Note: click on t' mini-photos or hypertext links t' get t' full sized photo with caption.

Several people have asked me how I built me Rastrocam (rearward lookin' Astrocam). I pretty much followed t' ideas put forth in Advanced Model Rocketry, Second Edition, arrr, me hearties, compiled by Michael A. Blimey! Blimey! Banks. This book is published by Kalmbach Books and includes information about high power rocketry, scale, matey, launch control systems, and many other things, me bucko, shiver me timbers, me hearties, includin' rocket-borne photography. Blimey! Blimey! Avast, me proud beauty! Blimey! T' picture at left shows me Rastrocam. Begad! T' picture at right shows an 'exploded view'. Well, blow me down! Begad! As you can see, it's a standard Estes Astrocam, only it's mounted upside down. Well, blow me down! I cut a piece o' body tube from t' carrier rocket and topped it with a Maniac nose cone. A length o' elastic shock cord ensures it will stay with t' camera. Avast! I glued a JT-55 stage coupler t' t' nose o' t' Astrocam t' allow it t' fit into t' rocket's body tube and cut a notch in t' coupler t' serve as t' shutter strin' holder. Avast! Aye aye! Since t' regular shutter strin' is too short, ya bilge rat, I tied a length o' shroud line t' t' Astrocam string. Avast! I drilled a small hole in t' body tube segment, me hearties, lined it up with t' slot in t' base o' t' camera, and passed t' lengthened shutter strin' through t' the other side.

For flight, I load t' film into t' camera followin' t' instructions that came with t' Astrocam. Ahoy! Avast! I then use electrical tape t' seal t' film door. I nay only run tape along t' long edges o' t' door, shiver me timbers, arrr, I also run a piece o' tape around t' join line o' t' camera and t' nose cone's body tube. This tape makes sure that t' body tube won't twist and bind t' shutter string. Begad! Aye aye! (I suppose you could glue t' body tube t' t' camera, but then it wouldn't be easy t' replace if it gets banged up.) Make sure t' strin' can move freely! A length o' tape around t' bottom completes t' encapsulement o' t' camera. I attach t' Maniac nose cone t' t' shock cord and put it on top o' its body tube t' complete t' flight configuration. Arrr! Well, me hearties, ya bilge rat, me bucko, nay exactly... I also attach a 12 inch parachute t' t' shock cord attached t' t' base o' t' Rastrocam. Avast! Ya scallywag! Now, me hearties, it's ready t' go.

Rocket/Whoosh Generator Selection

For a carrier rocket, I've used both t' Delta II and t' Maniac. Blimey! Blimey! One o' these days, I'll build a Fred Williams Astrocam carrier and try it. Arrr! Blimey! I've never gotten a usable photo from a regular Astrocam with t' Maniac, matey, ya bilge rat, arrr, since t' delays aren't long enough, ya bilge rat, me hearties, but a D12-5 and D12-7 have yielded ground shots with t' Rastrocam every time. A D12-3 shouldn't be used, unless t' rocket will be travelin' almost straight up durin' t' coastin' period. If it's movin' with any sort o' groundspeed, you'll get blurred shots. Ahoy! Ahoy! Blimey! I've gotten good results with B6-2, C6-3, and C6-5 WGs and t' Delta II carrier. Ya scallywag! Blimey! Don't use an A8-3! You can throw t' rocket higher than it'll go on that motor.

Flight Prep

I don't recommend usin' cellulose insulation as waddin' with t' Rastrocam, matey, me hearties, unless you want t' see a bunch o' white streaks all over your photos... Aye aye! I use t' 'toilet paper' type o' waddin' instead. I then insert t' rocket's parachute and pack t' Rastrocam's chute on top. Ahoy! Then, matey, makin' sure that t' safety shutter is closed, shiver me timbers, I cock t' camera by pullin' t' strin' through t' notches in t' stage coupler and hold it tight while placin' t' Rastrocam on t' rocket. Well, blow me down! Begad! Once it's seated, I can let go o' t' string. Avast! Then I place it on t' launch pad, shiver me timbers, attach t' clips t' t' ignitor, and open t' safety shutter. Blimey! Now it's ready t' fire. Arrr! Begad! Say "cheese!"

