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Estes Pro Series 1 Jayhawk

By Lester Anderson

Estes Jay Hawk

I am buildin' up an Ebay find. Avast! This is a 1/5 scale model o' t' Jay Hawk Supersonic target drone o' t' 1960's and 1970's. It is about t' same size as t' current Mad Cow Jay Hawk kit, 2.5 in dia. Begad! body tube for t' Estes vs. 2.6 in dia. for t' Mad Cow.

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Parts (2014-11-29 12:28:20)

As can usually be expected with an open EBay buy, parts were missing. Ya scallywag! I ended up havin' t' re-cut all t' centerin' rings, because t' originals were nay included. I also had t' re-cut t' rudder fins, also missing. Avast! T' me good fortune, thar was a lot o' wasted space on t' win' sheets. Ahoy! I moved t' "ailerons" t' a different spot, shiver me timbers, and cut 2 pieces o' rudder from each existin' sheet, me hearties, still leavin' enough balsa t' re-cut t' ailerons also. Thank goodness for YORP, ya bilge rat, which has t' instructions, me hearties, fins, and decals all scanned in a pdf file.(http://www.oldrocketplans.com/estes/est2085/est2085.pdf) Other than that, shiver me timbers, it is what you might normally expect from 20 year old parts. T' glassine has yellowed, as has t' nose cone. Arrr! Blimey! T' vacuum formed parts still look good. And t' existin' balsa was still straight.

 

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Engine mount and boat tail (2014-11-30 21:25:57)

T' instructions start by havin' you make t' aft boat tail. Begad! It is a simple paper transition glued t' itself. Avast! It was also one o' t' pieces nay included in t' EBay parts, so I ended up havin' t' cut out a replacement from some poster board I had layin' around. I double layered it for makin' a even seam on t' outside, and a slight increase in strength.

Jayhawk boattail   Jayhawk boattail 2 

 

Next comes some minor upgrades. Bein' as all t' existin' centerin' rings were missing, I needed t' make new ones. Ahoy! This was accomplished by drawin' them up with Autodesk's design program 123D Beta 9. Avast, me proud beauty! Autodesk does nay support this anymore, arrr, but it be t' most versatile 2 and 3D design program I have found for t' freeness o' it. Blimey! After the drawin' was done, I took t' design (converted into a PDF file on a flash drive) t' me local FabLab t' use their laser cutter. Wonderful tool, matey, made parts that were perfect t' first time. Ahoy!

fwd centering rings mid centering ring aft centering ring

I also made a retainer rin' t' help hold t' engine hooks in place. Blimey! This used t' be t' 24mm aft centerin' ring, arrr, which I repurposed. I decided t' upgrade t' a 29mm motor mount.

engine hook stop 

Next, I dry fit everythin' together t' see if it still looked right.

  

Next we move on t' gluin' it all together.

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Motor mount assy. (2015-01-13 21:49:16)

Well, now that t' holidays are over, it is time t' add more entry's t' this build. Avast, me proud beauty! We left off with dry fittin' all t' motor mount pieces together. Next came gluin' it up. I used Gorilla brand wood glue. I only plan on launchin' this on a 29mm G engine at t' most, me bucko, so I figured with 2 plywood centerin' rings backed up by 2 Bristol board centerin' rings, I believe I have plenty o' surface area t' grip to.

   

Next we need t' attach a shock cord anchor t' this beast. I used 1/16 galvanized braded steel cable from me local Lowe's hardware store, secured with a couple compression fittings. Begad! T' cable be covered with electrical heat shrink tubin' t' prevent t' cable from snaggin' on me shock cord or parachute.

    

T' base o' t' anchor has a piece o' 3/16 dowel wrapped in about 8 layers o' aluminum foil tape t' spread out t' ejection forces on t' centerin' ring. T' dowel is secured with a little more aluminum tape.

   

All that's left is t' glue on t' aft boat tail, then glue it into t' body tube.

 

 

jayhawk MMT and body assy

T' aft tail cone has a few ripples from where t' rubber bands held it together while t' glue dried. Begad! I will be fillin' all that with some wood filler and sandin' it smooth.

 

 

 

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Fins (2015-01-13 22:29:34)

Ok, I admit it. Ahoy! Over t' holiday's I did some work and forgot t' take pictures. Begad! I ended up almost completely workin' t' fins t' completion before takin' any pictures. Ahoy!

 

This would be t' Rudders, arrr, ailerons, ya bilge rat, and main wings. Ahoy! Blimey! As you may notice, t' wings are 4 different pieces o' wood. Well, blow me down! Blimey! T' "thru t' wall" tabs are from t' fin sheet, lockin' into t' motor mount assy. Begad! Blimey! T' leadin' edge is a piece o' model airplane trailin' edge stock, which t' instructions have t' matin' surface sanded t' make it "arrow" shaped. This way, thar be an equal bevel on top and bottom o' t' win' when it is glued on. Begad! Blimey!

