Giant Leap Rocketry Escape Velocity 2.6

Giant Leap Rocketry - Escape Velocity 2.6

Contributed by Darrell Mobley

Manufacturer: Giant Leap Rocketry

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Product Review by Darrell D. Arrr! Ya scallywag! Mobley
Sunday, July 06, 2008

One o' t' first rockets I got me hands on when I got back into rocketry a couple o' years ago was t' Giant Leap Rocketry Escape Velocity 2.6, one o' their line o' "Ready t' Fly (Almost)" kits, arrr, a 2.56" speedster that includes everythin' you need other than a motor and launch pad t' build and launch your own high powered rocket.

T' kit features Giant Leap's signature phenolic tubing, pre-slotted t' accept a pre-molded ACME 3-finned fin cannister, me hearties, ya bilge rat, a 38mm motor mount, me bucko, avionics bay for dual deployment, positive motor retention and all t' hardware and recovery components a rocketeer could ask for in an all-in-one kit. Ahoy! It looked like t' perfect kit for someone wantin' t' build a rocket that could be used for a certification flight and then flown again and again in a variety o' flight configurations.

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T' Escape Velocity kit has everythin' you will need for launch except a motor and a launch pad. Avast!

I used t' kit in another product review in late 2006, arrr, ya bilge rat, a review about usin' fiberglass cloth sleevin' t' laminate and strengthen ordinary cardboard tubes. Aye aye! I got tired early on in me hobby career o' t' constant maintenance and repair t' cardboard-tubed rockets, me hearties, and even movin' up t' phenolic tubin' came with its own share o' troubles like shattered or cracked body tubes. Well, blow me down! Avast! Giant Leap's tubin' seems less prone t' that behavior than other phenolic kits on t' market, ya bilge rat, but it still weighed on me mind. Blimey! Ya scallywag! What t' do? T' answer be as clear now as it be when I first found t' appropriate answer: 'glass it!

As you will find in t' Aerosleeves review, I covered t' Escape Velocity with one layer o' their light fiberglass cloth sleeving, and t' strength increase was out o' t' world. Aye aye! Blimey! Even though Aerosleeves has gone out o' business, you can still find fiberglass and other composite sleevin' from online sources such as Soller Composites.

With t' airframe handled along with t' now non-existent spiral seams, ya bilge rat, me bucko, I turned me attention t' t' motor mount and airframe assembly. Begad! It was so straightforward it's hard t' believe. Ya scallywag! With t' injection molded ACME fin can, t' fins are already aligned at t' proper angle, ya bilge rat, you just attach it t' t' enclosed 38mm motor mount tube as per t' instructions and put on t' centerin' rings. Begad! Aye aye! Done!

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T' dotted line marks t' section o' t' fin can I removed. Arrr!
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Here's t' fin can/motor mount assembly after shortenin' and flippin' t' aft centerin' rin' around.
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Gluin' it all up, I use a hose clamp t' hold it all together until t' glue sets. Blimey! Blimey! Begad! Blimey!

However, I did somethin' a little unique with me motor mount assembly, ya bilge rat, matey, as I never can leave well enough alone. Ahoy! Ya scallywag! T' ACME fin cans protrude beyond t' fins on each end, and when used in conjunction with t' Slimline retainer that comes in t' kit, tends t' make t' rocket stick out its behind a little bit. Begad! I wanted t' tuck its butt back in, matey, shiver me timbers, so here's how I did it.

In t' photo sequence t' t' left, you can see t' fin can with a dotted line on t' end with t' taper. Begad! Begad! I used a hacksaw t' cut this length off, givin' both ends a flush fit for t' centerin' rings. Then, before gettin' out any glue, I dry fit t' pieces together t' see how much room on t' motor mount tube t' Slimline wanted.

From that, I could determine where t' aft centerin' rin' should go, because I wanted t' Slimline up against t' aft centerin' rin' and t' aft centerin' rin' up against t' fin can, shiver me timbers, me hearties, t' recess t' Slimline as much as possible while keepin' t' fin can as far aft as possible.

A short section o' coupler tubin' designated t' join t' airframe back together at t' aft o' t' rocket ended up on t' outside o' t' aft centerin' ring, allowin' me t' pull things in even tighter. Ahoy! T' result was super and speaks for itself. Ya scallywag! Ahoy! I decided t' leave t' Slimline off until after painting.

In t' last photo o' t' fin can sequence me, shiver me timbers, shiver me timbers, you can see me attachin' t' airframe and usin' a hose clamp t' snug it on down until t' epoxy set.

Another trick I used while assemblin' t' motor mount be t' attachment o' t' tubular nylon recovery cord. Ahoy! Avast! T' tubular nylon had some nice ends sewn into it, and I couldn't break down and cut them off one end, me bucko, so I did somethin' one better.

