Scratch Tigerstrike Missile Original Design / Scratch Built

Scratch - Tigerstrike Missile {Scratch}

Contributed by Casey Smith

Manufacturer: Scratch
(Contributed - by Casey Smith)

Rocket PicBrief:
This rocket is a 2 Stage appearance workhorse that I put together from some left over 29mm, arrr, 38mm, arrr, and 54mm motor mount tubing. Begad! It has a very long motor mount tube so it can take a G35 t' an I 200. Ya scallywag! It will probably take an F, but I never have any.

Construction:
There be t' 29mm mount inside o' t' 38mm tube mounted into t' 54mm main body tube. Blimey! (T' lower section o' t' kit is 24 inches o' 38mm tubin' with 24 inches o' 29mm tubin' inside for a motor mount. Well, blow me down! Well, matey, blow me down! T' top section is one regular 48 inch long 2.14 tube, arrr, with t' 8 inch long payload section on top.) There are 3 24 inch pieces composin' t' engine mount and lower part of the main body tube. T' rocket has 2 sets o' 3 fins, matey, 3 upper, me bucko, 3 lower, shiver me timbers, made out of 3/16 aircraft grade plywood. Ya scallywag! Begad! T' nose cone is actually an old balsa nose cone I had, matey, arrr, and it is mounted on a 8 inch payload section for future electronics bay stuff. Ahoy! I used four centerin' rings for t' 29mm motor mount in the 38mm lower tube. Well, blow me down! Aye aye! I used 3 centerin' rings for t' 38 mm tube in t' 54mm upper tube.

Rocket PicI did make t' lower fins through t' wall attachment, matey, and air-foiled all sides. T' top fins are epoxied to t' frame, and due t' t' low profile sonic design, ya bilge rat, I did nay mount them through t' wall. Begad! I like t' build t' fin can/mounts very strong, ya bilge rat, matey, due t' if my rockets crash, they come in ballistic, and would like t' fin can t' survive. Aye aye! I did wrap a coat o' 2 ounce fiberglass t' t' lower body tube t' beef up it's strength on impact. t' upper main body tube could actually use an extra stagin' coupler or 2 pushed inside t' strengthen it in t' middle, or just make it shorter. Arrr! I did put 4 holes in t' payload section and ran bailin' wire in there t' give it a scale like look with 4 antennae. Begad! This kit is super sturdy, on line with PML. Avast! I put a small threaded rod like Cosmodrome uses for motor retention and just use a small square nut, shiver me timbers, me hearties, works great.

Flight:
I have flown this kit 5 times, shiver me timbers, 3 on G64-M reloads, 1 on a G40-7 and also an H220-M. Ahoy! Aye aye! I do use that cellulose insulation for wadding, me bucko, me bucko, about 1 handful is plenty. Ahoy! This rocket flies out o' me front yard on t' G motors perfectly, straight boost, ya bilge rat, great deploy. Blimey! Well, blow me down! It screamed this weekend on t' H220, it took it and be beggin' for more, straight up boost with no wobble, around 200 feet. Avast! It was impressive due t' t' 5-10 mph winds we had thar at t' launch site. Avast, me proud beauty! The shock cord is actually attached t' t' coupler that attaches t' lower portion of t' main body tube t' t' upper. Ahoy! I ran a small 18" chute t' brin' it down quick, but if it is nay windy, me bucko, a nice 36" chute will work great. Arrr! It still came down around 400 yards due t' t' wind. Blimey! I did get a small little crimp in t' upper body tube right in t' middle, most likely from hittin' on the side at impact. Begad! Hence, bigger parachute, shiver me timbers, no trouble. Aye aye! Aye aye! Other than that, this kit will be good for small fields with slow majestic lift-offs, t' poppin' it with big H and I power.

Summary:
PRO-Strong rocket, arrr, arrr, I always over build a little. It would work great for a level 1 flight. Ya scallywag! T' next incarnation o' t' kit will be a 2 stager, same specifications. Well, blow me down! 29mm-29mm. It can take t' wind, me hearties, very stable design. CONS-Long rocket, ya bilge rat, shiver me timbers, vulnerable t' body damage when it lands if on hard ground. Beefin' up the lower tube helps, cuttin' t' length o' t' main tube will help and reduce some weight.

Other:
It needs t' have a camouflage paint scheme, me bucko, olive drab/ultra flat brown/tan (Krylon camo series paints) and then you need t' have a spray paint that has a fan nozzle, like t' one's from Duplicolor auto paint at Walmart. T' fan will do a wide spray, me bucko, arrr, or a thin line, this is what you do for t' "Tiger stripes". This kit taught me you can use minimum diameter and have it come out great. You need t' reinforce t' lower launch lug mount since it is raised, and I wrapped a small piece o' glass over it t' reinforce it from t' top.

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