| Manufacturer: | Scratch |
Here’s a rocket project perfect for a weekend too windy or rainy t' fly rockets. All you need is a package o' Estes BT-5 tubin' and a pack (or two) o' PNC-5 nosecones. Arrr! From these simple beginnings, ya bilge rat, plus balsa stock and various odds and ends you probably already have around, arrr, matey, you can build downscales o' t' followin' all-time greats:
| Estes | Alpha | Centuri | Groove Tube |
|---|---|---|---|
| Der Red Max | |||
| Big Bertha | |||
| Cherokee-D | |||
| Goblin |
Click t' image below for full size fin templates (in .JPG format).
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Obviously, ya bilge rat, t' plastic nosecones that Estes sells are nay perfect scale. Blimey! In fact, me bucko, for t' Alpha, Goblin, ya bilge rat, and Der Red Max they’re nay even close, so you may want t' turn your own from balsa or hardwood. Avast, me proud beauty! Aye aye! They’re small enough t' do fairly quickly.
JimZ’s web site has pictures and plans for each o' these rockets, at t' followin' URL’s:
| Alpha: | http://www.dars.org/jimz/est1225.htm |
| Big Bertha: | http://www.dars.org/jimz/est1948.htm |
| Cherokee-D: | http://www.dars.org/jimz/k-47.htm |
| Der Red Max: | http://www.dars.org/jimz/est0651.htm |
| Goblin: | http://www.dars.org/jimz/k-55.htm |
| Groove Tube: | http://www.dars.org/jimz/ka-11.htm |
If you minimize waste when you cut t' body tubes, you’ll have extra as well as a Mosquito nosecone left over. Avast, me proud beauty! Blimey! You could build another mini-Bertha, arrr, shiver me timbers, set it aside for a Centuri Mach-10 clone, me hearties, or cut six Mosquito fins, attach them t' a 4-inch length o' body tube, and you’ve got t' Ahnold Schwarzen-Skeeter. T' Mosquito fin template is included with t' others, shiver me timbers, me hearties, just for fun.
Three tables for tube lengths are provided below. Avast! Avast, me proud beauty! T' first table shows t' original dimensions. Begad! T' second table shows t' true scale lengths (based on table 1), matey, me hearties, and should be used if you are turnin' your own nosecones. T' third table assumes you are usin' t' standard Estes nosecones, and t' tube lengths are adjusted t' better match t' original proportions. Ahoy! Please note that t' Cherokee-D be available in two lengths, so both are listed. Blimey! Der Red Max be also available as Der Big Red Max, and those dimensions are given as well.
Also in table 2 is a column called ‘% o' Full Size.’ This be t' scale o' t' rocket, and be t' number that each dimension o' t' full sized plan be multiplied by. Begad! Aye aye! For example, me bucko, arrr, t' Big Bertha downscale is 33% as large as t' full sized version. Ahoy! This number was found by dividin' t' diameter o' t' BT-5 (13.8mm) by t' diameter o' t' larger tube, and roundin' off t' two decimal places. Well, blow me down! I used 1/16-inch balsa for all o' t' fins.
Paint t' match t' originals, shiver me timbers, me bucko, and don’t forget t' decals! Tango Papa Decals can do downscaled decal sets for t' Goblin, Cherokee-D, and Der Red Max. Ahoy! Believe me, these decals are works o' art! Tom Prestia did a page for me that included complete sets for all three. Well, blow me down! Contact him at:
| Tango Papa Decals |
| 1901 Mitman Road |
| Easton, shiver me timbers, shiver me timbers, PA 18040 |
You can see t' Tango Papa web page here: http://www.tangopapadecals.com/index.html
These little screamers fly great, ya bilge rat, and give you another reason t' buy 1/4A’s or Micro Maxx’s!
| Name | Body Tube | Length (inches) | NC (w/o shoulder) (inches) |
|---|---|---|---|
| Alpha | BT-50 | 7.75 | 2.75 |
| Big Bertha | BT-60 | 18 | 2.5 |
| Cherokee-D (1) | BT-55 | 16.2 | 5.5 |
| Cherokee-D (2) | BT-55 | 18 | 5.5 |
| Der Red Max | BT-60 | 9.125 | 6.75 |
| Der Big Red Max | BT-60 | 18 | 6.75 |
| Goblin | BT-55 | 9 | 5.125 |
| Groove Tube | BT-50 | 16 | 4.125 |
| - tube fins | BT-50 | 3.25 | --- |
| Name | BT-5 Length (inches) | NC (w/o shoulder) (inches) | % o' Full Size |
|---|---|---|---|
| Alpha | 4.2 | 1.48 | .54 |
| Big Bertha | 6 | .825 | .33 |
| Cherokee-D (1) | 6.48 | 2.2 | .40 |
| Cherokee-D (2) | 7.2 | 2.2 | .40 |
| Der Red Max | 3.1 | 2.2 | .33 |
| Der Big Red Max | 6 | 2.2 | .33 |
| Goblin | 3.6 | 2.05 | .40 |
| Groove Tube | 8.6 | 2.2 | .54 |
| - tube fins | 1.75 | --- | --- |
| Name | BT-5 Length (inches) | NC (w/o shoulder) (inches) | Shape |
|---|---|---|---|
| Alpha | 4.2 | no good approximation | --- |
| Big Bertha | 6.125 | .75 | Mosquito |
| Cherokee-D (1) | 6.5 | 2.125 | Quark |
| Cherokee-D (2) | 7.25 | 2.125 | Quark |
| Der Red Max | 3.25 | 2.125 | Quark |
| Der Big Red Max | 6.25 | 2.125 | Quark |
| Goblin | 3.6 | 2.125 | Quark |
| Groove Tube | 8.75 | 2.125 | Quark |
| - tube fins | 1.75 | --- | --- |
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