Rocksim file needed: Estes Optima or The Shadow

After reading a build thread on an Estes Shadow, I realized I wanted to build one of these, but didn't want to pay $45 for a kit. I already have most of what I need except a rocksim file or list of BT lengths, fin measurements, and placements. Does anyone have this info?

Thanks.

Is this the Shadow kit you are referring to?

Shadow instructions

If this is the one, it looks like most of the info you need is there.

Thanks. But the measurements on the large tubes is not very clear. Is it 14 3/16 or 14 1/16?

bigone5500 said:

After reading a build thread on an Estes Shadow, I realized I wanted to build one of these, but didn't want to pay $45 for a kit. I already have most of what I need except a rocksim file or list of BT lengths, fin measurements, and placements. Does anyone have this info?

Thanks.

Click to expand...

I've attached a couple of Rocksim files. The "clone" file is of my Shadow clone made from Aerotech parts. I basically used an Aerotech kit and replaced the plastic fins with ones I cut from plywood.

The Optima one is by Roger Banks. I assume I got it from EMRR:

https://www.rocketreviews.com/

-- Roger

View attachment oop_estes_optima.rkt

View attachment shadow clone.rkt

I loved the Shadow/Optima. The Aerotech E11 was my favorite motor for that rocket .

bigone5500 said:

Thanks. But the measurements on the large tubes is not very clear. Is it 14 3/16 or 14 1/16?

Click to expand...

14 and 3/16

kj

Thanks guys. I hope to be able to start work on this asap. I'm going to go with a single 24mm MMT as I'll probably not use anything less than an F12J in it.

bigone5500 said:

Thanks guys. I hope to be able to start work on this asap. I'm going to go with a single 24mm MMT as I'll probably not use anything less than an F12J in it.

Click to expand...

That would be a good choice for a "stock" Shadow clone. The Shadow never flew quite high enough on a D12 motor to ensure that the 'chute had time to deploy. My original Shadow suffered quite a few broken fins and dents from rough landings when flying on a D12. Using an Aerotech E15 worked much better.

As I said, I built my Shadow clone using Aerotech parts and thin "through-the-wall" plywood fins. The rocket's heavier than a standard Shadow so I fly it on motors like the F23 or G38.

-- Roger