Idea Chandrayaan-2, Vikram lander and Pragyan rover

[gattispilot]

I think It is too tall? It seems it should be lower to the ground? I think it should only hab 4 wheel sttering and no crab walk.

But it lower the wheels may not have clearance for turning?

 

[gattispilot]

I found this:https://www.chandrayaan.com/chandrayaan-2/chandrayaan-2-design/chandrayaan-2-pragyan-rover.html
It mentions the steering. So no steerable wheels

 

[Gargantua2024]

Weird that Pragyan doesn't have steerable wheels...does that mean that it can only travel in one direction? Also iirc the rover has six wheels, not four

 

[gattispilot]

Weird that Pragyan doesn't have steerable wheels...does that mean that it can only travel in one direction? Also iirc the rover has six wheels, not four

Yes 6 wheels. I think because that middle wheel is black it gets left out. It steers like a tank. Skid steering.
https://www.ri.cmu.edu/pub_files/pub1/shamah_benjamin_1999_1/shamah_benjamin_1999_1.pdf

Steering is accomplished by differential speed of the wheels or skid steering.
and APXS

I think mine's body is too tall?

 

[gattispilot]

I redid the body. Added the APXS. The only odd thing. Is the touchdown part is not doing thing until I move?

PAR:PRA_ROVER2 STATUS Landed Moon POS 32.3481675 -69.3675371 HEADING 31.01 ALT 0.109 AROT 20.472 -23.313 159.835 AFCMODE 7 NAVFREQ 0 0 XPDR 0 PANEL 1 1.0000 FPANEL 1 1.0000
//Adapted from GeneralVehicle by fred18 void Pra_rover::SetTDVTXStuff() { double x_target = -0.1; double stiffness = (-1) * (ROVER_MASS * G) / (3 * x_target); double damping = 0.9 * (2 * sqrt(ROVER_MASS * stiffness)); Height_From_Ground = .109; for (int i = 0; i < ntdvtx; i++) { tdvtx[i].damping = damping; tdvtx[i].mu = 3; tdvtx[i].mu_lng = 3; tdvtx[i].stiffness = stiffness; } tdvtx[0].pos.x = cos(30 * RAD) * 1.55; tdvtx[0].pos.y = -Height_From_Ground; tdvtx[0].pos.z = -sin(30 * RAD) * 1.55; tdvtx[1].pos.x = 0; tdvtx[1].pos.y = -Height_From_Ground; tdvtx[1].pos.z = 1.55; tdvtx[2].pos.x = -cos(30 * RAD) * 1.55; tdvtx[2].pos.y = -Height_From_Ground; tdvtx[2].pos.z = -sin(30 * RAD) * 1.55; SetTouchdownPoints(tdvtx, ntdvtx); }

 

[gattispilot]

Added reflective panels

I might look at the Lander. and the rover deployment.