Keep in mind the the Estes E15s were commercially available for a little less than one year, the E9s have been available since 2001, and the E12s have only been available for about 9 or 10 months.
Type: Posts; User: mwtoelle
Keep in mind the the Estes E15s were commercially available for a little less than one year, the E9s have been available since 2001, and the E12s have only been available for about 9 or 10 months.
Semroc Series 9 tubing (ST-9) is a heavy-duty version of BT-50. For 29mm motors use the heavy duty Series 115 (LT-115). The inside diameter of Series 13 tubing ST-13 is 33.02mm.
It appears that when Estes changed the color scheme and decals recently, they switched from the BT-20B (8.65") that was used since at least the mid-70s back to the BT-20J (2.75"). So much for kit...
If you turn the rocket upside down and the nose cone falls out, it is too loose. If it is loose add some tape to snug it up. The nose cone should be snug, but not really tight. Are you using the...
An Aerotech E20-4, E30-4 or F32-4, should work.
Semroc reproduces many body tubes from defunct companies, notably Centuri (standard and Large Scale) and FSI. They also reproduce many of the old Estes sizes, including BT-2, BT-3, BT-30, BT-40,...
Order some ST-13 or LT-125 from Semroc. BT-56 is the Estes designation for the old Centuri ST-13. The first appearance in the Estes line was the Astrocam 110 (1327) and Challenger II (1330). It is...
It seems the ratio of Copperhead failures is directly proportional to the number of people watching. In my experience, they almost always work if I am flying by myself. At a big launch, they don't...
Why not just have nose cone and transition turned as one piece, or are you trying to keep the weight down? Also, what motors do you intend to use?
I have used motors up to about 28 years old at the time of launch without any problems. It really depends on how the motors were stored. If you store them in a cool and dry place where the...
The "washers" in that kit are lead weights and weigh about 0.12 oz. a piece. You should have about 0.6 oz. in the front of the pod. Hope this helps.
These days I would use an Apogee E6-P or one of the Aerotech RC-RMS-24/40 motors. They are much easier to find than D11-Ps or E9-Ps.
All of the B-52s in service are of the B-52H model. The B52-G was the most numerous variant at 238 produced, but most of them were chopped up under the START agreements. There were 102 B52-Hs...
If you want a really good orange, probably the best way to get it is by using the silk screen process and supplying your own ink. Probably a bit more work than you would want to do for a one-off job.
There's just something about those old classic designs that appeals to me and a lot of rocketeers, it seems.
You could try cloning as Estes Avenger. The rocket is similar in size to the Long Tom. Semroc has most of the parts. They can be found here:...
To Date:
6 of the E15s - no CATOs.
0 of the E12s
10 of the E9s - no CATOs.
When you fly it, make sure the booster motor is in tight. I have had it light the upper stage motor and kick out the booster motor while leaving the booster airframe attached. Try a A8-0/A8-5 or...
If it is an early kit, check for a black stage coupler and a blow-molded one piece nose cone. Later kits (92+) have a brown coupler and the current two-piece injection PNC-50-YR. I have built two...
(2.500"-2.420")/2 = 0.40". Remember, you are measuring two walls between the inside and the outside diameters.
The Estes 2.5" tubing specs are OD: 2.50" ID: 2.42" Wall Thickness: 0.040".
The BT numbers are fairly arbitrary. The only constant is that bigger numbers have larger diameters than the smaller ones. One reference is here:...
As I said before, RASAero will accurately simulate supersonic flights. If you are proficient with MATLAB you might be able to write a script that can calculate what you are looking for.
For the...
Actually, Rocksim has some problems with simulating supersonic flight. There are also some issues with correctly simulating nosecone aerodynamics as well. Rocksim also does not simulate fin flutter...
If you fill a Dude with expandable foam, it going to be a real PITA to transport.
Unfortunately, the easiest way to get PNC-60AH nose cones these days is to rob them from another kit. I actually bought a Mean Machine get get the cone for an Omega clone back in the 1998 - 2000...
All of the G33s that I have flown used a two-piece C-slot grain design that required the two grains to be taped together. The motors in question were purchased between 1994 and 2002.
+1 on the HBOMR for the basics. Anyway, most of the topics you would be interested in would be covered in the 1st semester of college physics. To really get a handle on how the math in the flight...
Generally, anything on a streamer is going to descend pretty quickly. Now, if you building competition models for Streamer Duration (SD), that is an entirely different story.
There is not really any room in the Micron or the Mark for a wider streamer, so using a wider streamer is not an option. Either of the two rockets should descend at a similar speed on the same size...