My FIRST TIME flying a JET | LS4 Jet M&D Flugzeugbau 

The engine looks like those on RC

Sonex make a kitplane that's powered by a dorsally mounted jet engine like this but it's $100k or so.

It’s not really common in hobbies unless you got money to burn

Okay

Dude where have you been? They been doing this for years.

So true!

@@redneckshaman3099 🤨📸

@@coolcatcher126 once you go black, it's like smoking crack ❤️

this is pretty trick 👌👌

@@SteFly ⚠️ God has said in the Quran: 🔵 { O mankind, worship your Lord, who created you and those before you, that you may become righteous - ( 2:21 ) 🔴 [He] who made for you the earth a bed [spread out] and the sky a ceiling and sent down from the sky, rain and brought forth thereby fruits as provision for you. So do not attribute to Allah equals while you know [that there is nothing similar to Him]. ( 2:22 ) 🔵 And if you are in doubt about what We have sent down upon Our Servant [Muhammad], then produce a surah the like thereof and call upon your witnesses other than Allah, if you should be truthful. ( 2:23 ) 🔴 But if you do not - and you will never be able to - then fear the Fire, whose fuel is men and stones, prepared for the disbelievers.( 2:24 ) 🔵 And give good tidings to those who believe and do righteous deeds that they will have gardens [in Paradise] beneath which rivers flow. Whenever they are provided with a provision of fruit therefrom, they will say, "This is what we were provided with before." And it is given to them in likeness. And they will have therein purified spouses, and they will abide therein eternally. ( 2:25 ) ⚠️ Quran

problem is weight mate, this had 19l of fuel, and im guessing youd get what 10 mins out of that if that, two even light jets youd need double the fuel.

yooo same here a dude i used to ride with on the canyons got his pilots license and i keep seeing the snaps of him flying like wow i'm over this bike LOL

Flying is great man, definitely get into it. I traded my bike and coke addiction for flying. I’m a commercial pilot now but I still got the coke habit lol.

@@ColAlbSmi please open your big book to p.522 xD

The closest to a flying bike would be hang gliding. I was addicted to cycling for 5y before I started HG and never looked back!

It's not super difficult to insulate against some heat, but probably best to leave it extended to cool down first

From what I read the unit won't allow retraction until the EGT reads 50C.

You would leave it out for a few minutes to cool down before retracting it.

@@jamesogle99 Huh so that's why it's not manually extended. Would've been a total no-brainer but that can result in an unwary pilot setting his glider on fire.

I talked to someone from M&D at their booth in Freudenstadt last year and apparently the thermal mass of the turbine is low enough to cool down within less than a minute. Drag is about the same as leaving your gear down

I like the idea of twin engines, angled so they don't roast the tail section. Be ALLL the power that glider would ever need.

Thank you!!

Thank you so much!

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@@SteFly i curse myself. Many people made own helicopter and planes here but government arrested them and put them in jail for innovation. Also confiscated their flying vehicles too😭😭😭

@@Kite-xp2lz thats a good thing. Imagine selfmade planes on the sky ☠️

“ an” out landing.

You still need towing plane to take off. Sad.

@@user-sv3ug5js5s You can be winch launched, it just depends on the airfield you launch from.

same!

It will be a problem over time. It would of been better if they used 2 jet engines 🛩️

Yes seems like it will cause stress cracks over time.

@@Funk_Reactions Something to keep in mind: as the aircraft is traveling forward the EGT (Exhause has temperature) mixes with outside air and the temperature lowers as the air molecules mix. By the time the exhaust and outside air reach the tail section its probably not much warmer than a medium hair dryer or lower. I would agree if you tried to use the jet engine for take off, yes, you'd literally burn the tail off the glider.

The tail must have to made out out aluminum somehow to resist the heat, I think. Once the plane is flying through the sky, it will be sufficiently cooled by the passing airflow.

Fibreglass too, aren't they? Fibreglass fires on water are a nightmare. Can't imagine one at 10k ft with control cables running through there. Give me a parachute.

