K-29B bomber + Y-38 fighter (stock props)

[sgt_flyer]

Hello, i present you the K-29 bomber and the Y-38 Thunder.

K-29/K-29B :

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The K-29B (the latest image in the gallery) has now replaced the original K-29

it's slightly heavier than the original one, but less parts (877 parts against 943 for the original), mainly because of the new engines.

the K-29B is powered by four ASASx12 torque engines (which require the limiters to be turned on at low speed operations (take-offs and low speed manoeuvers) (basically, the bearing's brakes are activated with key 1 to limit the engines speeds)

the bomber also have a fully working bomb bay, which can be opened and closed without problems. the bomb bay holds 12 bombs, in four columns of 3. (released two by two)

operations :

once the physics are loaded, use the parking brakes to stop the aircraft.

press key 1 to engage the engines limiters.

decouple two times to liberate the four engines.

switch vessel to get to the first engine. when the camera is in front of the aircraft, the engines on the left should have their roll trimmed so they turn counterclockwise. (alt+q) the engines on the right should be trimmed so they roll clockwise (alt+e) (basically, the propellers needs to turn in the same direction the sharp edges of the blades are facing)

once all 4 engines are running at full speed, switch back to the aircraft, and disengage the parking brakes.

let the aircraft get up to speed, at least 36m/s before starting to pull up very slightly (beware of tailstrikes) pull up the nose a bit (just stop before the tails it's the runway ) and the aircraft will lift-off at roughly 38m/s. climb a bit before levelling to get your speed back before starting to manoeuver

once at flight speeds, you can disable the limiters (again with key 1) to gain a bit more top speed.

you can now start to manoeuver / trim your controls as you wish

Bomb bay operations :

press the key for your action group 2 to open / close the bomb bay. once the bomb bay is open, you are free to stage the bombs to release them

Landings :

Slow down the engines with the limiters (key 1) before attempting landing

try to land as horizontally has possible, then brake to a stop (pull down during braking, to assist the brakes).

once stopped, engage the parking brakes, and switch to each engine top stop them with alt+X

Taxiing : trim the roll to 50% on two engines, for taxiing, with the other two stopped.

Here's the .craft file

http://www./view/hwgwddkp8fdcghg/K-29B.craft

old K-29 version :

http://www./view/rt3w7n41v3hff63/K-29.craft

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Y-38 Thunder :

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The Y-38 is a twin engine fighter, extremely pleasing to fly (also, with 409 parts, it's slowing down the game waaay less than the K-29 )

features two of my latest torque engine

equipped with 10 dumb (really dumb ) rockets mounted in pairs.

the new engine needs the use of a limiter (basically, the bearing's brakes) during stunts or take-off (else, at full unbridled power, the engines pop out of their bearings at very low speeds) - when flying at full speed, the limiters can be disabled for greater top speed.

Start-up Sequence :

enable the Parking brakes.

Press 1 to enable the limiters on the engines.

decouple the engines from the plane by staging once.

switch to the engine, and disable SAS for the engine if it's activated (key T as usual).

start trimming the first engine's roll to full (with alt+E or alt+Q, it has to spin in the same direction the sharp edge of the propellers blade are facing (counterintuitive given the direction of the props, but that's the most effective)

switch to the second engine, and repeat the previous step, and trim the second engine's roll in the sharp edge's of it's propeller's direction. (the two engines runs in opposite directions)

once both engines are at max trim, switch back to the plane, and disable the parking brakes.

once the plane reached at least 35m/s, pull up gently to take off (not too much beware of tailstrikes)

then, have fun !

if you wish to shoot some rockets, simply stage them

http://www./view/4bdwcej4u3dotum/Y-38_Thunder.craft

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a link to the subassembly of the engine can be found in this post on page 3 :

http://forum.kerbalspaceprogram.com/threads/92798-K-29B-bomber-Y-38-fighter?p=1397870&viewfull=1#post1397870

Edited September 7, 2014 by sgt_flyer

[Nik_601]

Oh, God! You're genious! Cargo bay, engines.. That thing's is amazing!

