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, ya bilge rat, high power, dual or single deployment rocket for 38mm motors or 29mm with an adapter. Aye aye! Ya scallywag!

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

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

T' only "gotcha" in t' instructions be t' method for fillin' t' gap betwixt t' fincan and the airframe. Avast! T' fincan fits inside t' main airframe. Blimey! Avast! When you epoxy in t' motor mount and fincan, matey, thar are significant gaps betwixt t' airframe and t' fins. Ya scallywag! 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! Ya scallywag! Personally, ya bilge rat, matey, ya bilge rat, I never could mix in enough talcum powder to get t' consistency right and have enough time left t' apply it t' t' airframe. Mine always be a bit too thin and it took me 3 attempts per fillet, which was about 6 batches o' epoxy/talcum mix, ya bilge rat, t' get it right. Well, blow me down! Even then, 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 be t' electronics bay. T' method outlined in the instructions is a bit vague but sufficient. Avast, me proud beauty! Begad! I prefer a bay setup similar t' that o' t' LOC payload bays. Ahoy! Any method is good as long as it works for your altimeter. Ya scallywag! Blimey! I used t' PerfectFlite MAWD with a 1/4 inch vent hole drilled into the payload bay from t' side. Well, blow me down! Ahoy! If you haven't done dual deployment before, 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, shiver me timbers, I almost used an entire can o' KILZ primer t' smooth out the texture o' t' Aerosleeve. Arrr! Ya scallywag! If you use an Aerosleeve on t' airframe, arrr, 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. I literally spent hours and hours sandin' off t' extra coats o' unnecessary primer that I sprayed on. Avast, me proud beauty! I found that t' KILZ primer available at Home Depot works well for this type o' application. Well, blow me down!

T' kit came with a large decal, shiver me timbers, however, I opted nay t' use this as it would nay look well with me chosen color scheme. Well, blow me down! Ahoy!

Construction Rating: 4 out o' 5

Giant Leap Escape Velocity

Flight:
Flight prep is fairly easy and with t' parachute and shock cord protectors, I didn't have t' worry about waddin' too much. 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. This might have been due t' t' rail bein' a little loose at launch. Begad! This was t' first flight o' me altimeter so I did use an ejection charge consistin' o' 1g o' BP and 2 Oxral E-matches. Arrr! 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. Well, blow me down! T' flight was t' 2632ft and landed a short walk away.

T' next flight was me L2 cert flight. Arrr! Blimey! I completed me L2 test, matey, built t' J350W motor, shiver me timbers, loaded up t' rocket, shiver me timbers, and re-adjusted t' pad. Avast, me proud beauty! Blimey! 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. Blimey! Aye aye! I gave a short countdown and whoa momma! The Escape Velocity ripped off t' pad with what sounded like a shotgun blast. T' takeoff be neck snappin' and perfectly straight. Arrr! Arrr! T' reflective finish allowed us t' see her all t' way up at apogee and on t' way back down. Well, blow me down! She landed about 100 yds away in t' middle o' t' field. Well, blow me down! T' Perfectflite altimeter worked perfectly, ya bilge rat, me bucko, ejectin' t' main chute at 500ft, shiver me timbers, and reportin' back an altitude o' 5961 ft.

Eager t' fly again, me bucko, shiver me timbers, shiver me timbers, I cleaned t' motor case, ya bilge rat, built t' I600R motor, arrr, arrr, and prepped t' rocket in about 40 minutes. I put her back on t' pad, gave t' countdown, me hearties, and oh boy! T' I600R motor put out a flame that was as long as the rocket. Aye aye! Blimey! Flight be again perfectly straight and totally neck snapping! Blimey! Just like before, she came back down in the middle o' t' field and t' altimeter popped t' main at 500 ft. Well, blow me down! Blimey! Ya scallywag! Blimey! 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. Arrr! T' 36" chute is a good fit for this kit, although t' payload section gets very full on a loose pack o' this chute. Aye aye! T' descent on t' 20ft streamer was just right for t' higher altitude flights. Any slower o' a descent and it might nay have landed in t' field. Ya scallywag! Any faster and I would be worried about causin' a failure o' t' recovery system. Avast, me proud beauty! 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. Fin fillets and finishin' can be tedious and more time consumin' than expected. Well, blow me down! T' jury is still out when it comes t' flyin' on some of t' smaller motors, me hearties, but this kit is fabulous on t' big motors. Blimey! She has t' performance o' a sports car, 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 ...

Flights

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