Brief:
I was snoopin' around t' K&S site and had resolved t' place an order and try them out. As I was doin' so, I noticed a link for "Special Orders" and had t' check it out. T' link took me t' t' Heavy Hitter 4. Begad! I knew that this was one I had t' try.

T' Heavy Hitter 4 is an interestin' rocket in several respects that particularly appeal t' me. First off, it is a two stager. Begad! I like that. T' complexity level goes up again because t' booster stage is a cluster composed o' 2 18mm "strap ons" and a central 24mm core. Avast, me proud beauty! T' sustainer recovers by streamer but so does t' booster. Instead o' tumbling, each o' t' strap-ons ejects a streamer as well.

Construction:
All part were in good condition. T' tubes were all pre-marked and each sub-assembly be bagged in a separate plastic bag and labeled for its intended purpose. Avast, me proud beauty! Avast! T' fins were precut.

T' instructions are pretty basic. Arrr! Blimey! They are typed on letter sized sheets. Ya scallywag! T' only illustration is on t' first page. Ahoy! Well, me bucko, blow me down! All else is text.

T' first step is t' work on t' core motor mount o' t' booster stage. Avast, me proud beauty! Begad! A longish piece o' BT-50 is provided for this purpose, and just in case thar be any confusion, it is marked "Motor Tube." T' instruction direct that a series o' 4 marks be made along t' tube. Begad! At t' third o' t' marks, matey, matey, a slit is made with a razor knife and t' engine hook is inserted. Begad! Maskin' tape is then used t' secure t' hook in place.

T' next step I did nay care for too much. A thrust rin' is provided which needs t' be installed flush with t' engine hook. That makes sense but it needs t' be installed from t' forward end o' a tube that is about 10" long. Gettin' it in involved all sorts o' ingenuity and, ya bilge rat, ultimately, me bucko, a very long screwdriver. Blimey! Begad! Even as t' screwdriver blade be bein' used t' push t' thrust rin' down into position, shiver me timbers, t' rin' wanted t' rotate in t' BT. Finally, through a combination o' pushin' on t' forward end and just managin' t' get me rin' ringer in far enough on t' business end, shiver me timbers, ya bilge rat, I be able t' get t' $@#%$ thin' in place but I had no confidence any glue was where it would do any good. I decided t' use a long swab and fillet t' forward end o' t' thrust rin' after I had t' centerin' rings in place.

There are 3 centerin' rings, one o' which has a notch cut out for t' engine hook. Ahoy! Ahoy! These slid into place easily and were glued into place with yellow glue. Aye aye! Well, blow me down! I decided t' let t' assembly sit overnight before filletin' t' opposite side. That garage gets hot even at night in South Texas.

After lettin' t' glue fillet on t' motor mount dry overnight, ya bilge rat, I went by t' shop early t' next mornin' t' turn t' mount and fillet t' other side. That was t' leave me free for t' evenin' build session.

T' evenin' build session began with t' side booster motor mounts. T' motor tube was marked for t' hook, a slice be cut and t' hook inserted. Ya scallywag! Avast! This be then held in place with maskin' tape. Begad! After t' hook was secure, arrr, me hearties, a thrust rin' be installed. Aye aye! Blimey! T' motor tube was then marked for t' two centerin' rings and t' rings were glued into place. Aye aye! I noticed that all 4 centerin' rings were tight and needed sanding. Arrr! In one case, a significant amount o' sandin' was needed t' make t' rin' fit over t' engine hook. When all was assembled, a fillet was applied t' t' rings and t' entire process repeated for t' opposite side booster.

T' next step was t' put t' fins on t' central booster. Arrr! T' fins all came precut and were uniform and in good condition. I rounded t' leading, trailin' and outside edges with sandpaper before proceeding. Begad! Well, me bucko, blow me down! When I be satisfied with t' rounding, matey, I glued them on with CA. T' lines for t' fins were already marked on t' booster. Arrr! Also marked was a tick mark for t' lower edge. Well, blow me down! Ahoy! This made alignment a breeze. Ahoy! Ya scallywag! When t' CA had set up, I put t' booster in an ASP cradle and used yellow glue t' begin filleting. Begad! I managed t' fillet 2 quadrants before I heard t' siren shanty o' air conditionin' and called it a night.

