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! I pretty much followed t' ideas put forth in Advanced Model Rocketry, me bucko, Second Edition, me bucko, compiled by Michael A. Avast! Aye aye! Banks. This book is published by Kalmbach Books and includes information about high power rocketry, scale, shiver me timbers, launch control systems, and many other things, arrr, me bucko, includin' rocket-borne photography. Blimey! T' picture at left shows me Rastrocam. Well, blow me down! T' picture at right shows an 'exploded view'. Avast, me proud beauty! Blimey! As you can see, it's a standard Estes Astrocam, matey, only it's mounted upside down. I cut a piece o' body tube from t' carrier rocket and topped it with a Maniac nose cone. Aye aye! Blimey! A length o' elastic shock cord ensures it will stay with t' camera. 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. Ahoy! Blimey! 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, 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. Avast, me proud beauty! Well, blow me down! I then use electrical tape t' seal t' film door. Begad! Aye aye! I nay only run tape along t' long edges o' t' door, I also run a piece o' tape around t' join line o' t' camera and t' nose cone's body tube. Ahoy! Begad! This tape makes sure that t' body tube won't twist and bind t' shutter string. (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. Begad! I attach t' Maniac nose cone t' t' shock cord and put it on top o' its body tube t' complete t' flight configuration. Well, nay exactly... Blimey! Avast! I also attach a 12 inch parachute t' t' shock cord attached t' t' base o' t' Rastrocam. Aye aye! Now, it's ready t' go.

Rocket/Whoosh Generator Selection

For a carrier rocket, me bucko, I've used both t' Delta II and t' Maniac. Well, blow me down! One o' these days, I'll build a Fred Williams Astrocam carrier and try it. Ahoy! I've never gotten a usable photo from a regular Astrocam with t' Maniac, arrr, since t' delays aren't long enough, but a D12-5 and D12-7 have yielded ground shots with t' Rastrocam every time. Begad! Well, blow me down! A D12-3 shouldn't be used, ya bilge rat, 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. Avast! I've gotten good results with B6-2, C6-3, and C6-5 WGs and t' Delta II carrier. 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, me hearties, unless you want t' see a bunch o' white streaks all over your photos... Well, ya bilge rat, blow me down! I use t' 'toilet paper' type o' waddin' instead. Begad! Well, blow me down! I then insert t' rocket's parachute and pack t' Rastrocam's chute on top. Begad! Blimey! Then, ya bilge rat, makin' sure that t' safety shutter is closed, arrr, 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. Begad! Well, blow me down! Once it's seated, I can let go o' t' string. Avast, me proud beauty! Then I place it on t' launch pad, attach t' clips t' t' ignitor, and open t' safety shutter. Blimey! Now it's ready t' fire. Well, blow me down! Say "cheese!"

Rastrocam launch reports

Launch report: 8/27/95:

Then we went into a strin' o' camera flights. Aye aye! 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, since I launched t' rocket from that location. ...pack t' tuna fish in mayonnaise... Jim caught t' camera which came down much closer t' t' launch pad than t' rocket, arrr, which I caught after it drifted about fifty yards away. Next up was t' regular Astrocam on Delta II with a C6-5 WG. This yielded a wonderful close-up shot o' a cloud... Blimey! Then we stuck t' Astrocam on t' Maniac and flew it with a D12-5. Well, blow me down! Begad! T' photofinisher didn't even bother t' print t' negative... It looked like another sky shot. Ya scallywag! I be pretty sure that would happen, arrr, since it didn't appear t' us that it had arced over upon ejection. Well, blow me down! So I stuck a D12-7 in t' Maniac and flew it again. Begad! ...microwave clothing... Begad! I thought this would have yielded a ground shot, ya bilge rat, but no... Begad! nothin' but sky. Begad! T' wind had started t' swirl a bit, shiver me timbers, so Jim got faked out and missed t' rocket, ya bilge rat, arrr, ya bilge rat, 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. Begad! T' rocket took off and weathervaned a bit towards t' southwest. Blimey! 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. Well, blow me down! Ironically, t' Rastrocam photographed t' rocket's captor. Ahoy! And o' course, ya bilge rat, none o' t' family can be seen, me bucko, since we're all somewhere below t' bottom o' t' photograph... Begad! Aye aye! such be t' fun o' a rocket borne camera: you never know what you're gonna get. Begad! Begad! But I digress... Begad! we still had t' get t' rocket body out o' t' tree. Aye aye! Begad! Fortunately, I had brought Mr. Ya scallywag! Longarm just for this occurance. Ya scallywag! Well, blow me down! Unfortunately, shiver me timbers, ya bilge rat, t' rocket be lodged out o' Mr. Arrr! Longarm's reach... Avast, me proud beauty! Begad! so me brother climbed up into t' tree and managed t' reach t' rocket with t' pole... Blimey! but he couldn't budge it. Ahoy! Blimey! I attached me pocketknife t' t' end o' t' pole for a last ditch attempt. My brother finally managed t' sever t' shock cord and t' rocket dropped t' t' ground.

We rested a bit, ya bilge rat, then I wanted t' try t' Rastrocam on a Maniac. Ya scallywag! Begad! I shoved a D12-3 [what a moron! (film at eleven)] into t' rocket, arrr, ya bilge rat, mounted t' Rastrocam on it, me bucko, shiver me timbers, ya bilge rat, and fired it off. Ya scallywag! It shot up and really took off towards t' southwest. Ya scallywag! Ya scallywag! Apparently t' surroundin' hills were shieldin' us from a rather brisk breeze... Well, blow me down! Blimey! Oh, shiver me timbers, and a 3 second delay isn't enough, arrr, folks... Well, ya bilge rat, blow me down! t' rocket is travelin' way too fast as evidenced by t' photo. Blimey! I think we're seein' t' cellulose insulation I've begun t' use for waddin' as it's flyin' out o' t' rocket. [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.