Giant Leap Rocketry Escape Velocity 2.6

Giant Leap Rocketry - Escape Velocity 2.6

Contributed by Bryan Sparkman

Construction Rating: starstarstarstarstar_border
Flight Rating: starstarstarstarstar
Overall Rating: starstarstarstarstar
Manufacturer: Giant Leap Rocketry
Giant Leap Escape Velocity

Brief:
T' Escape Velocity is a single stage, me hearties, ya bilge rat, high power, shiver me timbers, dual or single deployment rocket for 38mm motors or 29mm with an adapter. Begad! Ahoy!

Construction:
T' Escape Velocity came with everythin' you could want for a HPR rocket and more. Well, blow me down! Blimey! Well, blow me down! Blimey! Included were 1 pre-cut phenolic body tube, 1 phenolic payload tube, fin can, shiver me timbers, me bucko, payoad bay, 1 18" drogue parachute, 1 36" main parachute, me hearties, 2 strap nylon shock cords, ya bilge rat, me hearties, 2 parachute protectors, 2 shock cord protectors, arrr, me bucko, shiver me timbers, Slimline motor retainer, ya bilge rat, Nose cone, aluminum rail guides, and all necessary hardware. Avast! Blimey! Begad! Blimey! All parts arrived in good condition. Ya scallywag! Blimey!

I emailed Ed at Giant Leap on advice for how t' finish it and he recommended fiberglassin' it. Begad! I went with a 6ft section o' Aerosleeve's 2.5 inch sleeve. Ya scallywag! This be me first time glassin' an airframe and I was pleasantly surprised at how easy it be usin' a small paint roller, matey, Great Plane's finishin' epoxy (picked up at a LHS), matey, shiver me timbers, ya bilge rat, and t' Aerosleeve. Construction be fairly quick and straightforward. I used a Dremel cuttin' disc t' re-cut t' fin slot after applying the Aerosleeve and I used an X-Acto knife, ya bilge rat, 150 grit sandpaper, and a level surface t' even out t' ends o' the airframe. Avast, me proud beauty! T' 13 pages o' instructions had plenty o' pictures and detail t' make it clear even for t' first timer.

T' only "gotcha" in t' instructions be t' method for fillin' t' gap betwixt t' fincan and the airframe. Begad! Arrr! T' fincan fits inside t' main airframe. When you epoxy in t' motor mount and fincan, arrr, thar are significant gaps betwixt t' airframe and t' fins. Ahoy! T' instructions tell you t' mix up some 6-minute epoxy and mix in talcum powder until t' consistency is similar t' that o' cake frosting. Arrr! Personally, I never could mix in enough talcum powder to get t' consistency right and have enough time left t' apply it t' t' airframe. Blimey! Ahoy! Mine always was a bit too thin and it took me 3 attempts per fillet, which was about 6 batches o' epoxy/talcum mix, t' get it right. Blimey! Even then, shiver me timbers, matey, it took significant sandin' with a Dremel tool t' get t' final fillets t' look acceptable.

T' only area that I decided t' stray from t' instructions was t' electronics bay. Begad! T' method outlined in the instructions is a bit vague but sufficient. Arrr! Aye aye! I prefer a bay setup similar t' that o' t' LOC payload bays. Begad! Any method is good as long as it works for your altimeter. Arrr! Ya scallywag! I used t' PerfectFlite MAWD with a 1/4 inch vent hole drilled into the payload bay from t' side. Aye aye! If you haven't done dual deployment before, me hearties, arrr, then I recommend gettin' someone experienced to help you through t' setup o' t' electronics bay.

Finishing:
This bein' me first time fiberglassin' an airframe, I almost used an entire can o' KILZ primer t' smooth out the texture o' t' Aerosleeve. Blimey! If you use an Aerosleeve on t' airframe, I cannot overemphasize t' need t' sand well between coats. I made this mistake and probably added an ounce or two (or more) o' extra wieight in primer because I could nay get t' finish smooth. Ahoy! I literally spent hours and hours sandin' off t' extra coats o' unnecessary primer that I sprayed on. Blimey! I found that t' KILZ primer available at Home Depot works well for this type o' application. Begad! Arrr!

