Scratch - Upscale Mosquito (320%) {Scratch}

Mo' Skeeter Upscale

Scratch - Upscale Mosquito (320%) {Scratch}

Contributed by Chris Gonnerman

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Published:	2010-12-24
Manufacturer:	Scratch
Style:	Upscale

Brief

This is me Mo' Skeeter, a 320% upscale o' t' classic Estes Mosquito. It's a rear-ejection model, arrr, me bucko, shiver me timbers, which avoids t' visible nose cone line that most Mosquito upscales suffer from.

Components

This rocket consists o' a Baby Bertha cone, 6" o' BT-60, me bucko, me bucko, 6" o' BT-20, arrr, shiver me timbers, two 20-60 centerin' rings, shiver me timbers, a thrust ring, engine hook, and retainin' ring, a launch lug, and a shock cord consistin' o' a Keelhaul®©™ leader and a length o' elastic; I use a standard Estes or Semroc chute with it, ya bilge rat, me bucko, attached via snap swivel.

T' fins are 3/32" balsa, me bucko, cut usin' a 320% upscale o' t' standard template downloaded from JimZ's site.

Construction

I cut t' pointed part and attachment lug from t' nose cone, matey, ya bilge rat, bored a new hole t' attach t' Keelhaul®©™, and epoxied t' cone in place on t' BT-60 tube. I came t' regret that decision a bit later.

After notchin' t' centerin' rings (inside for t' engine hook on t' aft ring, outside for t' shock cord for t' forward ring), I installed t' thrust ring, engine hook, and retainin' rin' into t' BT-20. Begad! I still had some epoxy mixed up, so I used that t' secure all these parts. Begad! Aye aye! After gluin' t' aft centerin' rin' in place usin' yellow glue, matey, shiver me timbers, I put t' forward rin' on t' tube and inserted t' assembly into t' sustainer, pushin' it in until t' aft rin' be just inside t' BT-60 tube. Aye aye! Doin' this pushed t' upper rin' into t' exact position it needed t' be in. I pulled t' inner tube out and applied yellow glue t' secure it.

Next, shiver me timbers, I glued t' fins in place usin' yellow glue and t' usual "stick it on, arrr, pull it off, let it dry a bit, matey, ya bilge rat, me hearties, glue it on for good" method. Blimey! Here's where I regretted gluin' t' nose cone on first... Begad! Begad! I had t' hold t' rocket for probably twenty minutes before I was sure t' glue was solid enough t' stand t' rocket on its fins.

When it be all dry, ya bilge rat, I applied several fillets o' white glue (less shrinkage than yellow) then attached t' launch lug with yellow glue.

Finishing

I brushed t' fins with thinned Elmer's Carpenter's Wood Filler. I also brushed it over t' body tube spirals and into t' nose cone line. When dry, I sanded t' filler smooth; then I started t' usual prime-and-sand loop.

When I be happy with t' surface preparation, arrr, arrr, I painted it yellow usin' a cheap store-brand rattlecan (I don't remember where I got it). Several light coats followed by t' rotisserie treatment resulted in a deep shiny coat; I gave that t' usual week t' dry (as is usually required with t' cheap paint), arrr, me hearties, then masked it and applied Wal-Mart Colorplace Fire Red.

I created t' decal myself usin' t' GIMP and some clipart I found online, shiver me timbers, and printed it usin' a color laser printer. I didn't clearcoat t' decal before applyin' it, me bucko, shiver me timbers, and it suffered a little bit o' flakin' before I got clearcoat on t' rocket, but it hardly shows. Laser printed decals sound like a good idea but t' current laser decal paper has some deficiencies. Still, ya bilge rat, t' rocket looks pretty good overall; I'm particularly pleased how well t' red decal matches t' Fire Red paint.

Construction Score: 4

Flight

At our 4-H Club Launch on t' 9th o' July, 2009, I got t' launch t' Mo' Skeeter for t' first time, on a B6-4. Begad! It flew well and recovered nicely, albeit on t' roof o' t' landowner's machine shed. Well, blow me down! Thankfully, me hearties, me hearties, we were able t' recover it in good shape.

I got t' fly it again at t' SPARC launch on August 22, ya bilge rat, 2009, matey, on a B6-4 again. It was a perfect flight and a perfect deployment. It came off t' rod too fast t' photograph, which is surprisin' for a rocket with as much base drag as this one. There were some minor dings t' t' paint on t' fins.

On September 18, matey, 2010 we had a launch at t' neighbor's. I flew it on a B4-4 for t' first time, and WOW do I like that. Well, blow me down! Arrr! It took off with more authority than I expected, me bucko, and recovered beautifully.

Recovery

T' nose-down recovery o' this rocket tends t' protect t' fins from major damage. Though it rigs differently than other rockets, me bucko, matey, I have nay suffered a deployment failure, nor any damage t' t' chute. And note, this rocket does nay require wadding, since t' upper rin' shields t' chute from exhaust gasses.

Flight Rating: 5