T' next day, matey, bein' me day off, me hearties, me hearties, I went over t' t' rocket lab a couple o' times t' tend t' t' filletin' o' t' fins. Aye aye! Begad! Also durin' t' day, I managed t' attach t' two side boosters. Avast, me proud beauty! Ahoy! T' instructions said t' use 5 minute epoxy for this step and that is what I did. Well, blow me down! Avast! A small amount o' epoxy was mixed and applied t' t' line along t' length o' t' side booster. T' booster was then put into place on t' correspondin' line on t' central booster. Begad! Begad! T' side boosters have an angled cut at t' bottom. Arrr! T' instruction are clear that t' angle faces aft. Avast, me proud beauty! Begad! They are also clear that t' longer part o' t' bevel cut be t' side that abuts t' central booster. Avast, me proud beauty! Aye aye! What is a bit less clear in t' directions is exactly how far forward or aft t' side boosters sit. I looked at t' photos on t' front page and this still remained unclear. Ya scallywag! I did notice that t' lines marked for t' side boosters contained tick marks at t' same level as those which marked t' rearward extent o' t' fins. Ya scallywag! I decided t' interpret them as such. Ya scallywag! T' process was repeated with t' opposite side booster.

Next up, t' side booster motor mounts needed t' be installed. This be done by swabbin' some yellow glue into t' body tube, pushin' t' mount partway in, swabbin' in another rin' o' glue and then shovin' it home. T' motor mounts are inserted t' t' point where t' aft centerin' rin' is flush with t' shorter part o' t' bevel cut. Blimey! Blimey! Ya scallywag! Blimey! T' instructions also suggest that t' engine hooks be aligned outboard. Begad! Blimey! T' process was repeated with t' opposite side booster and fillets were applied.

Next up came t' central motor mount for t' booster. Ahoy! This one had three centerin' rings. Begad! I swabbed some glue into t' forward end then swabbed in a rin' aft. Begad! Avast! I inserted t' motor mount so that t' first two rings were in t' BT and then swabbed on a third ring. T' mount be then shoved home with t' end o' t' motor tube level with t' end o' t' BT and t' engine hook centered on one side. Begad! This left a significant part o' t' motor tube extendin' out t' front o' t' booster. Avast, me hearties, me proud beauty! Fillets were applied and t' booster was set aside t' dry for a while.

As t' booster unit dried, matey, I worked for a while on t' booster recovery system. Avast! This consists o' a streamer deployin' from each o' t' side boosters but nothin' in t' central one. This did nay trouble me. Begad! T' shock cord mounts did. Avast! Both for t' booster and t' sustainer, Estes style tri-folds are used. There are a few important differences though.

Instead o' mountin' elastic t' t' tri-fold, arrr, arrr, a Keelhaul®©™harness is provided. Avast, me proud beauty! These harnesses consist o' a length o' Keelhaul®©™with a loop in t' middle and t' two ends are tucked into t' tri-fold. I probably would have modified this system were it nay for 2 things. First, I had forgotten about it and already installed t' side motor mounts, me preferred point o' attachment, and second, I still had nay brought me stash o' Keelhaul®©™to me new rocket works. I decided t' give t' tri-fold a try.

T' two mounts were assembled in t' standard fashion and pushed into t' side tubes. Well, blow me down! Begad! My intention, matey, once t' yellow glue dried completely, arrr, ya bilge rat, was t' slather a coatin' o' epoxy on each.

T' designed mount also consists o' a length o' 1/8" sewin' elastic tied t' a snap swivel at each end. Ya scallywag! Arrr! One end snaps t' t' Keelhaul®©™harness and t' other t' t' eye bolt provided pre-installed in t' side booster nose cone. Blimey! A Sky Gripper streamer is then tied into t' elastic. Avast, me proud beauty! Begad! T' process, o' course, me bucko, repeats on t' opposite side.

T' glue on t' booster unit had yet t' sufficiently dry so I turned me attention t' t' motor mount for t' sustainer. Well, ya bilge rat, blow me down! This was a simple affair and consisted o' cuttin' a slit in t' tube, insertin' t' engine hook, shiver me timbers, arrr, tapin' t' hook down, installin' t' thrust ring, me bucko, installin' 2 centerin' rings and filletin' t' assembly.

