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, matey, high power, arrr, me bucko, ya bilge rat, dual or single deployment rocket for 38mm motors or 29mm with an adapter. Begad! Well, blow me down!

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

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

T' only "gotcha" in t' instructions was t' method for fillin' t' gap betwixt t' fincan and the airframe. Well, blow me down! Blimey! Blimey! Blimey! T' fincan fits inside t' main airframe. Ya scallywag! Blimey! When you epoxy in t' motor mount and fincan, arrr, thar are significant gaps betwixt t' airframe and t' fins. Ahoy! Blimey! 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. Avast! Blimey! Avast! Blimey! Personally, me bucko, 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 was a bit too thin and it took me 3 attempts per fillet, arrr, which was about 6 batches o' epoxy/talcum mix, t' get it right. Well, blow me down! Blimey! Even then, 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. Aye aye! T' method outlined in the instructions is a bit vague but sufficient. Aye aye! I prefer a bay setup similar t' that o' t' LOC payload bays. Aye aye! Any method is good as long as it works for your altimeter. Blimey! Aye aye! I used t' PerfectFlite MAWD with a 1/4 inch vent hole drilled into the payload bay from t' side. Begad! If you haven't done dual deployment before, me bucko, 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, ya bilge rat, I almost used an entire can o' KILZ primer t' smooth out the texture o' t' Aerosleeve. Arrr! If you use an Aerosleeve on t' airframe, me bucko, I cannot overemphasize t' need t' sand well between coats. Avast, me hearties, me proud beauty! 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. Begad! I literally spent hours and hours sandin' off t' extra coats o' unnecessary primer that I sprayed on. Aye aye! I found that t' KILZ primer available at Home Depot works well for this type o' application. Avast, me proud beauty! Avast!

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

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. Begad! T' flight be wobbly off t' pad. Avast! This might have been due t' t' rail bein' a little loose at launch. Avast, me proud beauty! 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. 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. Begad! Aye aye! T' flight be t' 2632ft and landed a short walk away.

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

Eager t' fly again, shiver me timbers, I cleaned t' motor case, built t' I600R motor, shiver me timbers, me bucko, and prepped t' rocket in about 40 minutes. I put her back on t' pad, ya bilge rat, ya bilge rat, gave t' countdown, and oh boy! T' I600R motor put out a flame that was as long as the rocket. Arrr! Avast! Flight was again perfectly straight and totally neck snapping! Just like before, she came back down in the middle o' t' field and t' altimeter popped t' main at 500 ft. Arrr! 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. Aye aye! 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. Begad! Avast, me proud beauty! Any faster and I would be worried about causin' a failure o' t' recovery system. Avast, arrr, 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, but this kit is fabulous on t' big motors. Ya scallywag! She has t' performance o' a sports car, ya bilge rat, 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

comment Post a Comment