![]() ![]() This isn’t as effective or efficient as simply reversing the direction of rotation on a normal propeller, and the results can be sluggish and difficult to control. Jet boats aren’t too hot when travelling in reverse either given the jet can only be directed aft, you’re reliant on the redirection of thrust as a result of lowering the deflector plate over the jet exhaust. Thus, lower speed = poorer directional control. The reason for this is that the effectiveness of the directional control of the ‘jet’ (the flow of water expelled by the jet that provides thrust) is more or less proportional to the speed. Whilst jet drives operate well at speed, when it comes to travelling slowly they aren’t great at all. Just be sure to hold on tight if you ever do this! Why so? Well by slamming the deflector plate over the jet stream and immediately reversing the flow of water you get a much more immediate effect than having to wait for a prop to get up to speed in reverse. In addition if you ever need to stop quickly, then in theory a jet drive is the best means to do so. As mentioned above, they’re great in shallow waters, but inboard jets can also be backed up on to beaches given the absence of any protruding parts including rudders.Īt very high speeds jet drives have been documented as being more efficient than props, and they’re certainly quicker to accelerate. Jet drives offer a lot of practical advantages over propeller driven stern drives or outboard motors, mostly related to the fact that they are safer in conditions where impacts with foreign objects are likely. As such jet drives are perfect for flat bottomed vessels (Jon Boats) used in shallow, rocky rivers, or in applications where personal safety around the prop would be an issue, such as when water skiers climb in and out of the stern of the boat. ![]() The impeller of a jet is generally a smaller item than a prop designed for a boat of the same size, and being fully encased, it is well protected from its environment. Well in simple terms jet drives are great, but only in very specific circumstances, much like airboats. I have put 80hrs on this motor pump combo this summer and have not ever been disappointed or let down yet!” Kyle Johnstun 852X / 6.Off the top of my head there are 3 ways of propelling a boat, either through the use of a conventional propeller, an impeller (or ‘jet drive’), and aircraft style propellers typically found on flat bottomed air boats used in marshlands where below waterline propulsion is impractical.įor most of us the choice will come down to propellers or jet drives, with props generally ruling the waves in most harbours.īut why is this the case? Why don’t jet drives enjoy the same level of popularity? I can slow to a crawl mid rapid and go WOT to blast in-between wave trains to make a smooth run-up with a blip of the throttle with no-slip whatsoever this 852x pump never stops pushing me up the river. I have a lot more confidence in big water now. In the rapids of Hells Canyon/Snake/Salmon river I am in love with this boat all over again. The adjustable trim nozzle took care of all my balance and porpoise problems. #Inboard jet drive fullI can haul a full load of people and gear now and I hardly even notice the extra weight. First trip out with the family fully loaded boat (coolers, food, fuel, 2 kids, a dog, etc) I was equally impressed fast, nimble and beinng loaded up didn't change a thing. “First impressions were "wow this thing is quick!" My boat would instantly get on step and topped out at 52mph with the 111mm nozzle insert. ![]() “Every time I run this setup I know it will take me anywhere I want to go with ease” ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |