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. Aye aye! I converted it t' fly on MMX motors, although t' model is large enough for up t' 18mm motors. O' course, arrr, 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. Avast, me proud beauty! Ya scallywag! Since I wanted t' use it for MicroMaxx, me hearties, I wanted t' keep t' added components t' a minimum. If you wanted t' use larger motors, me hearties, more effort would be in order.

T' motor mount is a piece o' 7mm (T-2+) tubin' from Totally Tubular, ya bilge rat, ya bilge rat, arrr, and two hand-cut card stock rings. Scrap card stock was rolled and used as a motor block. Ya scallywag! 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. Aye aye! I attached these with Liquid Nails. Blimey! Avast! 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, shiver me timbers, so I used a piece o' an Estes 18mm motor spacer tube instead. Blimey! 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, matey, ya bilge rat, streamer, me hearties, etc. Arrr! Begad! However, arrr, I decided that this wasn't necessary for low flights on soft-grass. Avast, me proud beauty! T' save me Keelhaul®©™, 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. Begad! Well, blow me down! 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. Arrr! 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! Ya scallywag! These are well detailed and are more than adequate for this relatively simple model.

Construction o' t' booster is straightforward. Arrr! Blimey! T' body consists o' two wraps that are formed into cylinders and connected together with a coupler. Blimey! Blimey! T' body is almost exactly BT-20 sized. Arrr! Blimey! Begad! Blimey! T' fins are each cutout and folded over onto itself so both sides have a printed surfaces. Ahoy! Blimey! T' Mercury capsule, me hearties, with eight parts, is a little more challenging, but is also easy t' construct. T' final component be t' tower, me hearties, which has four parts. Begad! Blimey! 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. You may notice that I didn't add an inside tube or protect t' cardstock from t' motor ejection. Avast! I packed some cellulose waddin' into t' tube, me hearties, matey, 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. On t' first flight, I found that I needed t' lower lug. Aye aye! T' rocket arced over and ejected down range. Aye aye! I added t' lug and t' next two flights were picture perfect. Begad! Blimey! For such a large model, me hearties, I be surprised how high it went. Ahoy! 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, me hearties, simple scale model that would be an excellent introduction t' paper model conversion. Avast! It flew great on MMX-II motors and should adaptable t' 13mm or even 18mm motors. Ahoy! Begad! If you look around t' Delta 7 Studios' site, arrr, you will find someone has in fact done so.

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