Here in England, there's pretty much a speed limit of 4 mph on every lake or waterway.... You guys are so lucky and its great to see you making the best of it. Stay safe and go live that American dream.......👍
Oooooooooooooooooooooh yes, looks fast Jay. All the very best for the season looking forward to seeing the races. Think putting up with the cold and snow are worth it to live around such lovely places.
Ben Lloyd Compared to a piston boat, you can barely hear it coming. All the race boats leave a wake about two inches high, and they are gone in a flash. Also, when out practicing, the race drivers give right of way, and a large margin to anyone who's out enjoying their boat. Guys like you get a lot of respect. Usually boaters wave at us.
So much power from such a cute little engine! Love the sounds too! Thanks for a river racer update; and thank Gord & Bobby for letting you share it. DD
It Definitely looks faster!!! Been a loyal follower for a while...Love these boats and the Engines. Also looks very beautiful up there. Much different than Dry California right now. Keep up the hard work, i look forward to seeing how they do this summer.
I know it was a July take. But I'm glade you show me a aircraft chip.It is good the captain use a horizontal stabilizer to even it's load variable. That was the cause of many accidents. The get away boat feeling is no joke. Control is everything, even if your inches off the water.
Its like it flies across the water rather than in the water. obviously the inlet for the water jet is in the water but it looks like only a few inches of the hull actually come into contact with the water at top speed. awesome boat
I bet you can hear that boat from 2 miles away, amazing sound. Gives me the chills. Did you ever tried to go on sea with this boat or is it build just for lakes? Would the salt water effect the boat in any way?
Great clip thanks for posting. I just love power turbine driven equipment. The boat looks like it produces very little wake at speed, that has to be good for efficiency.
When the T58 was in helicopter service, was there any sort of sound deadening scheme being used that isn't present on the boat, or were the helicopters really that loud?
+Little Star (Zvyozdochka) Yes. These are not piston engines.The cooling period before shutdown is more important than warming up after starting for turbine engines.
+bmann1132 That is how we talk, but we throw a few extra "eh"s in when we know Americans are listening. We know they like to make fun of us, and we let them, 'cause they need cheering up these days, eh?
I had a few canadian friends in the telecom industry and I would overuse the word "eh" when they were around. Well it stuck and now I find myself using it constantly w/o thinking. serves me right eh?
Love the Canadian Spring/ Summer we get the jet boat videos👍 Jay could you run a Lycomming t55 in these boats or are there constraints? The off shore boat runs twin Lycommings or is it a jet boat rule to stay with the T 58s Cheers mate
grant weymouth The rules are open to anything, but the boats need to be small enough to navigate the sometimes tight race courses made on the smaller rivers. The T-58 requires a hull 2ft longer than the piston boats use, and that has a noticeable effect on turning and handling.
mikeallenbrown1 The canards are for stability and control of the the boats plane/ride on the water and is angle adjustable "in flight" so to speak. One of Jay's earlier video's explained them if memory serves me right.
mytmousemalibu Is there any gyro control function on them aswell? I'm thinking in case of a sudden strong gust of wind that might flip the boat over, or just to stabilize the boat after hitting a wave.
preben birkeland I believe they are manually controlled by the pilot of the boat. As for a blowover, I don't think they are intended to stop one, if the boat is going over, the canards aren't going to stop it. The bottom of the hull has way more area for air to blow against, and if the bow gets that high, the crew is in for a rough ride.
Alan Caraway the 'jet' in 'jet boat' refers to the jet of water that propels the boat. You can have a jet boat with a piston engine for a power plant, or you can use a gas turbine, like this boat does. In aircraft, the 'jet' refers to thrust from shooting air out a jet nozzle at high velocity. These boats have no jet thrust from the exhaust, all the power is tapped by a turbine to run an impeller to squirt water.
CacheRAM I can understand the confusion. I am aware of the mechanics of final drive propulsion, and also aware of piston engine implementation vs "jet" engine utilization. I guess my initial comment of the marriage of a "jet" final drive and a T-58 turboshaft from an aircraft was offensive to chocolate, peanut butter, and piston engine lovers. My sincere apologies!
CacheRAM I'm voting a big ol' yeah to Mr. Caraway... As for the Cache, rammed or not... it's full of stuff everybody already knows, so thanks, but really not necessary. We are all Jet People here. I happen to be looking at a copy of Mr. Caraway's papers right here....
Alan Caraway No apology needed, I didn't know you knew, y'know. I was ignorant of the difference until I saw last year's race boat videos. Have a great day o/
She was running damn good. I noticed 95% of the hull out of water, she was up on the thrust in a good way. 110 mph maybe and please don't spaz out anyone, this is a positive comment.
Electric starter for the T-58. It is in the nosecone, and the electric wiring to the starter is what you saw. It takes a lot of power to crank it up to starting speed. In fact, a false start results in going for a coffee (if possible) to allow the starter motor to cool down.
