom surface of the screw starts to match the patterns, you can start fine-tuning the top surface. This operation is very important, since the quality of the resulting screw is based on it.

For beginners, there are often cases that the blades do not match in size. For example, one turned out thinner than the other. But in order to make the right propeller, you will have to achieve their equal size by reducing the thickness of the other blade. Otherwise, the screw will not have balance. Small oversights can be easily fixed. For example, stick small pieces of fiberglass or coat with small wood chips that are mixed with epoxy.

Screw balance

Already made screw must be balanced. That is, to ensure that the weight of the blades coincides. Otherwise, when the screw rotates, there will be shaking, entailing grave consequences - all the most important components of your device will be destroyed.

But in practice, there are frequent cases when skilled craftsmen who do not wonder how to make a propeller, the weight of the blades varies. And this is even subject to all the nuances in the manufacture! There are a lot of explanations for this: different specific gravity of various components of the bar from which the screw is made, different density of the layer and many other reasons.

But there is a way out of this situation. You need to adjust the propeller blades by weight. True, there is one "but."

Finally

So how to make the right propeller? In no case should you cut the wood with a heavier blade. Just the opposite - you need to weight the smaller blade by riveting lead.

So the answer to the question is how to make a propeller, if the screw does not move during balancing. We strongly recommend that you follow all personal safety precautions. A propeller is primarily an object that rotates quickly around its axis, which means that it can potentially be dangerous. If you are trying to figure out how to make a propeller, then follow the safety rules.