Another Flipping Problem (eve)

[Laie]

On 9/22/2018 at 1:15 AM, Plusck said:

if your upper, singly aerospike stage is lacking power

As he mentions a TWR of 1.4, I supect it's not lack of power, but excess drag -- which I've taken to mean that he's simply moving fast.

Reposting today's WIP:

Fist stage can barely take off, but still gets the vessel to 600m/s at 10km. Second stage again has such a low TWR that it can't even maintain it's velocity for a while -- never mind, it picks up later and eventually delivers quite a punch.

For all these apparent flaws, the lifter as a whole works nicely. Starting at a beach (~100m ), it makes orbit easily with a couple hundred m/s to spare.

In case anyone wants to try it: By the time the second first stage burns out, it should be pointed at about 70° with SAS already locked to prograde. Second stage is stable enough in flight, but likes to flip on staging. SAS-to-prograde is mandatory at this point .

On 9/22/2018 at 1:15 AM, Plusck said:

one of the main drawbacks of the Vector: without tweaking it, it is far too fast and excessive in its gimbal movements and can easily shake a ship apart.

Quoted for truth.

Edited September 30, 2018 by Laie

[GuyWithGlasses]

On 9/23/2018 at 12:00 AM, Laie said:

As he mentions a TWR of 1.4, I supect it's not lack of power, but excess drag -- which I've taken to mean that he's simply moving fast.

Reposting today's WIP:

Fist stage can barely take off, but still gets the vessel to 600m/s at 10km. Second stage again has such a low TWR that it can't even maintain it's velocity for a while -- never mind, it picks up later and eventually delivers quite a punch.

For all these apparent flaws, the lifter as a whole works nicely. Starting at a beach (~100m ), it makes orbit easily with a couple hundred m/s to spare.

In case anyone wants to try it: By the time the second stage burns out, it should be pointed at about 70° with SAS already locked to prograde. Second stage is stable enough in flight, but likes to flip on staging. SAS-to-prograde is mandatory at this point .

Quoted for truth.

 

Hi!

I've been a little busy last weeks, I was only able doing some test.. and yes, vectors gimbal is quite powerful, resulting in great explosions while staging xD

Your design flies quite well btw, one of my lastest test..

 

It did succesfully orbit with around 800m/s to spare launching at 2500 metres (when I learned the gravity turn in eve is at 30-35Km instead of 10km, lol), Ive to test it near a shore..   now Im testing to attach a minirover to get more science from a few biomes near the landing site (an transfer it to the rocket's probe core..).

Now, the rocket can land only with the chutes, but launching TWR is awful xD (0.99, the "landing legs" are full of Ox+LF lol),

 

Cheers