Here is a centralized location to learn all about the causes and cures of our sport’s most likely serious injuries: body contact with spinning prop. It is broken down into several sections to ease the search.
There are a number of hardware improvements that would increase prop safety. Namely, the cage should be able to prevent an open human hand from reaching the prop at full rated thrust from anywhere on the cage, including netting and the cage system should fully enclose the prop. The easiest improvement that can be added to most machines is the safety ring. Here are some other resources.
A Better Paramotor. This page lists a whole bunch of ideas to improve the safety of paramotors besides prop safety.
SafeStart Under development.
A Better Throttle almost as good as SafeStart but much simpler.
Safety Cage Retrofit. Here you’ll find details on adding a safety ring to existing machines.
Rope Trick 2 (Prop Stopper). Simple method for pilots of clutch-equipped machines to prevent their prop from turning during start.
Safer Starting Stand. This is a great way to reduce risk either out on the field or at home in the shop without having to do any modifications to your paramotor.
Cage & Prop Intelligence. Here are a variety of ways to reduce risk, including the SafeStart electronic engine shutoff device. Among other ideas, this page has an animation detailing how SafeStart would work.
Shutoff Technologies has some other ideas, besides SafeStart, for shutting off a thrusting motor during start.
Another element is that the prop should be fully enclosed by the cage. Doing so reduces the chance for a reach-around injury. Just because it’s difficult to do that while hanging in a simulator doesn’t mean its impossible during launch when things are bouncing around or during a fall.
Here we show the various ways that pilots have gotten whacked by a prop and suggestions to reduce the risk. It is organized by phase of flight. Although most accidents happen while starting before flight, they happen elsewhere as well.
Example Accidents & Injury Types
Go to the USPPA incidents page for a full list but these are some examples of those that reflect the variety of ways props and people don’t mix well.