Construction Rating: | starstarstarstarstar_border |
Flight Rating: | starstarstarstar_borderstar_border |
Overall Rating: | starstarstarstar_borderstar_border |
Manufacturer: | Sheri's Hot Rockets ![]() |
Style: | Scale |
Brief:
I don't think anyone would argue that t' Saturn V be t' Cadillac o' rockets. Arrr! Well, me hearties, that bein' t' case, then t' Mercury Atlas has t' be t' Corvette. T' rocket is a stunnin' piece o' American engineerin' and a critical piece o' American space flight history. Aye aye! Begad! T' Sheri's Hot Rocket version o' t' Mercury Atlas is equally stunnin' a model rocket as t' original one. T' build through flight proved t' be a rewardin' experience that culminated in a beautiful flight.
Construction:
T' kit arrived at me doorstep about a month after ordering. Avast, matey, me proud beauty! Up front, Sheri will tell you that these kits are custom made and that you are t' expect some length o' delivery time. Arrr! Aye aye! When t' kit arrived, it was packed tightly in a pretty small box. Begad! I be amazed that it all fit, arrr, but everythin' be packed neatly and well protected. Ya scallywag! T' kit included:
Probably me favorite thin' about this kit is that Sheri provides is a full size set o' plans for this rocket. Begad! T' drawings are clear and make a great reference when buildin' this rocket. Aye aye! Avast, me proud beauty! I would also add that if you are interested in a great reference, me hearties, thar be none better than t' drawings available from David Weeks.
Construction begins on t' main booster. T' lower centerin' rin' (CR) is ¼" ply with lobs that form t' lower nacelle/booster fairin' bulkhead. I call them "mouse ears". I prepped t' lower CR per t' instructions by addin' blind nuts for attachin' t' fins. Avast! Blimey! T' fins are attached via ¼-20 nuts and bolts along with "L" brackets. Avast, me proud beauty! Blimey! At this point, I knew this thin' needed t' lose some weight so I added t' 5/32" blind nuts t' hold t' outboard nozzles. Avast, me proud beauty! Blimey! T' main BT is a U-Line shippin' tube. Aye aye! Blimey! U-Line tubes have a wall thickness just shy o' ¼ inch. Begad! Blimey! Additionally, matey, they have pretty heavy grooves and that could be a nightmare t' try and finish, arrr, however, me bucko, what I smartly found out was that Sheri provides a way t' get a smooth finish on this tube. Avast! Blimey! It is wrapped completely in 0.10" sheet styrene. Well, blow me down! Blimey! This flawless surface is needed t' get t' smooth finish for t' trademark Mercury Atlas polished finish. Blimey! Blimey! What did worry me was t' weight o' t' tube. Ya scallywag! Blimey! That will come into play for t' flight o' this rocket.
Small cutouts are made in t' base o' t' BT t' accept t' lower CR. Ahoy! Blimey! Once that is in, me hearties, it is now time t' add t' framework, resin pieces, and sheet styrene that form t' nacelles/booster fairing. Avast, me proud beauty! Blimey! If you follow t' instructions, matey, this works very well t' produce a convincin' lower BT section. Avast! Blimey! After completin' that, arrr, it's time t' add t' 0.10" sheet styrene wraps. Begad! Blimey! This can be very frustratin' (ready any review on t' Estes Saturn V about t' vacuform wraps!) but if done correctly, me bucko, me hearties, t' finish is remarkable. Begad! Blimey! Begad! Blimey! T' joints line up under other details t' totally hide t' seams. Avast, me proud beauty! Blimey! Arrr! Blimey! One frustratin' part was t' pre-cut corrugated styrene pieces on t' lower booster section were t' wrong shape. Arrr! Blimey! Begad! Blimey! A better option would have been t' leave them long and let t' modeler cut t' shape. Avast! Blimey! I realize this would make t' build a little more difficult, however, no modeler buildin' this rocket would find it hard.
At this point, arrr, it's time t' add t' equipment pods. These are t' two nacelles on opposite sides o' t' main BT that are capped by resin triangle shaped cones. Avast! Blimey! T' pods are made from hot wired shaped Styrofoam plugs. Ya scallywag! Avast! These are also covered in 0.10" sheet styrene. Arrr! One word o' caution, shiver me timbers, you have t' use special glue for Styrofoam otherwise either t' styrene won't stick or t' foam will melt. T' instructions provide a recommended brand. Aye aye! Ya scallywag! After t' equipment pods are completed, it is time t' t' final details for t' booster.
