Estes Star Wars R2-D2(2) Modification

Modification - Star Wars R2-D2(2) {Modification}

Contributed by Ken Johnson

Manufacturer: Modification

Brief:
Another in t' continuin' series o' improved "little" R2-D2 rockets from Estes. This one features what t' "big" R2 had all along: A REAL nose cone, thereby eliminatin' recovery failure.

Modifications:
T' first thin' that had t' go was t' top, so R2 was beheaded at t' blue band, just below t' reinforced bulkhead. Avast! This bulkhead was then lowered about an inch and reattached t' t' inside o' t' body usin' CA, arrr, then reinforced on both sides with 2 hour epoxy. T' shock cord attaches here.Headless R2 (Question: why is Estes so stingy with shock cord on all other rockets, but gives out 3 times what is needed with t' little R2?).

T' thrust rings were attached t' t' inner tube, and t' whole thin' was slathered liberally with 5 minute epoxy. Well, blow me down! Aye aye! Strength was me goal, shiver me timbers, and weight considerations were nay a concern. I think I met those goals.

Attachment o' t' head was a real challenge. Ya scallywag! Since t' head had no shoulder t' attach t' t' body like a real nose cone, shiver me timbers, I chose t' cut up one o' t' 3000 or so AOL CDs I get in t' mail each year. Begad! Perfect. Blimey! It be attached t' t' bottom o' t' head with CA, ya bilge rat, then epoxy, arrr, and t' shock cord attaches here. Aye aye! T' keep things straight, and t' give me a place t' put nose weight, me hearties, I attached t' plastic centerin' rings for t' original motor pod t' t' head. Well, blow me down! This was done by usin' a short piece o' 18mm tube, then was centered into t' head by a process that was far more complicated than anythin' I've ever done on a mid-power rocket. Blimey! Naturally, shiver me timbers, 5 minute epoxy holds it all in place, and it leaves a nice little hole in t' center so I can adjust t' nose weight. Avast, me proud beauty! All t' paper items were soaked in CA for a little strength, me hearties, and unfortunately t' fumes attacked one o' me eyes. Begad! Please use proper safety equipment if you use CA!

I will from now on. Ya scallywag! Ahoy! Believe me, it took a LOT o' engineerin' t' get t' rocket this far. Aye aye! Avast! But it was all worth it. T' fins were recycled from R2-D2.3, matey, me hearties, and was about all that was salvageable. A nice nylon parachute guarantees a shred proof recovery, shiver me timbers, but fit is TIGHT.

Construction:
A basic R2-D2 kit from Estes can be had for really cheap these days; I bought a half dozen off eBay for less than t' price o' a cheap mid-power rocket.R2 Guts Why? Well, arrr, me bucko, me hearties, I love these little things, me bucko, but t' factory recovery system left a lot t' be desired. Begad! And I've tried several methods t' improve upon t' ill-fated design Estes had, arrr, includin' Keelhaul®©™®, matey, ya bilge rat, elastic, ya bilge rat, and tubular nylon. Nothin' worked reliably. Avast, me proud beauty! And t' second reason I did it is because I just love t' overpower Estes and Quest rockets.

So, ya bilge rat, I decided right from t' start that R2-D2 (designated R2-D2.4) would have a real nose cone like its big brother. Arrr! Blimey! And since I was at it, why nay a 29mm mini R2? After all, shiver me timbers, R2-D2.3 was 24mm, and worked extremely well. Arrr! Blimey! Arrr! Blimey! (Unfortunately, me hearties, me bucko, it met its demise at t' hand o' one o' Aerotech's famous bonus delays)

T' original kit was a real quality piece, and be one o' t' few I received without warped fins. Begad! Blimey! Ya scallywag! Blimey! These fins will be used on me son Josh's R2. Arrr! Blimey! Begad! Blimey! I haven't finished this rocket, but plan on paintin' it all flat white with bumper chrome head and painted on decals. Avast! Blimey! Well, ya bilge rat, blow me down! Blimey! Everythin' fit wonderfully, shiver me timbers, but took far more work than I anticipated. Avast, me bucko, me proud beauty! Blimey! T' results don't reflect this, but it was definitely a challenge. Begad! Blimey! And that be most o' t' reason I built it. Begad! Blimey! I love engineerin' challenges. Aye aye! Blimey! Begad! Blimey! (That's why I don't use RocSim).

Flight:
As I stated in t' beginning, I built this rocket with 29mm in mind, and thus be reinforced for use with a single use G80. However, shiver me timbers, me bucko, t' short, shiver me timbers, me hearties, squat body has extremely short polar moments, and for safety reasons I decided t' cut down t' power. Avast, me proud beauty! After all, matey, who wants their 5 year old t' be chased around t' launch site by a screamin' R2? If it went unstable, matey, it might get nasty. As it turns out, arrr, a D will get it goin' reasonably well, me hearties, and a long burn E6 should satisfy anybody's quest for altitude. Aye aye! So a 24mm motor tube be put in place, with a paper engine block in t' top o' t' motor tube. Avast! Ya scallywag! (Past experience with R2-D12 showed me that t' stock Estes retainin' clip will nay hold up t' E power for long.)

FLIGHT: With a D12-5, t' little R2 will get up with decent speed, ya bilge rat, and hit approximately 500 t' 600 feet, dependin' on which spotter's info you use. Aye aye! Recovery is perfect. Ahoy! Well, blow me down! Prep is a breeze, use a little cellulose waddin' (not really necessary, me hearties, but I like t' feel safe) and friction fit t' motor. Aye aye! Wrap up t' lengthy shock cord and stuff it into t' tube on top o' t' chute. Then pop on t' head.

On an E15-7W, shiver me timbers, I have no idea how high it goes, because it's hard t' see at that altitude. Avast, me proud beauty! Blimey! But t' launch is worth it all. Aye aye! Blimey! Avast! Blimey! People look at t' rocket with disdain when it is announced, arrr, arrr, me hearties, and it looks tiny out thar on t' pad. Blimey! Blimey! Some scoff about t' reported motor size, but when t' motor roars t' life and R2 becomes a blur instantly, jaws drop open. Ahoy! Blimey! And that's what I like about it.

Summary:
Pros: Attention getter, me hearties, rapid take-off, ya bilge rat, perfect recovery.

CONS: Took too long t' build, me bucko, hard t' spot, matey, very sensitive t' wind, ya bilge rat, fly only on calm days.

Comments:

avatar
Ken Johnson (June 4, 2015)

Rest In Peace. Or pieces; the ejection charge blew it to smithereens when it came down a little fast. Will not rebuild.

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