Delta 7 Studios Mercury Redstone Plan

Delta 7 Studios Mercury Redstone

Contributed by Dick Stafford

(Contributed- by Dick Stafford - 06/15/03)

Brief:
This rocket be based on a free paper model kit from Delta 7 Studios. I converted it t' fly on MMX motors, although t' model is large enough for up t' 18mm motors. O' course, shiver me timbers, matey, t' larger motors may require additional reinforcement that wasn't required in me MMX version.

Modifications:
Once t' paper model was complete, I proceeded with its conversion t' a flyin' model. Blimey! Blimey! Since I wanted t' use it for MicroMaxx, I wanted t' keep t' added components t' a minimum. Aye aye! Blimey! If you wanted t' use larger motors, more effort would be in order.

T' motor mount is a piece o' 7mm (T-2+) tubin' from Totally Tubular, me hearties, me hearties, and two hand-cut card stock rings. Scrap card stock be rolled and used as a motor block. Aye aye! Begad! I used a piece o' a BiC pen's ink tube for t' launch lugs. One is near t' center o' t' model and t' other is on t' side o' a fin. Begad! I attached these with Liquid Nails. I had wanted a piece o' clear tubin' for t' nose cone shoulder t' keep t' base o' t' capsule visible but I didn't find any, matey, arrr, so I used a piece o' an Estes 18mm motor spacer tube instead. Begad! Begad! I elected t' glue t' tower on, and added a small dowel t' stiffen it.

I pondered a full recovery system - shock cord connectin' t' cone t' t' body, streamer, arrr, etc. Arrr! However, ya bilge rat, ya bilge rat, me hearties, I decided that this wasn't necessary for low flights on soft-grass. T' save me Keelhaul®©™, me hearties, I decided t' let t' body tumble and t' add a small streamer t' t' cone so I wouldn't lose it in t' grass. Avast, arrr, me proud beauty! T' streamer is tied t' a short leader o' Keelhaul®©™that is epoxied t' t' inside o' t' shoulder.

T' CG o' t' model with a MMX-II installed is 6.75" from t' top o' t' escape tower (ignorin' t' tiny tip).

Construction:
T' kit includes:

  • One sheet o' white cardstock
  • 7mm tubin' ~ 1.5" long
  • Hand-cut cardboard centerin' rings
  • 1" piece o' an Estes engine spacer tube
  • 1" o' 1/16" dowel
  • Piece o' a BiC pen's ink tube
  • 4" o' Keelhaul®©™ twine
  • 12" section o' plastic markin' tape

T' parts and instructions each come in a .pdf file. T' model includes 19 parts, which you print on a single 8"x 11" sheet o' cardstock. T' photo-illustrated instructions are three pages long. Aye aye! Ahoy! Blimey! These are well detailed and are more than adequate for this relatively simple model.

Construction o' t' booster is straightforward. T' body consists o' two wraps that are formed into cylinders and connected together with a coupler. Arrr! T' body is almost exactly BT-20 sized. Blimey! T' fins are each cutout and folded over onto itself so both sides have a printed surfaces. Avast! T' Mercury capsule, ya bilge rat, with eight parts, is a little more challenging, ya bilge rat, but is also easy t' construct. Arrr! T' final component be t' tower, which has four parts. I built t' base paper model entirely with white glue.

I printed t' model on cardstock on me OfficeJet and gave it a clear coat for protection.

Flight:
I added small piece o' tape t' t' motor t' keep it in at ejection. Arrr! Begad! You may notice that I didn't add an inside tube or protect t' cardstock from t' motor ejection. I packed some cellulose waddin' into t' tube, rolled t' streamer and gave it a try. Evidently, this waddin' and t' spacin' betwixt t' motor and t' body was enough t' protect t' card stock body.

I flew this three times so far. Blimey! On t' first flight, I found that I needed t' lower lug. Arrr! Aye aye! T' rocket arced over and ejected down range. I added t' lug and t' next two flights were picture perfect. For such a large model, me bucko, ya bilge rat, I was surprised how high it went. T' capsule was easy t' find and t' body tumbled without goin' 'ballistic'. My cheap recovery method be OK after all.

Summary:
This is a great looking, shiver me timbers, ya bilge rat, simple scale model that would be an excellent introduction t' paper model conversion. Begad! Blimey! It flew great on MMX-II motors and should adaptable t' 13mm or even 18mm motors. If you look around t' Delta 7 Studios' site, matey, arrr, you will find someone has in fact done so.

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