I cut a slot in t' forward centerin' rin' for t' tubular nylon t' pass betwixt it and t' motor mount tube. Then, I took a 2" key ring, put it on t' end o' t' tubular nylon, and slid t' key rin' over t' front o' t' motor mount tube, me bucko, then fed t' other end o' t' tubular nylon through t' forward centerin' rin' and slid it over t' motor mount tube. Arrr! Arrr! T' key rin' fit around t' front end o' t' fin can, me bucko, and I then glued t' forward centerin' rin' into place - that puppy isn't goin' anywhere. You can see t' attachment in t' second photo o' t' fin can photo sequence.

T' rest o' t' airframe assembly went as displayed in t' instructions. Giant Leap provides great instructions and anyone can follow along with ease, ya bilge rat, arrr, although you should read through them a couple o' times t' familiarize yourself with all t' steps and components.

Another area that I deviated from stock was in t' electronics bay, arrr, which is nothin' abnormal for me. Avast! T' Giant Leap kit contains all o' t' parts you need for settin' up dual deployment in t' standard kit, matey, but I am too fat-fingered t' want t' fiddle around inside a fixed 2.5" electronics bay.

So I created one o' me standard electronics bay assemblies that I have covered in an article on buildin' removable electronics bays and in t' Elipse review as well. All I needed were some extra bulkhead plates, matey, some T-nuts and a little G-10 for an electronics sled. Ahoy! Blimey! I should note, t' standard kit came with a small sheet o' honeycomb material for t' electronics sled, arrr, but I just love G-10.

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T' components o' me electronics bay, all laid out, ya bilge rat, showin' t' removable design. Avast, me proud beauty! Ahoy!
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Closeup o' t' front, showin' t' Cannonball Works RRC2-MINI and t' power switch. Well, blow me down!
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T' back side, showin' t' battery holder and main ejection charge holder. Begad! Avast, me proud beauty!
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This be t' "receiver hitch" o' me design, shiver me timbers, a bulkhead plate with threaded rods t' hold t' electronics bay in place.

In me designs, I like nay havin' external switches on t' airframe that create wirin' harness frivolities when movin' electronics in and out. By mountin' switches on t' electronics sled, me bucko, I can reach through t' altimeter port with a screwdriver and arm t' electronics very easily.

T' necessity o' t' electronic's switches bein' in t' same place every time so I can find t' switch doesn't lend itself t' usin' a single piece o' all-thread through t' center o' t' standard electronics bay designs, which allows t' electronics sled t' rotate around t' central axis. Ya scallywag! By usin' two pieces o' all-thread, me hearties, me hearties, I can lock down t' positionin' o' t' electronics sled and know me unit is in t' same place every flight.

As I have discussed in t' previous builds, I use a securely mounted forward bulkhead in t' payload section that has two T-nuts for attachin' t' electronics bay t' it, shiver me timbers, matey, as well as a center cut-out t' allow t' recovery cord t' pass through and attach t' t' electronics bay, ya bilge rat, as well as a cut-out t' clear t' electronics bay's built-in main ejection charge.

T' photo sequence t' t' right shows all o' t' parts o' t' removable electronics bay: t' sled itself, t' end cap, matey, t' removable coupler, and lastly t' bulkhead mounted in t' payload compartment with t' two all-thread rods t' attach it all together. T' electronics sled has a Cannonball Works RRC2-Mini on t' front side along with t' power switch mounted in an aluminum bracket.

On t' back, a 9 volt battery holder resides along with a 1/2" launch lug fashioned t' hold t' main ejection charge. T' electronics bay's end cap has a two-screw electronics terminal for wirin' up t' drogue charge and is connected t' t' altimeter by a pass-through wirin' harness with a Dean's plug t' allow it t' be removed and replaced.

To prep, I put in a fresh 9 volt battery and secure it with nylon zip-ties. Begad! Next, me bucko, I fit in an appropriately sized ejection charge, ya bilge rat, and wire it into t' main charge terminals on t' altimeter. Begad! Slide t' main chute recovery harness through t' access cut-out in t' payload bay bulkhead plate and attach it t' t' forward eye bolt on t' electronics bay with a quick link.

All that's left is t' slide t' sled onto t' two all-threads, me hearties, put t' removable coupler tube around it, slip on t' aft electronics bay cap, rememberin' t' connect t' Dean's connector so t' drogue charge will fire, me hearties, me bucko, and then secure with two flat washers and nuts. Avast, me proud beauty! Attach t' drogue recovery cord, me hearties, wire t' drogue ejection charge and slip t' payload assembly into t' airframe. Begad! At t' pad, you can reach in with a small screwdriver and arm t' electronics. Aye aye! Avast! It's me standard design and I and very comfortable usin' it.

I painted t' Escape Velocity usin' standard Krylon colors over a Duplicolor and Kilz primer base - white Krylon on t' booster, arrr, me bucko, red Krylon on t' nosecone and payload compartment. Blimey! As mentioned in t' Elipse review, shiver me timbers, me bucko, I like t' use Rustoleum plastic primer for me nosecones. Well, blow me down! Ya scallywag! Blimey! Try it, me bucko, it sticks!