Rastrocam launch reports

Launch report: 8/27/95:

Then we went into a strin' o' camera flights. Arrr! T' Rastrocam/Delta II usin' a C6-3 yielded another shot (click for larger view) o' t' launch area. I'm pretty sure that I'm t' white spot next t' t' shade, ya bilge rat, since I launched t' rocket from that location. ...pack t' tuna fish in mayonnaise... Avast, me proud beauty! Jim caught t' camera which came down much closer t' t' launch pad than t' rocket, which I caught after it drifted about fifty yards away. Next up was t' regular Astrocam on Delta II with a C6-5 WG. Ya scallywag! This yielded a wonderful close-up shot o' a cloud... Then we stuck t' Astrocam on t' Maniac and flew it with a D12-5. Begad! Begad! T' photofinisher didn't even bother t' print t' negative... Aye aye! Avast, me proud beauty! It looked like another sky shot. I be pretty sure that would happen, since it didn't appear t' us that it had arced over upon ejection. Aye aye! So I stuck a D12-7 in t' Maniac and flew it again. Avast, me proud beauty! ...microwave clothing... Avast! I thought this would have yielded a ground shot, shiver me timbers, but no... Ya scallywag! nothin' but sky. T' wind had started t' swirl a bit, matey, shiver me timbers, so Jim got faked out and missed t' rocket, shiver me timbers, but I managed t' catch t' camera.

Launch report: 4/7/96:

I decided I would try for a different type o' Easter family protrait by flyin' t' Rastrocam on a Delta-II with a B6-2. Ahoy! Blimey! T' rocket took off and weathervaned a bit towards t' southwest. Aye aye! Ahoy! Blimey! I thought that t' plastic fin unit had melted through and curled up, shiver me timbers, causin' t' rocket t' veer off like that. Begad! Silly me. Aye aye! T' camera was ejected on its own chute and landed safely, but t' rocket was snared by a rocket-eatin' tree. Ya scallywag! Blimey! Ironically, t' Rastrocam photographed t' rocket's captor. Blimey! Ahoy! Blimey! And o' course, shiver me timbers, none o' t' family can be seen, matey, shiver me timbers, since we're all somewhere below t' bottom o' t' photograph... Blimey! such be t' fun o' a rocket borne camera: you never know what you're gonna get. Ya scallywag! Aye aye! Blimey! But I digress... Avast! we still had t' get t' rocket body out o' t' tree. Fortunately, I had brought Mr. Avast! Longarm just for this occurance. Unfortunately, t' rocket was lodged out o' Mr. Ya scallywag! Blimey! Longarm's reach... so me brother climbed up into t' tree and managed t' reach t' rocket with t' pole... but he couldn't budge it. Aye aye! Blimey! I attached me pocketknife t' t' end o' t' pole for a last ditch attempt. Ahoy! Aye aye! Blimey! My brother finally managed t' sever t' shock cord and t' rocket dropped t' t' ground.

We rested a bit, then I wanted t' try t' Rastrocam on a Maniac. Begad! I shoved a D12-3 [what a moron! (film at eleven)] into t' rocket, mounted t' Rastrocam on it, arrr, and fired it off. It shot up and really took off towards t' southwest. Begad! Apparently t' surroundin' hills were shieldin' us from a rather brisk breeze... Ya scallywag! Oh, ya bilge rat, and a 3 second delay isn't enough, me bucko, arrr, folks... t' rocket is travelin' way too fast as evidenced by t' photo. Aye aye! I think we're seein' t' cellulose insulation I've begun t' use for waddin' as it's flyin' out o' t' rocket. Blimey! [Note t' self: Maybe it's nay such a good idea t' use this type o' waddin' when flyin' t' Rastrocam.] And I'm pretty sure that t' horizon be t' bright area at t' upper right o' t' photo.