​@captainotto my club doesn't allow anyone to step into a glider without a chute

@@znek4288I could imagine, I wouldn’t want someone dying on my watch neither. Insurance would be screwing your hard if that happened lol gotta have your ass covered lol

Yes, I wondered about poss heat damage from exhaust. Also, I'd imagine the engine must cool before it is stowed to avoid internal fire.

@@bartofilms Those engines do need to cool before stowage. In fact, you can't even shut them off without keeping airflow over them or their bearings will fail by heatsoak much like your typical automotive turbocharger would.

That's not cool, that is stupid.

​@@fredf3917Just like you

LBA is watching 🤣

@@SteFly that's what I suspected 😆

Afterburner..? 😆 🤣 😂 Yeah, ok. 👌

"Afterburner ON... wait, where did the tail go?"

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It's not just cost. Adding an engine lowers the performance of the glider and drastically alters the weight and balance.

Overstated.

@@kiereluurs1243 Thanks. I was looking for a free proofreader.

Appreciate your comment!

Hahaaa, cool!

Jets do not use diesel 😳

@@benturp3492 This one does.

@@benturp3492 did your teacher also get frustrated with your comprehension skills

@@FarmerDrew I wasn't beeing taught proper English. Like you Americans can talk :)

@@benturp3492 Americans don’t speak proper English

Hahaha, in this case the ads algorithm works great :D

You should check out the SubSonex :P Keeping a glider in the air doesn't need that much anyway.

No you can't......

@@benturp3492 Yes, jets run on a ton of different fuels.

@@of_the_stone I am an aircraft engineer mate and I can tell you that they don't. Avgas, A-1, Jet-B and there's bio kerosene too. They cannot just run on anything!

@@benturp3492 👏🏅🏆 ok, you win. 🤦🏼‍♂️

@@of_the_stone you clearly have no idea what your on about mate. 👍 Good thing your not filling up planes with any kind of fuel that takes your fancy!

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The fuel has carbon in it, therefore the exhaust does too.

@@SnakebitSTI Not if you have a good burn going. There will be only water. You may have 20-50 ppm CO. Miniscule.

@@grabir01 It's a jet engine, not a nuclear fusion reactor. Carbon in -> carbon out. Hydrocarbons in the fuel get broken apart and oxidized in the engine. An efficient burn means the hydrocarbons are mostly converted to H2O and CO2. In practice, there will always be particulates from incomplete combustion and other pollutants like NOx and SOx compounds. To produce pure water exhaust, or close to it, you need to use pure hydrogen as the fuel and pure oxygen (not air) as the oxidizer.

@@SnakebitSTI I posted the carbon out measurement real time. IT is not zero. It is super low for sure. A very very efficient burn for sure.

Thank you! As mentioned in the video, the climbrate with a IAS of 135 kph is about 2.1 m/s. With 20l of Diesel fuel you should be able to gain 2500m of altitude.

The jet is mounted ~2° sideways So the hot center of the jetwash does not even touch the vertikal stabilizer

@@glucksi1655 At the LS4 it is mounted straight, but they needed to measure the temperature on many points on the fuselage to certify the glider. Of course they also tested at high outside temperatures.

@@glucksi1655 Or maybe underneath since it retracts?

Or maybe underneath since it retracts?

1903 - 1969. 66 years from the first 103 foot flight to landing Armstrong on the Moon. People who watched Apollo 11 remembered reading about the Wright Bros flight in the paper. Amazing.

do you need a licence to use this glider ? i mean...the question seems important to me. thanks

At the LS4 the jet is not installed in an angle because the short fuselage would cause a strange flying behavior. Of course the needed to measure the temperatures in extreme environmental conditions for the certification process. So everything is fine on this side. That´s true, the outside noise level is high and you should take care with noise sensitive neighbours.

@@pakkiaman2 Yes you need a glider licence but nothing special for the jet.