[AlexanderTeaH]

I'm working on a B-17 that's built similarly, I've been struggling to find an engine capable of lifting my project, however, your work on torque engines inspired me. Expect a ridiculously high-part B-17, coming to the KSP forums near you!

[gGATORr]

simply amazing work my friend!

[sgt_flyer]

I'm working on a B-17 that's built similarly, I've been struggling to find an engine capable of lifting my project, however, your work on torque engines inspired me. Expect a ridiculously high-part B-17, coming to the KSP forums near you!

Yes for high part count, i don't doubt so the engines on the K-29 are made of 116 parts - each.

If you create an higher torque engine, it will have even more parts (and on a b-17 that'll make a lot )

[AlexanderTeaH]

Erm, all it can get is ~7 m/s... Which makes it face-plant everytime I try to take off.

[xoknight]

Try rotating the props the other way

[sgt_flyer]

Make sure the engines are turning in the good direction (the propellers have to turn reverse of what would be realistic to work at full efficacity - the mysteries of ksp's control surfaces ) - it can achieve nearly 40m/s on the runway (or in level flight)

Basically, the propellers have to turn in the direction the sharp edge of the small control surface is pointing ( if you make them turn in the direction the blunt edge of the control surface is facing, it's efficacity will be much reduced)

Edited September 3, 2014 by sgt_flyer

[Ravenchant]

Stock...props? Wow. This is incredible!

[sgt_flyer]

ok, i clipped in a few more delta wings, moved the main landing gear a bit backwards, reworked the underside of the tail, and removed two I-beams i forgot to remove after using them for positioning the bomb racks

the K-29 can now take off at 38m/s, (roughly the middle of the runway) without needing the drop at the end of the runway anymore. (and it's a bit easier to fly ) (though you still need to beware the tailstrikes )

i replaced the .craft file in the main post - redownload it if you want the updated version , and i updated the first post

http://www./view/rt3w7n41v3hff63/K-29.craft

Edited September 3, 2014 by sgt_flyer

[Giggleplex777]

Can't get you rep right now, but the plane's brilliant.

BTW What happened to the new troque engines in the SPH pic?

[sgt_flyer]

Well, those are dry bearing engines (the landin gears are retracted in these ones - i just used these as guides because it's one of the few parts which don't get jerked around by torque engines they shake more than landing gear based bearings (and are a little less effective due to friction) those work approximately when i tested them on the K-25, because the fuselage buffered the vibrations. But two engines on the same wing is destructive (the vibrations from one will make the other stall - and with 12 asas units - a stall means rapid unplanned desassembly of the engine + the wing )

So i went with the original 8 asas units + landing gear bearings for it's higher reliability

Plus, they are heavier despite their smaller form factor i'll upload those as subassemblies on the WIP thread if you want to tinker with them ^^

edit : ok, added a link to the new engine to the WIP thread. (though i seriously doubt i'll ever put it onto the K-29 again too unreliable when using two of them per wing - i never could launch all four of them at the same time - one would break before full power to the four )

http://forum.kerbalspaceprogram.com/threads/66465-Work-in-Progress-WIP-Design-Thread?p=1393509&viewfull=1#post1393509

Edited September 3, 2014 by sgt_flyer

[gGATORr]

Dear sgt_flyer,

You, sir, are a genius. I have tried many times to crack the code to horizontal prop engines (had no trouble building a stock helicopter w/ vertical shaft), but have failed again and again at building a horizontal rotating shaft. Your idea of using the inclined adapter surface to stabilize in two dimensions is brilliant. And I didn't even know you could trim until you shared this. Again, brilliant! Your innovativeness has unlocked a whole new realm of possible aircraft, and for that, I thank you! So without further ado, I modified your engine design a bit, and built a B-25ish aircraft!

[Giggleplex777]

gGATORr: How stable are your props? Can you post the .craft file so I can take a look?

[gGATORr]

gGATORr: How stable are your props? Can you post the .craft file so I can take a look?