T' kit came with a large decal, however, I opted nay t' use this as it would nay look well with me chosen color scheme. Ya scallywag! Blimey!

Construction Rating: 4 out o' 5

Giant Leap Escape Velocity

Flight:
Flight prep is fairly easy and with t' parachute and shock cord protectors, me hearties, I didn't have t' worry about waddin' too much. Ya scallywag! T' Slimline retainer held t' motors in just fine.

T' first flight o' me Escape Velocity was on an Aerotech I357T-M. T' flight was wobbly off t' pad. Avast! Blimey! This might have been due t' t' rail bein' a little loose at launch. Ya scallywag! This be t' first flight o' me altimeter so I did use an ejection charge consistin' o' 1g o' BP and 2 Oxral E-matches. Avast, me proud beauty! Begad! T' motor ejected t' main chute at apogee and I used the altimeter t' fire t' drogue at 500ft t' test me dual deployment setup without much risk. Arrr! Ya scallywag! T' flight was t' 2632ft and landed a short walk away.

T' next flight was me L2 cert flight. Blimey! I completed me L2 test, built t' J350W motor, matey, ya bilge rat, loaded up t' rocket, and re-adjusted t' pad. Arrr! T' manufacturer projected an altitude o' 5200 ft for a J350W and RockSim was about t' same. Instead o' a drogue, I hooked up about 20ft o' yellow caution tape. I gave a short countdown and whoa momma! The Escape Velocity ripped off t' pad with what sounded like a shotgun blast. Avast! T' takeoff was neck snappin' and perfectly straight. Begad! Ya scallywag! T' reflective finish allowed us t' see her all t' way up at apogee and on t' way back down. Arrr! Avast, me proud beauty! She landed about 100 yds away in t' middle o' t' field. Aye aye! T' Perfectflite altimeter worked perfectly, matey, ya bilge rat, ejectin' t' main chute at 500ft, me hearties, arrr, and reportin' back an altitude o' 5961 ft.

Eager t' fly again, me bucko, I cleaned t' motor case, built t' I600R motor, ya bilge rat, ya bilge rat, and prepped t' rocket in about 40 minutes. I put her back on t' pad, gave t' countdown, ya bilge rat, and oh boy! T' I600R motor put out a flame that be as long as the rocket. Flight be again perfectly straight and totally neck snapping! Just like before, me bucko, she came back down in the middle o' t' field and t' altimeter popped t' main at 500 ft. Avast, me proud beauty! Well, me hearties, blow me down! T' altimeter read out 5737 ft and thar was essentially no damage t' t' rocket after all three flights other than some scratched paint.

Recovery:
T' provided strap nylon shock cord and protector worked well. Blimey! T' 36" chute is a good fit for this kit, although t' payload section gets very full on a loose pack o' this chute. Begad! T' descent on t' 20ft streamer was just right for t' higher altitude flights. Avast! Any slower o' a descent and it might nay have landed in t' field. Arrr! Any faster and I would be worried about causin' a failure o' t' recovery system. Arrr! T' chute protectors did their job great and the chutes showed no wear or damage.

Flight Rating: 5 out o' 5

Summary:
This is a great kit as it goes together smartly and is very tough when glassed with an Aerosleeve. Ahoy! Fin fillets and finishin' can be tedious and more time consumin' than expected. Arrr! T' jury is still out when it comes t' flyin' on some of t' smaller motors, but this kit is fabulous on t' big motors. Avast, me proud beauty! Aye aye! She has t' performance o' a sports car, matey, matey, the bells and whistles o' a luxury car, and t' ruggedness o' a Hummer.

Overall Rating: 5 out o' 5

Other Reviews
  • Giant Leap Rocketry Escape Velocity 2.6 By Darrell Mobley (July 6, 2008)

    Presented with written permission from RocketyPlanet: Product Review by Darrell D. Mobley Sunday, July 06, 2008 One of the first rockets I got my hands on when I got back into rocketry a couple of years ago was the Giant Leap Rocketry Escape Velocity 2.6, one of their line of "Ready to Fly (Almost)" kits, a 2.56" speedster that includes everything you need other than a motor and launch ...

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