Introduction:

T' Pratt Hobbies D region Tomahawk is a sport scale model o' t' NASA soundin' rocket. Aye aye! Blimey! It gets it's name from t' D-Region o' t' ionosphere, which is about 75 t' 95 km above t' earth. Ahoy! Blimey! Begad! Blimey! This rocket is still in use by NASA to send instrument payloads into that region for scientific study. Avast! Blimey! T' finished rocket is just over 26 inches tall and has t' distinction o' handlin' 18mm, 24mm, and 29mm rocket motors through t' use o' t' adapters provided with the kit. Ya scallywag! Blimey!

Construction Rating: 4 out o' 5

T' kit arrived in t' familiar clear plastic bag with no shippin' damage to any o' t' parts. Begad! T' body tube is considerably stiffer than your standard Estes tube, arrr, as it is designed t' take t' force o' a "G" motor. Well, blow me down! There are various lengths and sizes o' tubes for t' body and motor mount adapters, Centerin' rings, a plastic pre-weighted nose cone, Kevar shock cord, me bucko, Nomex® cloth heatshield, streamer material, shiver me timbers, a self adhesive decal, and fins laser cut from "Lite Ply" plywood. Ya scallywag! T' fins are especially nice, me hearties, me hearties, bein' light, strong, and all cut exactly t' same. Avast! This saves time in t' finishin' o' the fins. Avast, me hearties, me proud beauty!

T' instructions come on two sheets o' yellow paper stapled together. There are few illustrations and they rely on t' text t' guide you through the construction o' t' kit. Aye aye! Aye aye! This is fine since this is nay a beginners rocket kit. T' instructions need t' be read carefully, so as nay t' miss any o' t' steps, as thar are sometimes several steps grouped together. Well, blow me down! T' instructions are laid out in a logical order, and thar be one template for fin alignment on the body tube.

T' construction o' t' Tomahawk is fairly easy and straight-foward. There are no tools needed, matey, only glue, arrr, tape and sandpaper. Aye aye! T' kit is basically an 18" body tube with four fins, ya bilge rat, shiver me timbers, and a shorter upper body tube that attaches to t' nose cone. Well, blow me down! At t' junction o' t' two body tubes is where t' rocket comes apart for recovery. Arrr! Avast, me proud beauty! They have a unique method for attachin' t' fins to the body tube that works extremely well. I be skeptical at first, me bucko, me hearties, but had to try it since it be in t' instructions. They apply glue t' t' root o' the fins, touch it t' t' body tube, and then remove it and set it aside. Blimey! Once all of t' fins are done this way, arrr, matey, then another layer o' glue is applied t' t' fin and t' attachment t' t' body tube is remarkable quick and strong, arrr, so quick, you can do all four fins in a matter o' minutes with white glue. Well, blow me down! The instructions give you t' option o' sandin' a sharp edge on t' fins. Ahoy! Do this as it improves t' looks o' t' rocket and t' Lite Ply hold t' sharp edge sanded into it. Aye aye! Avast! T' instructions call for mountin' t' nose cone on t' nose cone shoulder, arrr, but that was already done in this kit. Well, blow me down! T' nose cone and the shoulder are pre- assembled, arrr, weighted, shiver me timbers, matey, and filled with expandin' foam t' keep the nose weight in place. Avast! Blimey! Unfortunately t' nose cone was nay on straight when the kit arrived. Ya scallywag! One call t' Pratt Hobbies and a replacement be in t' mail, now that's great service. Avast! Avast! I then experimented with t' crooked nose cone. I ran a sharp knife blade around t' base o' t' nose cone and separated it from the shoulder. Avast, me proud beauty! T' two parts stayed together since t' expandin' foam was still intact. Ya scallywag! I then took t' upper main body tube and t' nose cone, arrr, shiver me timbers, ran liquid styrene plastic cement (the type that comes in a bottle with a brush) around the base o' t' nose cone. Ya scallywag! Before that set, arrr, me hearties, I then glued t' nose cone and shoulder into t' upper main body tube and held it together until t' glue set. This worked very well, shiver me timbers, as t' nose cone be now glued t' t' shoulder as well as t' upper body tube, arrr, and also aligned properly. Begad! T' kit also includes two sizes o' launch lugs, 1/8" and 3/16" for low power and mid power motors. Well, blow me down! I attached both t' t' rocket for future versatility. T' motor mount adapters are simple t' construct, and you have t' option o' leavin' them loose or gluin' them in place if you only intend t' use one size motor. Well, blow me down! Avast, me proud beauty! There are instructions for both methods with t' kit. Well, blow me down! T' rocket is very strong when completed, shiver me timbers, it has t' be t' survive t' kick o' a "G" motor. Ya scallywag! Begad!

T' instructions on finishin' t' rocket are brief and t' t' point. Arrr! The rocket is white, me hearties, me bucko, matey, three fins are black and one red. Well, blow me down! T' self adhesive decal is then applied t' t' top o' t' rocket and you are done. Blimey! I did nay like the color saturation o' t' decal, it looks like an Avery label that is fed through an ink jet printer, so I masked and painted t' stripes on t' top o' the rocket as well. Avast! Ahoy! This takes a little longer, but t' results are worth it. Arrr! The final result is a sharp lookin' rocket that looks very close t' pictures I have seen o' t' real thing. Well, blow me down! Begad!