They're a little rough getting started, but once they get turning, they're pretty smooth. I didn't notice any vibrations or ill effects. Here you go.

[Scarecrow88]

That looks like an interesting craft, so I downloaded it to give it a go, but I must be doing something wrong. I can get the engines rotating, using alt+e or alt+q as appropriate, but as soon as I let go of the keys, the engine stops. Any hints or tips?

[LvL]

holy moly! but.. just... HOW DO THE ENGINES WORK? *brain explodes*

[sgt_flyer]

That looks like an interesting craft, so I downloaded it to give it a go, but I must be doing something wrong. I can get the engines rotating, using alt+e or alt+q as appropriate, but as soon as I let go of the keys, the engine stops. Any hints or tips?

Mmmh, if you activated the plane's SAS before decoupling the engines, don't forget to disable it for the engines

[Scarecrow88]

That could be the problem

[AlexanderTeaH]

Make sure the engines are turning in the good direction (the propellers have to turn reverse of what would be realistic to work at full efficacity - the mysteries of ksp's control surfaces ) - it can achieve nearly 40m/s on the runway (or in level flight)

Basically, the propellers have to turn in the direction the sharp edge of the small control surface is pointing ( if you make them turn in the direction the blunt edge of the control surface is facing, it's efficacity will be much reduced)

Oh, it seems that that's something you should include into the description. xD

[sgt_flyer]

K-29B in the works - with better torque engines + 4 bladed props for higher thrust (but lower peak speed) (so climb manoeuvers etc will be easier).

take off is way much easier with the new engines.

the new engines weight a bit more, but have a lower part count (from 113 to 95 parts per engine)

soon

[Rune]

That plane is awesome. The propellers, doubly so. Still, if it's meant to be a B-29 replica, that vertical stabilizer should be like twice as big. I would like to try it, but the part count gives me shivers. Perhaps I'll grab the engine and work a smaller escort fighter (since top speed is limited, formation flying should be easy, right?).

Rune. Great kudos to you!

[sgt_flyer]

it's called K-29 for a reason

that thing's already big enough as it is it's inspired by the B-29 (with some elements of design inspired by it, such as the tail), but a full replica would be awkward in terms of part count and tweakings

and you'll want the new engine for a fighter (tri bladed version) it's much more effective (the K-25 prototype had a top level flight speed of 59m/s with two of those tri-bladed new prop engines )

with 4 bladed props + it's weight and drag, the K-29 tops at around 46 m/s.

Edited September 4, 2014 by sgt_flyer

[sgt_flyer]

Ok, i added the new Y-38 Thunder to the first post (so now, the K-29 can have something to escort it )

K-29B soon, with the new engines to power it (and modified control surfaces, so less trim is required).

[sgt_flyer]

remotorised K-29B released first post updated for operations on the K-29B (muuuch easier to take-off with it, thanks to the more powerfuls engines )

also, here's the subassemblies for the engine + props :

(never put them with symmetry - create your plane with symmetric engine attachment points, then place the engines 1 by 1)

Torque Engine 4 Stacks of 3 ASAS units with Landing Gear Bearing (or TE-4S3-LGB engine )

the engine is preconfigured with action group 1 for toggling on the brakes on the landing gear bearing - to limit the engine's speed (when you're at very low speeds) - increases the torque transmitted to the plane a bit, so be careful with single engine aircrafts.

the gear / brakes / lights action groups are removed for the bearing.

the engine has been saved as a perfect subassembly, so the struts will reattach themselves correctly.

props : from left to right : 3 bladed CounterClockwise prop, 4 bladed CounterClockwise prop, 4 bladed Clockwise prop, and 3 bladed Clockwise prop.

here's the link for the five subassembly files (the engine can be opened alone in the VAB) the engine + the 4 style of props:

https://www./folder/8tb26un7d7qb1j9,m77vhs15qsqrjd2,ewmj1n7u251k2hw,r3rxwjsnab2sojs,u4df0297s5ej2de/shared

Edited September 6, 2014 by sgt_flyer