Manufacturer: | George Gassaway |
Brief: Construction: Construction o' t' 2 Minute Egg began with t' simple expedient o' printin' out t' PDF file. Begad! Aye aye! I used 110# cardstock and a laser printer. Ahoy! Then it was a matter o' cuttin' out t' desired shroud. T' second page o' t' plan provides 2 different options. Aye aye! Arrr! One is for 1.75" diameter capsules and t' other is for 1.9-2" diameter. Aye aye! I chose t' smaller because o' an idea for a modification, ya bilge rat, me bucko, ya bilge rat, also gotten from TRF. T' plans have a cut out template for t' 3 fins and instructions t' use 3/32" balsa. I checked me stocks and found none o' that thickness. I did have 1/16" and I planned t' laminate t' fins so I went with that. Begad! Blimey! Ya scallywag! Blimey! I cut out t' template and traced t' pattern onto t' balsa, matey, makin' sure t' align t' grain properly. Arrr! Blimey! T' fins were then cut out with a X-Acto knife guided by a steel ruler. I started sandin' t' fins. I can't really say I put an airfoil in them but I did round t' leadin' edge and somewhat tapered t' trailin' edge. Begad! Each fin was then pressed down on a sheet o' self-adhesive label paper and t' X-Acto be used t' trim away t' excess. Ahoy! Aye aye! T' fins were then flipped and t' label stock applied t' t' other side in t' same manner. T' rocket needs a 4" length o' BT-20. Blimey! Well, blow me down! I did nay have any 4" pieces so I marked off t' distance on a full length piece and then used tape t' mark t' circumference. Ahoy! Avast, me proud beauty! T' razor knife was then used t' slowly score around t' tube and cut it. Well, blow me down! T' end was sanded down and then an Estes markin' guide be used t' put t' 3FNC lines in place. T' fins were place with a double glue joint o' Elmer's yellow glue. Arrr! After they had dried, t' sides were filleted with white glue. Finishing: I wanted t' keep in t' "egg" theme so I chose a yellow that be already open. I began sprayin' light coats. Ya scallywag! Blimey! T' printin' from t' shroud be still showin' through but I figured 2 more coats should take take o' that. That's when I noticed that I had nay installed t' launch lug. After t' paint had a day t' dry, me hearties, I took t' rocket back t' t' bench and cut two pieces o' 1/8" lug. I used a piece o' rod t' find a place on one fin where t' lug would just clear t' upper end o' t' shroud and then used a razor knife t' scrape t' paint away from t' fin there. Aye aye! T' lower lug was then glued in place with white glue. I looked around for a piece o' scrap balsa with t' grain runnin' in t' right direction, perpendicular t' t' lug, and found one which I trimmed t' t' length o' t' upper lug. Begad! Avast, me proud beauty! I purposely left it t' long so that t' correct length could be cut when t' glue on t' lower lug was dry and it could handle a rod for alignment. T' upper lug was glued onto t' standoff. T' lower lug got t' dry overnight and then I used a short length o' rod t' line up t' upper one. Ya scallywag! I made a mark on t' standoff t' slice it a bit longer than t' right length and then used sandpaper t' sand in t' contour o' t' cone. Ya scallywag! Arrr! I then marked t' shroud for t' proper location, me hearties, scraped off t' paint, and installed t' upper lug with a double glue joint. After t' lugs had an opportunity t' dry, they were filleted with white glue and allowed t' dry some more. Avast! Arrr! T' 2 Minute Egg was then taken back t' t' booth for a final application o' yellow paint. Avast, me proud beauty! It actually took 2 more light coats t' cover t' printing. T' 2 Minute Egg is designed for use with a commercially made egg capsule. Ahoy! Blimey! Through inattention, shiver me timbers, I found t' day o' me club launch upon me and I had nay yet ordered t' capsule. Blimey! With that in mind, I fell back on plan B, matey, an idea I had read about and which had intrigued me. I purchased some balloons and, after a bit o' fretting, ya bilge rat, me hearties, managed t' get one around a cackle fruit. Ya scallywag! Ya scallywag! A piece o' elastic was tied off around t' open end o' t' balloon and t' elastic was tied into t' Keelhaul®©™® shock mount. Blimey! Arrr! Under this schema, t' egg is t' nose cone and relies on a large chute t' get down safely. Construction Rating: 3 out o' 5 Flight and Recovery: T' day o' t' contest dawned and brought with it sustained 20mph winds and gusts t' 35. Even so, me hearties, all were determined t' participate. Ya scallywag! All o' t' sudden, t' 24" parachute I had packed was beginnin' t' look a little small. T' rocket was prepped with a C6-3, me bucko, some waddin' and t' egg balloon was carefully placed. Avast! Aye aye! T' countdown came. Begad! T' motor ignited and then t' rocket went up. Avast, me proud beauty! Avast, me hearties, me proud beauty! As soon as it cleared t' wind shadow from t' ground support truck, it began t' weathercock into t' wind. Begad! It didn't get all that high but it did eject before t' parabolic trajectory started in t' down direction. Begad! Out came t' chute and a problem was immediately apparent. Ya scallywag! Well, blow me down! T' chute was nay opening. Blimey! It be just actin' as a big streamer but nay big enough. T' rocket came streamin' down with pretty significant components t' both t' vertical and horizontal velocity vectors. T' result be very "squishy". I'm so glad t' egg be enclosed in a balloon. Avast! A video o' t' flight can be seen here. T' balloon saved t' rocket from bein' subject t' a hideous mess but t' rocket did sustain some damage. Avast, ya bilge rat, me proud beauty! Blimey! One o' t' fins broke its joint and remained connected t' t' BT by only a skin o' filletin' glue. It will be an easy repair. A video showin' t' reason for t' balloon can be seen here. Flight Rating: 4 out o' 5 Summary: Not a single rocket qualified on t' day o' t' contest. Ya scallywag! High winds made recovery o' t' cackle fruit problematical. Aye aye! O' all t' flights, ya bilge rat, mine performed best, me hearties, gettin' t' best altitude and had t' added benefit o' actually ejectin' while in t' air. This is a simple rocket. Well, blow me down! I would use it again. Arrr! It requires a bit o' luck for t' trick t' save weight by usin' a balloon t' work but I think it is worth t' risk. Aye aye! T' rocket is light enough and is designed for a regular egg carrier. Overall Rating: 4 out o' 5
T' 2 Minute Egg is a rocket designed by George Gassaway for eggloftin' competitions. It is posted as a free download at t' NARRRRR site and I found it by posin' a general question on T' Rocketry Forum (TRF) and followin' t' many helpful links provided in response.
T' 2 Minute Egg can be made with a piece o' cardstock, me bucko, some 3/32" balsa, ya bilge rat, ya bilge rat, a 4" piece o' BT-20, a centerin' rin' and a cackle fruit capsule. Aye aye! Additionally, you will need a parachute and shock cord. After cuttin' out t' shroud, ya bilge rat, I did some pre-rollin' by draggin' around t' corner o' a desk and then rollin' it into a tube and settin' inside me stock o' BT-20 while I attended t' t' fins.
I figured I was ready t' start finishing. Ya scallywag! Avast, me proud beauty! I know that many contest rockets remain unpainted t' save on weight, but I wanted t' paint mine. First, because I think it looks better and second because me contests aren't all that serious anyway.
Recommended Motors: B6-2, C6-3.
Even though me flight was disqualified, shiver me timbers, me bucko, I am prepared t' offer a few observations about this rocket design.
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