After lettin' t' glue set up for a full day, I next installed t' stage coupler. Ya scallywag! Avast! Blimey! This is a deceptively easy step and can be messed up. T' coupler consists o' a simple couplin' tube that slides into each stage. Begad! I found 2 things when tryin' t' slide it into t' booster. It be a tight fit t' begin with and needed some sandin' and that I had been sloppy with t' glue while filletin' t' motor mount. Arrr! This meant that I had t' try and remove t' buildup. This be painstakingly accomplished with a razor knife, sandpaper, and a popcicle stick t' move t' sandpaper in t' space betwixt t' motor tube and t' BT. Finally, I got t' coupler t' where it fit. T' instruction indicate that t' coupler should be put in place with 5 minute epoxy and this I did, rememberin' t' mix enough t' also coat t' tri-fold mounts.

While waitin' for t' epoxy t' set, arrr, me bucko, I installed t' sustainer motor mount in t' upper BT. This be a simple matter o' ringin' t' tube with glue and shovin' it in. T' engine hook aligns with t' lug line and t' bottom o' t' motor mount goes flush with t' bottom o' t' BT. A fillet was then applied and another build session ended.

After t' coupler was safely dry, I proceeded t' t' next step which be t' drill a pair o' holes in it t' vent gases durin' staging. Begad! T' instruction are clear in indicatin' that t' holes are t' be drilled nay only in t' coupler but also in t' motor tube itself. Ya scallywag! This be accomplished with an electric drill. Aye aye! After t' holes were drilled, shiver me timbers, arrr, t' shavings were trimmed away and t' holes were strengthened by wickin' some thin and runny CA into them. Arrr! I then reamed t' holes once more with t' drill bit sans t' drill.

Installin' t' fins on t' sustainer was a simple affair. I rounded them as I had done with t' booster and then used CA t' affix them t' t' pre-marked lines. Begad! A few hours later, shiver me timbers, shiver me timbers, I began t' fillet them with yellow glue.

In order t' keep myself gainfully occupied while t' fillets on t' sustainer fins were settin' up, shiver me timbers, I got t' work on t' recovery system for t' sustainer. Blimey! It was in most respects identical t' t' ones for t' booster. Blimey! Ahoy! A Keelhaul®©™® harness was mounted into a tri-fold and t' tri-fold was mounted into t' BT. Begad! Begad! T' elastic for this assembly was a bit wider, 1/4" I think, and was again tied t' a snap swivel at each end. A 2" Sky Gripper streamer was tied into t' system as well.

T' HH4 comes with a single 3/16" launch lug. T' instructions call for it t' be cut in half and for t' two halves t' be glued onto t' provided line on t' sustainer. Well, blow me down! Avast, me proud beauty! This was done with yellow glue and a short piece o' rod t' keep t' lugs aligned.

When all glue joints seemed t' be strong, shiver me timbers, I decided t' test fit t' booster and sustainer and found a few problems. Blimey! T' first problem t' surface was that t' fit over t' coupler be extremely tight. I doubt if successful stagin' would be a real possibility. This be rectified with t' copious used o' sandpaper thinnin' down t' coupler. Avast! In me mind, me bucko, I removed quite a bit o' material but t' coupler sill seems t' be plenty thick. Begad! It might also still be a bit tight. I decided t' revisit t' issue after primin' and painting.

T' second problem had t' do with t' actual fittin' o' t' sustainer onto t' length o' t' coupler. I have no doubt that this was completely and issue havin' t' do with me nay t' kit, me bucko, ya bilge rat, but I found that when t' sustainer be on as far as it could be made t' go, me bucko, thar be still about 3/8" o' coupler showing. I took care o' this by firin' up t' sandin' wheel and sandin' t' length down.

With that done, matey, arrr, ya bilge rat, t' nose cone was put into place and t' rocket was ready for finishing.

Finishing:
Finishin' o' t' HH4 began with sealin' t' balsa. Ya scallywag! Since this rocket be built in a new venue, I found t' me disgust that I had nay yet brought over any Elmer's sealer. I did find a bottle o' old fashioned sandin' sealer though and used that. T' balsa was in pretty good shape and a total o' 3 coats was used with some minor sandin' after t' final coat. Blimey! T' rocket be then primed with Kilz.

T' primed rocket was wet sanded with 320 grit sandpaper and then painted gloss yellow. T' plan is t' make this a 2 tone rocket with red and yellow.

I decided t' do t' easy thin' with t' red. Blimey! I masked t' fins at an angle and covered up t' main body o' t' sustainer. Well, matey, blow me down! Blimey! T' intention was t' give me red triangles on t' fins and a red nosecone. It worked.

