Brief:
Back in t' mid-70s I be lookin' for an interestin' D engine boost glider t' build. Well, blow me down! Durin' those years I be buildin' rockets constantly so new and unique projects were always on me agenda. I had read somethin' about a Bruce Blackistone design for a canard glider with a planform similar t' t' Air Force XB-70 bomber. Arrr! His original design be sized for A through C engines although he may have recommended D engines. Blimey! I thought it would be more fun t' double t' size and so this project came about. Aye aye! Well, blow me down! I flew t' one I built back then 3 or 4 times until on one flight it flew through some high-power lines and shredded. Well, blow me down! Begad! About 3 years ago I figured it was time t' build another and that be t' basis for this review.

Construction:
T' Valkyrie uses a bunch o' balsa sheet. T' primary materials you will need t' begin construction are:

• (2) 4” wide x 3/16” thick x 36” balsa sheet
• 4” wide x 1/8” thick x 36” balsa sheet
• (3) 1/8” x 1/2” x 36” spruce strips
• 1/8” x 1” x 36” spruce strip
• 1/8" x 1/8" x 36” basswood strip
• BT-50 body tube
• EB-50 engine block (or substitute)
• BT-50 size nose cone
• Plans for t' small model are online at T' RocketShoppe.

T' first step in buildin' t' Valkyrie is t' build t' main wings. Arrr! Blimey! Since I be scalin' up t' design, I had t' determine a method t' lay out t' double size main win' onto t' balsa. Well, blow me down! Blimey! This was goin' t' be a little difficult since t' win' is so large and would require two separate pieces and a small triangle o' t' 4” wide balsa t' be glued together. Ahoy! Blimey! My solution was t' take a large piece o' scrap cardboard from a shippin' box and t' layout t' planform on that usin' a ruler and doublin' t' sizes from t' plans I had. Begad! Blimey! Once this cardboard template was cut out, I lined up me two sheets o' balsa such that, ya bilge rat, with minimal excess, shiver me timbers, I could trace t' desired triangular templates onto t' balsa sheet. Avast, me proud beauty! Blimey! Begad! Blimey! T' grain o' t' balsa needs t' be aligned with t' leading-edge sweep o' t' wing, so t' template be positioned on t' balsa t' do this. Begad! Blimey! After cuttin' each o' t' win' pieces for left and right win' t' next step is t' glue them together. Ahoy! Blimey! I took a piece o' wax paper t' length o' t' joint and on our very flat kitchen countertop, me bucko, I glued t' win' pieces together with Titebond while keepin' them perfectly flat usin' books as weights. Well, blow me down! Blimey! Once t' main win' panels have dried, I then took me Xacto knife and trimmed t' leadin' and trailin' edges. Avast! Blimey! For this bird, me hearties, shiver me timbers, I trimmed t' leadin' edge with a rounded shape from top t' bottom and reversed this on t' trailin' edge. Arrr! Blimey! Ahoy! Blimey! Once I had cut t' preliminary shape with t' knife, me hearties, I finished up by sandin' a smooth curve on both edges. After this is done t' tip on each win' is cut as per t' plans. Arrr! Blimey! After separatin' t' tips, me bucko, me bucko, t' win' should be blocked up t' t' correct height and t' win' tip should be reattached t' t' main win' creatin' t' win' dihedral. Avast! Blimey! I carefully sandin' along t' root edges o' t' main win' and tip t' allow for a flush fit when joined. After finishin' up t' main win' I cut t' upper and lower rudder pieces from t' sheet balsa as well.