 

Next are t' Rudders. These are 2 piece assembly's. Aye aye! Glued together at t' root edge, and beveled at t' leadin' and trailin' edges t' a 45 degree angle. I found t' easiest way t' get t' 45 degree angle was t' stack t' fins together with a 1 material thickness space on t' leadin' edge, arrr, then sand a surface across t' exposed edges till smooth. T' leadin' edge is easier than t' trailin' edge because o' t' included angle on t' trailin' edge.


And t' ailerons. Avast! Kind o' small, ya bilge rat, and difficult t' contour correctly.

   

These ailerons have t' wrong profile on them. They were too short t' properly bevel t' leadin' edge t' a 60 degree angle. That same shortness prevented me from bevelin' t' trailin' edge at an even taper from t' front bevel t' t' trailin' edge. Avast, me proud beauty! My solution was t' re-sand t' leadin' edges t' a sharper angle, assemble t' ailerons t' t' wings, then sand t' trailin' edges t' a finer taper.

   

T' first picture here is o' a detail on t' outer edge o' t' wing. Begad! Blimey! It is simply a match stick glued into t' factory cut edge. Aye aye! Blimey! It's purpose is t' hold he aileron in place while t' fin is bein' assembled. Ahoy! Blimey! T' only other gluin' surface for t' aileron be t' aft tail cone, shiver me timbers, because o' t' sharpness o' t' aileron's leadin' edge. I plan on laminatin' t' entire win' assembly with paper and epoxy for strength next. Blimey! Blimey!

 

Comments:

Jim Hodge (March 27, 2015)

Waiting..... Ahoy! C'mon Lester.

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Win' & rudder assy. (2015-04-18 21:22:29)

Just a couple pictures o' t' main win' assy. I used a little thin CA t' tack t' rudders t' t' end o' t' wings, matey, then some epoxy mixed with microballoons t' fillet the  joint. Begad! Next, laminatin' t' wings with paper and epoxy for strength.

     

a little bit o' detail from t' fins. One has been sanded, t' other has not.

 

   

 

 

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Fin and body attachment (2015-05-17 21:27:11)

Wings / fins are now epoxied  to t' main body tube. T' fillet's need some touch up sanding, ya bilge rat, as do t' tips o' t' rudders.

.

 

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Equipment bay (2015-07-15 22:58:30)

Finally got back t' buildin' this. Avast! I glued t' bottom blow molded equipment trough t' t' main body. Arrr! I'm still debatin' with myself if I want t' add fillet's t' smooth out t' bottom edge o' this decoration.

 

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Nose cone. (2015-07-24 22:47:51)

This nose cone takes a bit o' work t' put together for this model. Well, blow me down! Blimey! It has antennae t' glue t' it, t' leadin' edge o' t' equipment Bay, me bucko, and t' two elevators that t' original missile had. Avast! Blimey! I started by gluin' t' antennas on t' it.

Next, I glued on t' forward end o' t' equipment Bay with thin CA glue.

And lastly we go on t' elevators. These were two piece Affairs that needed t' be glued together before they were attached t' t' nose cone. Due t' every other review that I had seen showin' that these elevators were a weak point o' t' nose, they are completely filled with West systems epoxy for gluin' onto t' tabs that they hold on to. Begad! Even t' inside o' t' tabs was filled with epoxy.

All that's left now is t' smooth everythin' out in prep for primer.

 

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Paintin' and Decals (2015-08-09 22:52:22)

well I didn't take any pictures betwixt primer and paint. Well, blow me down! Sorry about that for those o' you have been watching. Begad! All in all t' paint turned out pretty good this time. 

I also decided t' redraw all t' decals. Blimey! T' scans provided by T' Olde Rocket Plans took up a lot o' space on a 8.5x11 sheet o' paper.

 

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Last Entry (2015-08-29 20:37:48)

well well this entry is finally done. Avast, me proud beauty! It's taken me t' longest o' any model t' build this Jayhawk. This is a primary reason I don't do scale models because they do nay fascinate me. So here are some pictures t' show it is complete.

 

 

 

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Jayhawk aeleron profile1

Jayhawk aelerons

Jayhawk aelron profile

Jayhawk aft centerin' ring

Jayhawk aleron profile 2

Jayhawk boattail 1

Jayhawk boattail 2

Jayhawk boattail 3

Jayhawk complete shock cord anchor

Jayhawk engine hook stop

Jayhawk engine tube

Jayhawk fin detail

Jayhawk fins

Jayhawk fwd centerin' rings

Jayhawk Mid Centerin' rin' assy

Jayhawk MM assy dry fit 1

Jayhawk MM assy dry fit 2

Jayhawk MM assy dry fit 3

Jayhawk MM assy2

Jayhawk MMT+body assy

Jayhawk motor mount tube

Jayhawk motormount assy1

Jayhawk nose antenna

Jayhawk rudder profile

Jayhawk rudders

Jayhawk shock cord anchor base detail

Jayhawk shock cord anchor end detail

Jayhawk shock cord anchor materials

Jayhawk Win' before sanding

Jayhawk win' laminated

Jayhawk wings 1

Jayhawk wings 2

PS1 Jayhawk win' assy

PS1 Jayhawk win' assy 2

PS1 Jayhawk win' epoxy

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