Is this the longest ramp jump ever attempted in ksp?

[Roflcopterkklol]

decoupling wings at the ramp would be fine, but you'd also have to turn off the jets at the ramp.... jets on while pitched up = I could do the same and orbit kerbin.

The pitching up and a combination of jet thrust + wings = I'm going to have to say that while its a cool contraption, I don't think its a fair entry for "longest ramp jump"

It's a land craft, it can not fly no matter how hard you point the nose in the air so i am still calling it legit.

The only thing using the jets can do is prolong the air time not make it fly and the aerodynamics do the opposite, they push the craft back towards the ground.

Decoupling the "wings" at the ramp also presents the problem of the craft being unusable after the jump.

[KerikBalm]

"It's a land craft, it can not fly no matter how hard you point the nose in the air so i am still calling it legit. "

Then I can make one with a 0.99 TWR... and call it legit?

"The only thing using the jets can do is prolong the air time not make it fly and the aerodynamics do the opposite"

The only thing a lot of wings would do without any propulsion is prolong the time in the air.

Its not a jump if there is additional impulse after leaving the ramp..

There is a vertical component to the force from those jets... I don't see how this is qualitatiely different from having wings provide said force.

"the aerodynamics do the opposite, they push the craft back towards the ground. "

Not if they have a positive AoA.. which they do after leaving the ramp.

Your craft is thrusting and generating aerodynamic lift... I can't see how its fair to compare this craft to others that jump from a ramp and continue on a ballistic trajectory.

IMO, if you're not on a ballistic trajectory after leaving the ramp, its not a jump...

*edit* so I downloaded this craft, and here are my observations:

Static thrust is 600 kN from 4 basic jets that can produce 150 kN each. Your craft weighs less than 30 tons. Each ton needs 9.82 kN to counteract gravity. I'm going to just call it 300 kN.

Your craft has better than a 2:1 TWR -> this means when you pitch up more than 30 degrees, it can fly on jet thrust alone.

I also note that your wings are angled down at about 20 degrees, so when the prograde marker is more than 20 degrees below where the nose is pointing, the wings are generating lift.

Combine these, and when your nose is pointing up 30 degrees, you can fly on jet thrust alone, and your wings have a 10 degree positive AoA.

This thing can fly, but it is unstable because of the thrust vector not being inline with the CoM.

So I made *1* change to your craft... I rotated the engines so that the thrust vector pointed through the CoM.

Trolololol

Edited February 14, 2015 by KerikBalm

[Roflcopterkklol]

You will never jump anything over the entire KSC without assistance to keep the speed in the air, thats the point of what i did here.

Anywho seen as you want something to compete with that is by some guide lines that can be replicated here you go man.

Rules:

Must be 100% stock.

Must jump using the lip to the right of the runway near the SPH.

Jet engines off at start of ramp.

no aerodynamics.

Must land the jump.

Here is my attempt.

i will make a thread on the challenge board about it.

Edit: made a thread about it.

http://forum.kerbalspaceprogram.com/threads/110568-Who-is-the-best-dare-devil-in-KSP?p=1733898#post1733898

Edited February 14, 2015 by Roflcopterkklol

[KerikBalm]

You will never jump anything over the entire KSC without assistance to keep the speed in the air

That's not true....

While I did suffer some unscheduled dissassembly when rendevousing with the ramp, there were some problems with control of the orientation, resulting in a trajectory that intersected the ramp by the administration building instead, anyway brave Bob was able to clear all the buildings, including the VAB, and go past the launchpad...

Poor bob....

Building high speed land-craft isn't really my thing, I mainly focus on the flying and space-ing... which is why when I saw your craft, I saw its flight potential...

But in stock soup-o-sphere, you'll want to have as much mass as possible with low drag coefficients...

When jumping, you'll rely on inertia...

20 tons of mk1 inline cockpits will have less than half the drag of 20 tons of mk1 pods.

0.08 vs 0.2 drag coefficient = only 40% of the drag.

Then I ditched the basic jets for clusters of 48-7s... because of their better TWR (ideally, I'd want to be nearly out of fuel at the jump, so I don't have mass in those draggy 0.2 drag coefficient tanks).

Your craft made no use of lower drag parts, and uses jet engines instead of higher TWR rockets, so you'll get less speed before the jump, and you'll lose it faster after the jump.

For me... its the structural integrity when hitting the ramp...

Edited February 14, 2015 by KerikBalm

[Roflcopterkklol]

Your craft made no use of lower drag parts, and uses jet engines instead of higher TWR rockets, so you'll get less speed before the jump, and you'll lose it faster after the jump.

For me... its the structural integrity when hitting the ramp...

That is the hardest part haha, the entire frame of my craft is built out of structural blocks because of their crash impact tolerance (and they add suspension when set up like i have them)

Then there is making it stable enough to not crash after actually landing if it can survive the impact, landing hurts as much as take off

Really though, the jet ATV was made to do 100m/s on land reliably (can let go of the controls no matter the terrain) and 90m/s reliably on water, building it to those specs seemed to make it strong enough to do big jumps which was just an added bonus really

Did you check out the jump challenge btw?

http://forum.kerbalspaceprogram.com/threads/110568-Who-is-the-best-dare-devil-in-KSP?p=1733898#post1733898