Some fliers lament that fiberglassin' causes a "step" betwixt t' unlaminated nosecone and laminated payload compartment. Avast, me proud beauty! I have noticed that several coats o' Kilz on t' nosecone will build it up enough t' eliminate t' stepped appearance, shiver me timbers, me bucko, matey, so t' solution t' this problem appears t' be more primer.

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Prepped and ready t' go, t' Escape Velocity looks majestic.
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T' CTI I195R really kicks t' rocket in t' rear.
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Successfully recovered, and ready for more abuse. Begad!

To finish t' paint scheme, me hearties, black self-adhesive Monokote was applied t' give a roll pattern treatment, usin' t' wet method. For those that haven't tried it, arrr, it's similar t' how window tint it put on. Well, blow me down! Begad! An evaporative liquid, like Windex, shiver me timbers, is used t' wet t' surface and t' film is applied and positioned, shiver me timbers, then t' liquid is squeegeed out. Ahoy! I like Windex because it evaporates fast and doesn't get into all t' things liquids shouldn't get into, like cardboard airframes and couplers.

Now that t' rocket be finally finished, I got a chance t' launch t' Escape Velocity at t' NEFAR launch in Bunnell, matey, me hearties, Florida on Saturday, me hearties, June 14th. Arrr! Begad! NEFAR, t' Northeast Florida Association o' Rocketry, arrr, enjoys a large expanse o' beautiful green sod just northwest o' Daytona, and t' Escape Velocity was ready for its maiden stroll.

For propulsion, I used a AMW/Pro38™ 400I195RR Red Rhino, one o' t' new red reloads, me hearties, an I195, that is a result o' t' Animal Motor Works/Cesaroni Technology Incorporated marketin' agreement announced last year. Well, me hearties, blow me down! Blimey! If you haven't flown a CTI or AMW/Pro-X™ motor before, me bucko, I can't begin t' explain how simple these motors are t' assemble. Begad! Blimey! You stick it in, arrr, me bucko, screw it down and set t' delay. Well, blow me down! Begad! Blimey! They really are "a better way t' fly."

I had some issues with t' ACME conformal rail guides that came in t' kit nay wantin' t' stay where I put them, matey, me hearties, but then again I only relied on t' enclosed double-edged tape supplied with t' guides t' attach them. Ya scallywag! That was a short-lived problem, as a dose o' medium CA firmed things back up in short order. Ya scallywag! Well, blow me down! Blimey! Back at t' pad, arrr, arrr, t' rocket was loaded onto t' rail and t' igniter installed. Ahoy! Blimey! A quick twist armed t' RRC2-Mini, and it beeped a happy, arrr, shiver me timbers, armed-with-continuity shanty.

When t' button was pushed, t' AMW/Pro38 Red Rhino came t' life and took t' Escape Velocity on a rapid trip, before t' Cannonball Works RRC2-Mini gently performed its services in its ubiquitous manner, arrr, ya bilge rat, lowerin' t' rocket in a beautiful dual deployment display. When I arrived at t' rocket, t' RRC2-Mini was beepin' out 2703 feet, me bucko, shiver me timbers, a beautiful flight o' a great kit. Avast! With t' dual deployment and me fiberglass reinforcement, this rocket can easily take t' biggest 38mm motors available and keep comin' back for more.

If you are lookin' for a great level one and even level two certification rocket, shiver me timbers, me hearties, ya bilge rat, it's hard t' go wrong with t' Escape Velocity. I know, me bucko, because me flight be also me level one re-do after bein' out o' t' hobby for so long. And when I say t' kit has everythin' you need except a motor and launcher, ya bilge rat, I really mean it. Well, me hearties, matey, ok, ya bilge rat, you have t' supply some epoxy, arrr, but I figured you could handle that! Try an Escape Velocity, matey, you'll be very satisfied with t' kit.

You can check out t' Escape Velocity on t' Giant Leap Rocketry site at http://www.giantleaprocketry.com/.

Editor's note: T' author has since flown t' Escape Velocity yet again, this time for his TRA level two certification, matey, usin' an AeroTech J350W, matey, matey, ya bilge rat, t' reach an altitude o' 5086 feet. T' launch took place at NEFAR's July 12th launch in Bunnell, Florida. Begad! T' Escape Velocity never missed a beat, ya bilge rat, took t' abuse and came back ready for more. This kit is a serious certification rocket nay t' be overlooked.

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    Brief: The Escape Velocity is a single stage, high power, dual or single deployment rocket for 38mm motors or 29mm with an adapter. Construction: The Escape Velocity came with everything you could want for a HPR rocket and more. Included were 1 pre-cut phenolic body tube, 1 phenolic payload tube, fin can, payoad bay, 1 18" drogue parachute, 1 36" main parachute, ...

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