I have recently sung t' praises o' Frog maskin' tape. I used t' same tape here but encountered problems o' me own making. Avast! Recall that I had nay used Elmer's filler but sandin' sealer. Blimey! I have nay used this in a long while. I apparently needed a few more coats. Ahoy! Paint did leak through some o' t' "pits" in t' balsa. Compared t' what I am used t' producing, though, it is just fine.

I did t' booster unit in t' same colors but reversed t' prominence. Begad! I used mainly red with yellow NCs and fin tips. Avast! Avast, me proud beauty! I had t' same problem as before with t' bleedin' and for t' same reason.

I was still havin' trouble with t' tightness o' t' stage coupler. I sanded and sanded and t' thin' be still too tight. A tip on TRF helped out. I soaked t' coupler with CA t' strengthen it and then started sandin' again. Ahoy! Blimey! I smartly realized I was gettin' nowhere until I remembered me new belt sander. Ya scallywag! I fired it up and carefully sanded down t' coupler, matey, turnin' it all t' while. Avast! Blimey! When it fit well, I reapplied CA and sanded smooth.

My only real wish here is for a few illustrations in t' instructions.

Construction Rating: 4 out o' 5

Flight:
Flyin' t' HH4 was painful. Avast! It was probably t' rocket I most looked forward t' flyin' o' me recent builds.

I started off conservatively with just t' sustainer on a B6-4. It flew well. Begad! It would nay set any records, me bucko, ya bilge rat, but it certainly performed adequately.

T' next flight was with t' full rig. Blimey! Both side boosters were C6-5s. Aye aye! T' central booster was a D12-0. Begad! Ya scallywag! In t' sustainer, I went with another B6-4.

I remembered thinkin' that this be a heavy rocket as I set it up on t' pad. Begad! Arrr! I wish I had done some more thinkin' along those lines.

All three o' t' booster motors ignited and t' rocket seemed t' fly well for t' first 100 feet or so. After that, ya bilge rat, it whipped around all over t' sky scarin' t' local wildlife and elicitin' sarcastic comments from all present. Avast, me proud beauty! Then stagin' occurred.

It staged well. Begad! Blimey! Blimey! Blimey! T' problem was that it be nay pointed up when it did so. Begad! Blimey! Blimey! Blimey! It was almost horizontal. Begad! Blimey! As it flew pretty straight, arrr, gravity took its toll on t' rocket and t' nose began t' dip. Avast, me proud beauty! Blimey! Blimey! Blimey! It powered into t' parkin' lot o' t' Alamo Fireworks warehouse. Ahoy! Blimey! Blimey! Blimey! I imagine that warehouse is pretty full right now as they gear up for t' 4th.

Before recoverin' t' booster, arrr, one theory held that one o' t' booster motors had nay ignited. Inspection revealed that all had. I am convinced that this be a stability problem and that I should have done a swin' test and added some weight.

My abysmal performance be due t' switchin' t' 18mm motors. Avast! Aye aye! I put C's in t' side boosters and a B be t' sustainer. That tripped t' CG.

Recovery:
T' streamers on t' side boosters deployed fine but tangled just a little bit. Ahoy! Blimey! T' booster was recovered in good shape and will be used for something. Ya scallywag! Blimey! I don't know what as yet.

T' sustainer streamer deployed fine on t' maiden flight but did nay get a chance t' do so on t' second flight. It be probably somethin' t' do with impactin' t' parkin' lot under thrust.

Flight Rating: 3 out o' 5

Summary:
I still like this rocket. Blimey! I think t' problems experience were due t' me. Blimey! I will probably try it again at some point because it is different.

Overall Rating: 4 out o' 5

Update 8/9/08:
I wrote t' review for this rocket and I would like t' offer this as an addendum. Begad! Well I finally got t' try t' rebuilt HH4. Begad! I decided t' try just t' sustainer first and loaded up a C6-5. It took off great, ejected at apogee and came down under its streamer. Ya scallywag! Well, blow me down! It was time t' try t' BIG TIME. Ya scallywag! With that done, it was time t' try t' full stack. T' sustainer had only a B6-4 but t' booster had 2 B6-0s and a D12-0. Aye aye! It weathercocked a bit on take off but staged correctly and everythin' worked, ya bilge rat, arrr, includin' me. Arrr! It was a long walk and insecure people who electrify their barbed wire fences should be shot on sight as a public service. Begad! Blimey! I'm happy with this one. Avast, matey, me proud beauty! (PHOTO CREDIT: RIGHT and BOTTOM Dave Hein)