My next step was t' build t' fuselage. Begad! Well, ya bilge rat, blow me down! Blimey! Bruce came up with a unique solution with his design o' a T-boom. Begad! Ahoy! Blimey! It adds little weight but significantly increases t' strength o' t' boom. Begad! T' small version uses a T-boom made from balsa, matey, but I figured for me larger version spruce might work better. Arrr! Since t' boom is about 50 inches long it was goin' t' require two strips o' t' spruce for both halves o' t' T. Ahoy! Aye aye! Blimey! I used a full 36-inch length o' spruce for each o' t' vertical and horizontal halves o' t' boom and then cut two 14 inch pieces t' lengthen each half. Aye aye! For t' lower half I glued these two lengths together and added a 1/16-inch-thick plywood doubler at t' joint. For t' upper half I did t' same thin' but added a plywood doubler t' each side. Well, blow me down! After these had dried, me bucko, I then aligned t' upper half centered on t' lower half and use CA glue at numerous locations down t' length t' glue t' t' two halves together t' form a T. Arrr! Aye aye! Blimey! When attachin' t' upper t' lower halves I reversed t' location o' t' butted joints on t' boom halves, so they were at opposite ends relative t' each other, me bucko, me bucko, I didn’t want t' joints t' be at t' same location. Ahoy! Arrr! Blimey! T' finish up I then ran a thick bead o' Titebond® glue along t' joint for t' entire length o' t' boom on both sides.

Next up was gluin' t' win' panels t' t' fuselage. Begad! For this glider that was very easy since t' inverted dihedral o' t' win' tips sets t' dihedral correctly. Well, blow me down! Ya scallywag! T' win' root edge was sanded for a better fit into t' T o' t' fuselage and then I glued t' wings t' t' fuselage with Titebond. Avast! After t' wings have dried, I drew t' alignment lines on t' wings for t' outboard rudders and glued t' rudders into place. Aye aye! I had previously sanded a symmetrical airfoil into t' rudders. Avast, me proud beauty! T' small bottom fin be also airfoiled and glued t' t' bottom o' t' boom.

T' canard surface was t' next step. Aye aye! Arrr! It was cut from 1/8-inch-thick balsa with t' grain runnin' parallel t' t' trailin' edge. Ahoy! I simply doubled t' dimensions on t' plans and drew that planform onto t' balsa sheet. T' canard is in two pieces, arrr, t' primary surface and t' movin' trailin' edge. Avast, me proud beauty! I sanded t' leadin' edge symmetrical and sanded a slight rounded shape t' t' trailin' edge. For t' elevator surface I slightly rounded t' leadin' edge and sanded a symmetrical shape into t' trailin' edge. Begad! I then gave both surfaces a good coat o' clear dope t' seal t' balsa and after it dried, I lightly sanded t' surfaces smooth. Arrr! T' elevator was then attached t' t' fixed surface o' t' canard with silver mylar tape on t' bottom and top while leavin' a gap in t' upper top tape for gluin' t' canard t' t' boom. Begad! T' canard was then located on t' boom and glued into place on t' bottom o' t' boom per t' drawing. Aye aye! Finally, me bucko, ya bilge rat, arrr, a piece o' t' 1/8-inch square basswood 14 inches long was glued t' t' movin' canard surface so that it extended from t' trailin' edge o' t' canard forward and parallel t' t' fuselage about 1/32 inch t' t' side o' t' fuselage. This basswood strip forces t' canard trailin' edge flat durin' boost bein' locked down with a tab from t' pop pod. T' final step in t' glider build be t' form two small hooks from music wire and glue t' t' bottom o' t' canard, arrr, matey, one on t' fixed surface and one on t' elevator, usin' CA glue strengthened with epoxy. A rubber band will be stretched betwixt these two hooks t' actuate t' canard elevator after pod ejection.

Pod construction was next in t' buildup. Begad! T' pod is a basic pop pod design and relatively simple t' build. Aye aye! First cut a 7.5-inch length o' spruce from t' 1/8” by 1” spruce strip. Begad! Cut an 11” piece o' BT-50 body tube. Well, blow me down! Align t' spruce directly lengthwise with t' body tube and glue into place with CA glue and then fillet with Titebond. T' next step was t' cut t' pod hooks from an excess piece o' 3/16” x 1/8” spruce strip. Avast! They are cut long enough t' be positioned at a 45-degree angle from t' T-boom joint t' t' bottom o' t' pod. Begad! Aye aye! Four are required and two on each side are glued t' t' boom with a matin' face glued t' each side o' t' pod. Avast! For this large a bird I also glued two spruce pieces t' t' pod near t' forward end that were similar t' t' hook pieces but were perpendicular t' t' boom t' act as guides t' keep t' pod centered and stabilized on t' fuselage. Ahoy! Ahoy! I then glued two short pieces o' 3/16” launch lug slightly off t' wood standoff o' t' pod. Begad! Avast! These should be separated about 5” for t' launch rod t' provide good stability t' t' glider on t' pad. Avast, arrr, me proud beauty! Finally, t' pod t' boom assembly should be carefully sanded at all t' matin' locations so that t' pod easily falls off t' glider. Avast, me proud beauty! Durin' boost t' aerodynamic forces will keep t' pod attached but as soon as t' chute pops out it will separate. Begad! Aye aye! A shock cord and 12” parachute should be installed in t' pod.