Flight/Recovery Rating: 4 out o' 5

T' recovery method for t' Tomahawk is by Streamer. Begad! T' kit comes with a four foot long three inch wide section o' yellow plastic "CAUTION" tape, matey, t' type seen at construction sights. Ahoy! The Keelhaul®©™® shock cord is also four feet long, matey, and attached t' t' body tube coupler in t' nose cone section. Ahoy! Blimey! T' attachment t' t' lower section is by tyin' the cord t' a section o' body tube approximately one inch square with a hole in it, and then gluin' that into t' lower body tube. Blimey! Blimey! Be sure t' bow t' mount outwards since one side will nay touch t' wall if you don't. Avast, me proud beauty! Aye aye! Blimey! On t' cord is threaded a piece o' flameproof yellow Nomex® cloth. Ya scallywag! This is a nice feature that eliminates t' use o' wadding, me bucko, matey, and t' risk o' fire as well. Arrr!

Be sure that you read t' instructions on preppin' t' Tomahawk for flight. T' adapters are tricky and t' heatshield needs t' fill t' body tube and protect t' bottom o' t' streamer. Avast! T' motors that you can use sound like a laundry list o' available motors on t' market! T' only ones missin' are those from Apogee Components. Avast, ya bilge rat, me proud beauty! T' ones that Pratt has flown durin' testin' are; 18mm: Estes A8-3, me bucko, matey, B6-4, C6-7, shiver me timbers, Aerotech RMS C6-7, matey, matey, D13-7, ya bilge rat, D24- 10T, and E27-4T, 24mm: Estes D12-7, matey, Aerotech E15-7, matey, ya bilge rat, F24-10, me hearties, arrr, Aerotech RMS D15-7T, E18-7, E28-7 and F12-5J, 29mm: Estes/NCR Dark Star F52-7, shiver me timbers, Aerotech Econojet G35-7, arrr, matey, matey, Aerotech RMS F22-5J, me bucko, F40-10, F52-11, G33-7J and G64-10. What a list! T' stability o' a higher power rocket is o' concern, so Pratt has included t' Center o' pressure measurement for this rocket. If you are usin' t' larger motors, arrr, you will want to verify stability before you launch. Arrr! Heavier motors may require extra nose weight t' move t' center o' gravity forward past t' center o' pressure. All motors are retained usin' friction fit.

Since I wanted t' see how this model flies on t' lower end o' motors I tried an A8-3 first. Avast! Blimey! There was a slight breeze and t' Tomahawk weathercocked into t' wind easily. Arrr! T' ejection charge fired halfway back t' t' ground, sendin' t' motor mount out t' aft and t' streamer, thankfully, arrr, arrr, out the front as well. Begad! I would have hated t' have this rocket become a lawn dart on the first flight. Avast, me proud beauty! T' altitude could nay have been more than 100 feet. T' next motor I tried was t' venerable C6-5. Avast! Ahoy! This was better, me hearties, as t' rocket went t' an altitude closer t' 300 feet. Begad! Arrr! Unfortunately it also weathercocked and was headin' down when t' ejection charge went off. Avast, me proud beauty! Begad! Momentarily t' rocket was tangled in t' streamer and then it freed itself and dropped tail first. Unfortunately it landed in a parkin' lot and one o' t' fins took t' brunt of the force. Ya scallywag! Begad! There was a 1/2" square section o' t' fin that shattered. Well, shiver me timbers, blow me down! I fixed t' fin by gluin' a piece o' balsa t' t' fin and sandin' it into shape. This will nay be nearly as strong as t' Lite Ply fin, but it looks better. Avast! Arrr! By the way t' pictures were taken after t' repair. Blimey! Well, me hearties, blow me down!

A few observations on t' small engine performance are in order. Begad! Since this is a nose heavy rocket, arrr, that weathercocks easily on small motors, matey, launch the Tomahawk with t' wind, nay into t' wind. Aye aye! This will allow t' rocket t' be closer t' vertical when t' ejection charge fires. Blimey! Also t' Tomahawk comes down rather fast, shiver me timbers, shiver me timbers, do nay launch it over a parkin' lot or hard ground, arrr, as it will damage t' fins on landing. Make sure that you carefully read t' instructions on t' motor mount adapters. Well, blow me down! I missed a step which caused me t' try t' friction fit one too many adapters, ya bilge rat, which be responsible for t' motor mount being ejected on t' first flight. Ahoy! Finally, t' bigger motor t' better. The "C" worked much better than t' "A", and I am sure t' rest of t' alphabet will be even better. Avast, me proud beauty! Ahoy! If you do decide t' use t' larger motors, make sure that you use plenty o' trackin' powder, and have t' recovery crew standin' by. Begad!

Overall Rating: 4 out o' 5

Everythin' considered this is a rather unique rocket. Well, blow me down! Blimey! T' parts are o' high quality, t' selection o' motors is vast, and t' kit looks great when finished. Begad! Blimey! I do nay suggest t' lower power motors, as they do nay allow this rocket t' really fly, me hearties, but it would be a great demonstration rocket t' show the relative powers o' a large variety o' motors. Considerin' t' price ($12.95 last I looked), arrr, t' quality far exceeds t' cost. Ya scallywag! Blimey! Aye aye! Blimey! Add t' ability o' the Tomahawk t' fly on any motor from 18mm t' 29mm, arrr, me hearties, you will be able t' fly it under any circumstances, t' excuse "I don't have t' right motor" will nay work on this rocket! Blimey! T' main detraction is that t' instructions could be clearer, one extra sheet would make a world o' difference, me hearties, and the small motors are marginal in their performance. Arrr! Blimey! Avast, me proud beauty! Blimey! Other than those two nits, this is a great kit for t' experienced builder that would like t' "ease into" mid power rocketry.