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

For flight, me bucko, I load t' film into t' camera followin' t' instructions that came with t' Astrocam. I then use electrical tape t' seal t' film door. I nay only run tape along t' long edges o' t' door, me hearties, ya bilge rat, I also run a piece o' tape around t' join line o' t' camera and t' nose cone's body tube. Begad! This tape makes sure that t' body tube won't twist and bind t' shutter string. Well, blow me down! Arrr! (I suppose you could glue t' body tube t' t' camera, matey, 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. Avast, me proud beauty! Arrr! 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, nay exactly... Avast, me proud beauty! I also attach a 12 inch parachute t' t' shock cord attached t' t' base o' t' Rastrocam. Blimey! Now, it's ready t' go.

Rocket/Whoosh Generator Selection

For a carrier rocket, I've used both t' Delta II and t' Maniac. Aye aye! One o' these days, I'll build a Fred Williams Astrocam carrier and try it. Aye aye! Arrr! I've never gotten a usable photo from a regular Astrocam with t' Maniac, arrr, me bucko, since t' delays aren't long enough, shiver me timbers, shiver me timbers, 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. Arrr! If it's movin' with any sort o' groundspeed, ya bilge rat, you'll get blurred shots. Begad! I've gotten good results with B6-2, ya bilge rat, C6-3, ya bilge rat, and C6-5 WGs and t' Delta II carrier. Avast, me proud beauty! Don't use an A8-3! Blimey! 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, unless you want t' see a bunch o' white streaks all over your photos... Begad! I use t' 'toilet paper' type o' waddin' instead. Well, blow me down! I then insert t' rocket's parachute and pack t' Rastrocam's chute on top. Then, makin' sure that t' safety shutter is closed, me hearties, 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. Once it's seated, I can let go o' t' string. Then I place it on t' launch pad, attach t' clips t' t' ignitor, and open t' safety shutter. Now it's ready t' fire. Ahoy! Say "cheese!"

Rastrocam launch reports

Launch report: 8/27/95:

Then we went into a strin' o' camera flights. Avast, me proud beauty! Aye aye! T' Rastrocam/Delta II usin' a C6-3 yielded another shot (click for larger view) o' t' launch area. Begad! I'm pretty sure that I'm t' white spot next t' t' shade, since I launched t' rocket from that location. Avast! ...pack t' tuna fish in mayonnaise... Jim caught t' camera which came down much closer t' t' launch pad than t' rocket, matey, which I caught after it drifted about fifty yards away. Next up be t' regular Astrocam on Delta II with a C6-5 WG. Ahoy! This yielded a wonderful close-up shot o' a cloud... Avast, me proud beauty! Then we stuck t' Astrocam on t' Maniac and flew it with a D12-5. Aye aye! T' photofinisher didn't even bother t' print t' negative... Ahoy! It looked like another sky shot. I be pretty sure that would happen, me bucko, since it didn't appear t' us that it had arced over upon ejection. So I stuck a D12-7 in t' Maniac and flew it again. Begad! ...microwave clothing... I thought this would have yielded a ground shot, but no... Well, blow me down! nothin' but sky. Begad! T' wind had started t' swirl a bit, arrr, me hearties, 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. Aye aye! T' rocket took off and weathervaned a bit towards t' southwest. I thought that t' plastic fin unit had melted through and curled up, causin' t' rocket t' veer off like that. Silly me. T' camera was ejected on its own chute and landed safely, but t' rocket be snared by a rocket-eatin' tree. Ironically, t' Rastrocam photographed t' rocket's captor. And o' course, matey, none o' t' family can be seen, me bucko, since we're all somewhere below t' bottom o' t' photograph... Aye aye! Well, blow me down! such be t' fun o' a rocket borne camera: you never know what you're gonna get. Begad! But I digress... Ya scallywag! we still had t' get t' rocket body out o' t' tree. Begad! Fortunately, I had brought Mr. Begad! Well, blow me down! Longarm just for this occurance. Unfortunately, me hearties, arrr, t' rocket be lodged out o' Mr. Longarm's reach... Avast, me proud beauty! Well, blow me down! so me brother climbed up into t' tree and managed t' reach t' rocket with t' pole... Arrr! but he couldn't budge it. I attached me pocketknife t' t' end o' t' pole for a last ditch attempt. Well, blow me down! Well, blow me down! 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. Well, blow me down! I shoved a D12-3 [what a moron! Blimey! (film at eleven)] into t' rocket, mounted t' Rastrocam on it, and fired it off. It shot up and really took off towards t' southwest. Apparently t' surroundin' hills were shieldin' us from a rather brisk breeze... Avast, me hearties, me proud beauty! Blimey! Oh, me bucko, and a 3 second delay isn't enough, arrr, me hearties, shiver me timbers, folks... Avast, me proud beauty! Avast! Blimey! t' rocket is travelin' way too fast as evidenced by t' photo. I think we're seein' t' cellulose insulation I've begun t' use for waddin' as it's flyin' out o' t' rocket. Ahoy! 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.