Jay, I realise that the exhaust gases provide no additional thrust, but I'm wondering why they are directed upward and back instead of just back? Is it as simple as preventing the wash from hitting other boats to the rear, or am I overthinking it? Thanks for another great vid.
lazaglider Yes, you are over thinking it. The design is an over 50 year old helicopter engine and that's how they were built. In most turbine powered helicopters the engine is in front of the main rotor shaft, so the exhausts can't just go straight back. In helis the outlet to the side and back and not upward and back.
lazaglider actually, the simple answer is that it's the easiest thing to make. The PT case has a round flange that is offset from the center axis by about 45 degrees. The actual exhaust pipe or duct is not part of the engine, and is made for the boat application. You can see that it is a simple, straight tube. Least expensive way to do it, and with that slash cut end, it looks way cool.
AgentJayZ Thanks so much. If that was not the case, and a straight pipe was the easiest, would there be a realistic issue with hot gases affecting other boats in close proximity enough that an upturned pipe would be justified? I know we are talking about a BS situation, just wondering.
AgentJayZ Incidentally, I've just got back from a historic race track very local to me, and they had a car running on, from what I can gather, a similar engine to those shown here. Helicopter application, anyway. Drive derived from PT/gearing. Interesting thing. Loud, rather than fast.
Charles Bass The accessory gearbox brace is proprietary secret info. The alternator drive mount was made of 3/8" thick aluminum. It kept breaking, so now it's 1/2" thick SS... prob eight times stronger, eh?
@3:17 I noticed that the air intake is split and faces back towards the rear of the boat, wouldn't that have a negative impact on its performance? Most jet engines I've seen have the air intake facing forward in the direction of travel, i tried googling this but I wasn't able to find much info on this topic. Thank you for all the awesome content, hope you're doing ok :) (Please ignore this question If you have already answered it in a previous video)
These boats use helicopter engines, and they travel up to 150 Mph. The "non straight-in" inlets are designed to reduce entry of fod into the engine. The ram effect of jet aircraft inlets only just starts to begin at speeds around 150 Mph. A healthy splash of water going into the inlet could cause damage, so the inlets are designed around preventing that.
You should have a look at the designs of the early jet engines from the 1940s, which used single stage centrifugal compressors. Some models used double sided compressors - essentially one centrifugal disk backed onto another like a mirror-image, to get twice the volume of air through a single rotating compressor disk. In order to get air into the backwards-facing side of the compressor, this design had half of the air intake also facing backwards. It may seem as if this shouldn't work too well, and it's probably true that the forwards-facing side of the compressor effectively got more air through it when the aircraft powering the engine was travelling at high speed. But since both sides of the compressor fed into the same discharge tubes and hence into the same combustors, this probably didn't matter too much. Besides which, those early engines certainly worked well enough, despite being somewhat inefficient by modern standards.
@@lloydevans2900 My dad's jet boat uses a conventional motor (327 out of a 60's Corvette) and dad would actually turn the intake backwards because it worked "too well", sometimes. In other words, your explanation made sense to me because somehow air makes it into an engine without having to direct it as much as a person might think.
@@matthewmosier8439 Back on solid ground, some cars have ram air intake scoops too, though I have always wondered how effective these could possibly be for most speeds - they seem to be mostly for show (because they look good), more than anything else, though they do probably add a bit to the forced induction down a straight when you can get up to 100 mph or more. My only real experience of this was from seeing vintage 3-wheeler Morgans racing around some of the legacy racing tracks in the UK. Like the modern incarnation, these all use chunky air-cooled V-twin engines, slung out right at the front of the car, with the only item further forward than then engine being the number plate. In factory spec, these had a single carburettor mounted between the V, with a T-shaped intake duct feeding the intakes on each cylinder, and the air intake facing backwards. In racing spec, this is usually upgraded to a pair of independent carburettors, each feeding its own cylinder. The geometry of how these are fitted usually meant that one of the air intakes faced forwards and the other faced backwards. This doesn't make any real difference at most speeds, but when you watch these machines racing, going down the finishing straight, you can sometimes see one of the exhausts producing a bit more smoke than the other - each cylinder has its own exhaust pipe, running from the engine down the side of the car. This indicates that one of the cylinders is burning cleaner than the other, likely a result of the forward-facing carburettor getting slightly more airflow from the little bit of ram intake effect. So it can make a difference, though you have to be going at a decent speed to notice. It certainly makes a difference for piston-engine powered aircraft, which usually have the air intakes mounted just behind the propeller, so the prop wash itself provides a bit of boost to the forced induction.
Mark Potts Right now they are controlled by pushbuttons on the steering wheel by the driver. As the speeds get over 150 mph, I think a more aviation derived system as you describe will be needed.
Dang..............that was a long ways to be backing down that launch. I'm a big rig mech and could do that all day long with a 53 trailer, but those short boat/bike trailers always get away from me lol
SuperSecretSquirell This is easier than you think. I did this in NZ for the 2013 Worlds... right where they filmed the Hobbit. I mighta run over one or two... Bobby is doing the driving, and he is a pro.. literally. He spent his youth as a class 1 driver in the oilpatch. Nuthin he can't do.
I know it's not "hard' per se, just that I find it way easier to back 48 and 53 foot trailers into something tighter than that then it would be to back a boat in..............for me anyway.