Finishing:
Since this model should be as light weight as possible keep finishin' t' a minimum. I have seen some people simply paint t' bottom surface with a fluorescent color. Begad! Blimey! For me model I sprayed clear butyrate dope on t' balsa surfaces and after it had dried, shiver me timbers, I sanded it lightly. Avast! Ya scallywag! Blimey! This would help t' protect t' balsa against any water that might get on it.

Flight:
Because o' t' large size o' this model, arrr, I launch off a kludged together pad. I took a spare piece o' 1” PVC tube I had lyin' around and cut off a 5-foot piece. Begad! I cut one end at a 45-degree angle so I could easily push it into t' ground. Ya scallywag! At t' field I simply tape a 3/16” diameter rod t' t' flat end o' t' PVC and push t' assembly into t' dirt. Blimey! T' Valkyrie is then provided a long enough rod assembly t' be completely suspended a few inches off t' ground. Avast, me proud beauty! A long set o' electric leads is also necessary, and I usually brin' a lead extension t' provide for t' distance needed from t' launch system t' me glider. It is also a good idea t' secure t' leads so they will nay hook t' glider as it leaves t' pad.

I fly me Valkyrie on Estes D12s and may someday put an E9 in it. Ahoy! A friend also has one he flies more frequently than me and he has used E9s successfully. Ya scallywag! His glider is somewhat heavier than mine. Avast, me proud beauty! Begad! I have even used it two or three times in competition.

Recovery:
Since t' primary use o' t' Valkyrie is as a glider a little effort should be made in trimmin' it for flight. Avast, me proud beauty! T' trick t' trimmin' a Valkyrie is that a pin is pushed through t' fuselage about 1.5” forward o' t' trailin' edge o' t' fixed canard surface. Well, arrr, blow me down! A rubber band is attached t' t' hooks on t' bottom o' t' canard t' cause t' trailin' edge t' drop once t' pod ejects. Begad! T' canard trailin' edge usually droops betwixt 10 and 25 degrees as required t' adjust your glider for a flat glide. Ya scallywag! Carefully toss t' glider with t' pin adjusted as best you can guess and see how flat t' glide is. Avast, me proud beauty! Begad! Continue this process, pushin' t' pin through t' spruce boom is nay easy, me bucko, until you think you have a good, flat glide. I will admit that trimmin' a Valkyrie is nay too easy since you cannot really get a good toss for an extended glide. Blimey! However, me bucko, you can usually get somethin' reasonable doin' this and after each flight you can move t' pin t' refine t' glide. Aye aye! My results with this Valkyrie have been very good and I typically get 1.5 minute plus flights in dead air. Avast, me proud beauty! Avast, me proud beauty! Hopefully thar will have been an inherent turn built into t' glider, shiver me timbers, so it does nay simply fly straight away from you. All o' t' models built here in Florida tend t' have a natural turn, if nay you will need t' tweak a rudder or use some other method t' get your Valkyrie t' turn.

Summary:
T' Valkyrie is a great sport bird and is what I would call a “true” rocket lofted glider. It looks more like t' type o' glider you would expect t' be flown with a rocket engine than t' more competitive but more typical competition gliders. Well, blow me down! It is also fairly straight forward t' build and easier t' get a reasonable glide from as well as bein' somewhat more robust durin' boost due t' t' design. Avast, me proud beauty! Mine has always boosted almost perfectly vertical, arrr, even in a 10-mph breeze, and t' pod separation is extremely reliable. Arrr! Well, arrr, blow me down! Finally, arrr, a rocket glider on t' field o' this size always attracts attention, even from t' HPR guys and everyone enjoys watchin' t' flight.