TWR of exactly 1.0 for the entire trip to the moon and back.

[Cashdesigner]

Ditto

[Scarecrow71]

TWR of 1.0 might - and that's a pretty strong MIGHT - get you off the launchpad.  Maybe.  And just barely.  And will waste a whole lot of fuel to do so.

The biggest detriment to this challenge, apart from having zero rules other than TWR to the Mun and back, is that the stock game doesn't display TWR in any fashion.  You need a mod like Micro-Engineer to display this for you.  Not to mention that you will be fiddling with the throttle the entire time you are flying (and there may be times where your TWR is less than 1.0 due to low gravity and the engine you are using).

All told, I'm not sure this challenge is do-able.  I mean, I'll give it a shot at some point...but I don't think you can get off the launchpad at 1.0.

[s_gamer101]

A TWR of exactly 1 doesn't get you anywhere because having a TWR of 1 means that the weight and the trust of your ship ar equal and therefore cancel each other out. This challenge is physically impossible

[s_gamer101]

On 4/20/2023 at 12:52 AM, Scarecrow71 said:

and there may be times where your TWR is less than 1.0 due to low gravity and the engine you are using

Lower gravity means higher TWR, not lower TWR

[Superfluous J]

1 hour ago, s_gamer101 said:

Lower gravity means higher TWR, not lower TWR

That assumes the OP means "TWR=1 at Kerbin's Surface" and not "TWR=1 relative to the gravity field you're in right now, changing throughout the challenge."

Now both are fine assumptions, but there's no way to know if the OP meant one or the other.

Mostly because the entire challenge is:

On 4/19/2023 at 2:29 PM, Cashdesigner said:

Ditto

 

[AtomicTech]

Perhaps a revision of "a TWR of 1.01 to the Mun and Back"?

[DerkyJerkyWreaksHavoc]

On 4/19/2023 at 6:52 PM, Scarecrow71 said:

TWR of 1.0 might - and that's a pretty strong MIGHT - get you off the launchpad.  Maybe.  And just barely.  And will waste a whole lot of fuel to do so.

The biggest detriment to this challenge, apart from having zero rules other than TWR to the Mun and back, is that the stock game doesn't display TWR in any fashion.  You need a mod like Micro-Engineer to display this for you.  Not to mention that you will be fiddling with the throttle the entire time you are flying (and there may be times where your TWR is less than 1.0 due to low gravity and the engine you are using).

All told, I'm not sure this challenge is do-able.  I mean, I'll give it a shot at some point...but I don't think you can get off the launchpad at 1.0.

Well Actually (*nerd moment), a TWR of 1.0 is when the rocket's thrust is equal to its weight, determined by the planet's gravity. At a TWR of 1, the ratio is balanced and therefore the rocket theoretically never moves.

Spoiler

Disclaimer: This nerd speech does not include the fact that as fuel drains, the weight of the craft decreases, and the ratio climbs over 1.

Spoiler

_{Advice each sold separately}

Spoiler

_{For well qualified buyers only}

 

 

 

Edited April 23, 2023 by DerkyJerkyWreaksHavoc

[Cashdesigner]

On 4/23/2023 at 3:50 PM, AtomicTech said:

Perhaps a revision of "a TWR of 1.01 to the Mun and Back"?

Yeah that would probobly be more doable

 

[DennisB]

In theory it's possible to start from Kerbin and Mun and to land on Kerbin, but I don't know how to land on Mun.

1. Landing on Kerbin is obviously possible with aerobraking.

2. Launch from Kerbin should be also possible. You can start horizontal with a plane, compensating the gravity with aerodynamic lift.

3. Launch from Mun would be much more difficult, because of the absence of an atmosphere. You would have to start horizontal again, and reach orbital speed, driving on the surface, or a little less, if you have a slope, which you can use as a ramp.

But I have no idea, how to land on Mun, because you have to do it, with nearly orbital speed (with unbreakable parts?). And I also don't know, how you could adjust the throttle, keeping TWR=1 all the time (is there a mod for it?).

I have no intentions to participate in the challenge, and I don't have KSP2. I made just some thoughts.

Edit: Probably it should be TWR<=1, because with TWR=1 all the time, you will run out of fuel before you reach Mun.

Edited April 30, 2023 by DennisB

[QF9E]

59 minutes ago, DennisB said:

But I have no idea, how to land on Mun, because you have to do it, with nearly orbital speed (with unbreakable parts?).

To be fair the challenge does not say in so many words that you have to land on the Mun, only that you have to make a trip to the Mun. It seems to me that a free return trajectory around the Mun would suffice.

[Bej Kerman]

4 hours ago, David james said:

Achieving a TWR of 1.0 in Kerbal Space Program is challenging and might not be possible. The stock game lacks a TWR display, requiring mods like Micro-Engineer. It would involve constant throttle adjustments and could waste a lot of fuel. Good luck with your attempt, but it's a tough challenge.

Don't forget the fact it's physically impossible.