Or maybe underneath since it retracts?

Doesnt look like it. Long term effects are likely not taken into account. I cant find any aircraft where a jet turbine is point directly at a flight surface

There is an option for 60l fuel tank in the wings available aswell. Overkill imho :D

I have seen somewhere on their page that it takes 40 second to extend the jet and power it up to 30.000 RPM. Then it will take some more seconds to get the full RPM (95.000). So 50 - 60 seconds until the full power is available.

Most likely it's possible on a long runway but not certified for it ;) I have seen a video of a JS3 with this jet making a selflaunch.

Yes, "amazing" consumption - 65l. Especially these years. Take off generetates probably some risk that tail will burn - no cooling (no air flow at the first phase).

@@SteFly decades ago, diamant 18 with a microturbo éclair out of Altenrhein am Bodensee, registration HB-2020 . Easy take off, Fixed installation, no noticeable effect on sink rate, in a thermal could not notice it's presence. EFF made the modification.

@@podunkman2709 No problem: mixing cools the jet rapidly, soot deposit is small but visible.

Joe, 1 moving part is as reliable as it gets, once the electric starter gets it to ignition rpm. Electronic fuel control, simple compared with the one used on much larger engines. (FADEC)🇧🇴

With enough runway it probably could, but if you want a powered glider then there are purposefully built ones. Gliders sacrifice all for performance in the air, including the self launch capabilities, that's why it's a sport. Win some, lose some. If you want it back, you'll have to sacrifice performance and you get closer to a regular aircraft. The point of this kits is to increase flight time and add capabilities while keeping added weight and drag to a minimum.

@@moteroargentino7944 I have seen gliders with props on an electric motor that, just like this one, completely disappear into the fuselage, so they are aerodynamically no sacrifice, they are just like having a passenger behind you, some extra weight. And they have the ability to actually get in the air by themselves. So you think the extra weight is such a big sacrifice? This jet is obviously a very compact add-on that is strong enough to keep you in the air for quite a while, once you are up there. Maybe it also comes in handy if for whatever reason you end up above the clouds and you are looking for a safe hole to get back underneath again. I am not a glider pilot, but as a motor pilot this can easiely happen and then you are much more safe if you have enough fuel and can stay up there and find the right spot to descend, avoiding IMC.

Exactly!!!

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You would burn the 20 litres of fuel just trying to take off lol

No, it doesn't damage the tailplane but you should clean it after use of the jet.

The engine is in a slight angle

just dont do pougachev cobra or immelman with that things🤣

It's good enough to maintain speed for about 10min. This should be a requirement for gliders. If you need to stay in the air longer to get to a safe landing, the jet can be a life saver

I’m pretty sure the engine makes 420 newtons of thrust at max

Maximum of 350 Newtons ( 35kg) of thrust at 1.3 litres per minute.

There are gliders that use an electric propeller with folding blades to do more or less what this offers. I'm thinking that the jet is probably more weight efficient though run time is less.

@Michal, that information just 'can't' be found. It's not like we're on the "Internet" thingy that we've all heard about.

@@fredflintstone8569 thanks

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No way, there's too much surface friction

Maybe with a very long runway and some drop tanks. Slowly accelerate, take off, gain altitude, drop the tank(s) safely over the airfield to lower weight and drag, then perhaps it would be viable. A piston-prop setup would be far superior for a glider.

@@d00der41 I have seen videos of one taking off with jet power alone

@@FarmerDrew Yes, but at many places there isn't much fuel left after takeoff and climb to travel to ridges and thermals. These jet gliders don't have much distance after taking off, which is why he took off in tow. Hence why a piston-prop setup is an ideal powerplant for gilders.

Just flip the complete jet over so that it makes reverse :D

@@SteFly also can be used as hair dryer for pilot when the cockpit is open

Good question

The published climb rate is 360 feet/min, that's too small a margin for my taste.

all he need is a pistol with one bullet inside, that's enough.

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