SuperSecretSquirell Here's a super secret: the first time I ever launched a boat into a river was during a race for the 2013 world championship. If I can do that, I'm certain you could with ease. You need to remember that the guys driving these boats are the best of the best. Follow their signals, and you can't go wrong.
Uh yeah boss we had to keep going that fast after we got underway and realized that the plug for the bottom of the boat was still hangin on the key ring.... it's only the pilots first day, can't expect him to think of everything...
Obviously the sound will be a bit different in person than through video but that sounds exactly like some of the big commercial jets that fly past my house every so often. Didn't know those helicopter turbines were so similar. (Living right in front of an airport runway makes for some enjoyable noises :) )
TheRealSiman About the only (major) difference aside from the power turbine (vs. jet nozzle) on many helicopter engines (I'm not 100% sure about the T-58, maybe AJZ will decide to chip in) are more robust dust- and FOD-prevention systems, since helicopters spend a lot more time near the ground than most other aircraft. They're obviously smaller than most aircraft engines too, and as such some of the smaller ones (RR Allison 250 comes to mind) use a mix of radial and axial compressors, although the T-58, being fairly large for a helicopter engine, does have an all axial compressor.
Ryan Willis I don't know that the engines are all that more robust. Engine principals are the same and a blade airfoil has be just as strong & efficient of design and shape as other gas turbines. Helicopter turboshaft engines may or may not have added FOD screens/sand filters/etc. The PT6A's on a King Air have a feature in the inlet called an inertial separator or ice door, also used on many other turboprops. This device redirects the inlet airflow in such a way that due to the abrupt change in airflow direction, heavier than air particles like dirt and ice get ejected from the flow path via their own mass and out the bottom of the cowling while the engine gets clean air. If the dirt or dust is fine enough to make it into the engine, it shouldn't be of harm. Our PT6 powered planes get a compressor wash at annual inspection time to clean out accumulated dirt. Compressor washed are a pretty normal thing. Not so long ago on older engines without the cooling air passages in the blading and nozzles, they were treated with being fed essentially ground walnut shell into the inlet while running as a soft abrasive to clean the compressor section up mostly.
Looking at the gauges, I see Oil pressure for both spools, and turbine temperature - after the flame cans? Then another gauge (another temp?) and three digital gauges, which will be RPM of each spool, and .... ?
J, so what PT engine would work well in my 12ft alum fishing boat? Have 5.5 and 9.5 Johnsons now. I'm tired of getting passed by 300 Mercs on the way back to the ramp. maybe a 250 Allison? Haha. But seriously now do you run BP 2380 oil in all your jet engines? It looks like GH is sponsored by Shell so maybe runs Shell jet oil? How do you like MobilJet 2? Bob.
Surprisingly.. the T58 is not that loud. When I started my ch-3e we would start both engines...then all the extra noise from the main gear box, assesory gear box, Rotor blade tail made it a very noisy aircraft.
Jay has his super happy face on..... I wonder, how much of the boat's hull is actually in the water, compared to just skimming over it? not much I suppose.
Listen I understand all your enthusiasm believe me I know how addictive it gets . I would like to ask one more thing if you can . Can you go into your propulsion pump just a little so we can see . This whole projects impressive
Why is the starting sequence the way it is? To me, the intuitive sequence would be running the engine up to speed, followed by fuel and igniters simultaneously. That appears to be the opposite of what I've seen in your videos
Michael Bricker Well, you have not been paying attention. Ignitors are always energized first. That way, no amount of fuel can build up and cause an explosion. Simultaneously would work, but that requires a great deal of coordination and control, if you think about it. The sequence must be 100% reliable, with zero chance of a screwup, so ignitors first, fuel second is just the way to make absolutely sure you don't blow up your engine.
AgentJayZ thank you, but I understand that part. The part that gets me is why the igniters spark before the starter begins to spool up the engine The igniters have a limited lifespan, so it seems like that would be putting them through unnecessary cycles
My goodness.. 1st of all > nice backing of the trailer :-) Any faster and you would have to ask for takeoff clearance..(Not that you would want that) Great vid >>> Cheers
Bergstaller01 130 is fast for a boat, but not for an aircraft. There would be a barely significant ram air effect, but then, it's a helicopter engine. It's not designed to exploit ram air. That's for planes that go hundreds of knots. What the car people and the bike people call ram air is more hype than anything else. Jeez, now I'm waiting for a wave of puffed-up piston people telling me off.
***** You know, I never did see Smokey and the Bandit, so I just watched a couple of clips of the car chases. That movie must have been great in it's day, but now I'm embarrassed to live on the same planet with the people who made it.
SirDeanosity I like the way a fast boat running well and driven by a true race driver... sounds like a missile as it goes by. ( I actually don't know what a missile sounds like... but you get the idea...)
MrTommymxr No prop. Jet pump. Driven mechanically, by the output shaft of the engine reduction gearbox, which is driven by the power turbine. The T58 playlist explains it all...
Hi, I would like to ask your permission to use a few clips of your awesome video for a future video compilation, I can credit your channel and link to the original video, thanks.
