Cheapest cost to orbit

[Jokpau Gaming]

Hello, everyone!

I have been wondering, what's the cheapest thing, that can go to orbit. I have tried a few designs myself, but I want to compare them to others.

The challenge is to spend the least funds to go to LKO (low kerbin orbit). It must be at least a bit over 70 km on periapsis. Recovering parts doesn't count. I would like the vesels to be from 1.11, but other versions are accepted.

There will be two main ctegories: modded and stock. 

Stock: 

1. 690 by Dvader

2. 1171 by camacju

3.

4.

5.

Modded: 

1. 310 by Jokpau Gaming

2. 1137 by jimmymcgoochie

3.

4.

5.

You need to post a picture of your craft in VAB/SPH, in flight and in orbit with periapsis shown. Craft files would be appreciated too!

No cheats, of course.

I will edit this post to add winners and explain something, if it's not clear yet. Good luck!

Edited July 15, 2021 by Jokpau Gaming

[camacju]

I'll kick this challenge off with a 1171 fund rocket.

In VAB

Pre-tilted Hammer booster for first stage

First stage is hot decoupled and second Flea stage boosts to suborbital trajectory

Jetpack finishes orbital insertion

I didn't even need the extra fuel cylinder

Edit: The Flea booster is too inefficient for this challenge. You could get significantly better performance, for lower cost, with a Shrimp or Mite booster instead. The Flea stage has 1347 m/s of delta-v, but swapping the 200 fund Flea out for a 150 fund Shrimp gets 2156 m/s of delta-v for 675 kg less mass, and swapping it out for a 75 fund Mite gets 1495 m/s for 1125 kg less mass.

Second edit: I wasn't accounting for the mass of a fully loaded kerbal. Now the Shrimp gets 1787 m/s compared to the Flea's 1213 and the Mite's 1136.

Edited March 9, 2021 by camacju

[Jokpau Gaming]

Added you to the leaderboards!

[jimmymcgoochie]

A bit late, but here's my entry in the modded section:

Cheapo 1, 1137 funds to orbit. Two mod parts, both from Restock+: Oscar-D fuel tank (4x Oscar-B) and 0.625m fairing.

The whole rocket is tilted a few degrees east so that it will fly a ballistic gravity turn; due to a complete lack of guidance on this stage, this often resulted in serious deviations from the desired trajectory, often ending up horizontal after 30 seconds of flight- going east or west! It didn't help that Jeb decided not to wear his helmet and so had to put it on every single time I launched.

Once the Shrimp SRB burnt out, the Spark LF engine took over. A combination of engine gimbal and aero stability from the fairing helped keep it on track.

I was a bit too busy trying to fly the thing to get any more screenshots, but Jeb made it to orbit with propellant to spare:

There were some, um, interesting side-effects of repeated reverts- sometimes it would load in as this:

[Spaceman.Spiff]

3 minutes ago, jimmymcgoochie said:

sometimes it would load in as this:

It’s Magic 

[Stormpilot]

1 hour ago, Spaceman.Spiff said:

It’s Magic 

Your a wizard spiff *intense Harry Potter theme playing*

[Jokpau Gaming]

So I made a craft that is a bit too op.  I cant seem to add any pictures here, so I will post a link to an imgur post: https://imgur.com/a/ebgjGid

It costs 310 credits, a mass of 0,009 tons, modded

Edited May 3, 2021 by Jokpau Gaming

[Jokpau Gaming]

I made an even smaller version that could go to orbit, but kraken doesn't like it, so it's unflyable

[Rocket Factory Augsburg]

We do have some experience in KSP as well, but we try to bring down the costs for small rockets in real life as well by our RFA One. Who wants to try building it...? 
Many greetings from Augsburg, Germany 

Edited July 6, 2021 by Vanamonde

[dvader]

I'm very late to the challenge but here's a stock craft for only 690 pesos. The fuel flow priority is higher in the lower tanks to give some stability during ascent. It requires a bit steeper ascent to get out of the thick atmosphere before the tanks get too empty and the center of mass shifts  toward the back causing it to tip over.  I noticed you can actually use SAS in the sandbox even though the Stayputnik should not provide it. I chose not to use it  since it felt like cheating.

I kept the engine running at a minimum during coasting to keep it controllable.

There's 200 m/s left with Pe 91km and Ap 427 km.

 

[Jokpau Gaming]

cool! sorry for not responding for so long