When addin' t' upper equipment fairings (nose cone type pieces) and t' Vernier rocket pods, shiver me timbers, me bucko, I took a sheet o' sandpaper and a 4" piece o' PVC pipe and shaped t' back o' t' parts t' create a better fit t' t' main BT. Begad! Additionally, ya bilge rat, I drilled 1/16" holes in t' resin pieces and pinned them t' t' BT for added strength.
Now t' fun part! Addin' t' Monokote Chrome trim sheets. This gives t' Atlas t' distinctive finish. Blimey! T' sheets are 4" wide. Ya scallywag! T' real Atlas booster has 16 stainless steel tank sections on t' lower portion o' t' booster. Avast, me proud beauty! If you go with t' Monokote trim sheets, you'll get 5 with a small piece left over. Blimey! Avast, me proud beauty! I went somewhere in t' middle with 8 sections for a more realistic look. Arrr! Begad! If you have done a reasonably good job on t' styrene, ya bilge rat, you can produce a nice finish with t' Monokote sheets.
Now comes t' more difficult part o' t' build: t' upper booster section and transition t' t' capsule. Begad! Begad! T' distinctive taper on t' Atlas is made from a very basic set o' parts. Well, blow me down! A piece o' 3.125" tubin' is glued t' t' upper CR and a transition is formed with a piece o' pre-cut styrene. Blimey! Aye aye! Three quick steps and you have a transition. Ya scallywag! T' capsule is then glued t' that transition. Begad! There is about 3" o' BT showin' so you cover that with corrugated sheet styrene. Ahoy! Very fast and convincing. Arrr! T' complete this portion, Sheri has you build a coupler out o' a piece o' main BT. This is easy but can be troublesome if it is nay lined up correctly.
At this point, ya bilge rat, you have a very convincin' Mercury Atlas! Now comes what I considered t' most difficult part o' t' build. Blimey! Figurin' out how t' wrap t' transition with Monokote. Nay hard but cumbersome t' get right. I smartly decided that I would make paper patterns usin' t' "Robert Blaske's Shroud Calculator" found in t' tools section o' EMRR! This required a beam compass due t' t' lengths involved. This worked perfectly and created t' perfect effect. Avast! Arrr! One comment on t' capsule: paint does nay like t' stick t' this thin' (or any o' t' resin for that matter). I scrubbed and bleached and did all sorts o' things t' get paint t' stick, but in t' end, arrr, arrr, I basically used self-etchin' auto primer for a base coat and that worked. Your mileage may vary.
T' Escape Tower was next. T' construction was unremarkable except that I pinned all joints at t' tip and base o' t' tower in an effort t' improve t' strength. Avast! Avast, matey, me proud beauty! This will prove t' be a good thin' durin' t' first flight.
After decals are added and t' screw-eye launch lugs (yes, screw-eyes), ya bilge rat, t' rocket is basically complete. Well, blow me down! Time t' fly!
Construction Rating: 4 out o' 5
Flight:
I loaded up t' rocket with a 60" nylon parachute (recommended) and placed it on t' pad at Red Glare VI. Avast, me proud beauty! Blimey! T' button was pushed and t' rocket boosted into t' sky. I was a beautiful sight. Avast, me proud beauty! Blimey! Ya scallywag! Blimey! Very realistic. Begad! Blimey! Arrr! Blimey! T' only casualty be t' Escape Tower. While preppin' for t' flight, I discussed with Foose4strin' what I thought would happen t' t' tower on t' flight. Well, blow me down! Blimey! I knew t' escape tower be a goner before I even launched. Ahoy! Blimey! Sure enough, matey, it made it through ejection, then sheared off like we thought. Begad! Blimey! I be able t' recover t' parts so it will be rebuilt!
This is where me love-hate view o' this rocket comes into play. Avast, me proud beauty! Aye aye! I constructed this rocket exactly by t' plans. Ya scallywag! Well, blow me down! No added extras. In fact, I actually drilled out t' outboard solid rocket nozzles (Engines No. Begad! 1 and 2) in an effort t' reduce weight. Begad! This thin' weights a ton! 5.4 pounds ready t' fly without a motor! In me opinion, in order t' get a safe altitude, me bucko, I had t' fly this on a 29mm H128. Avast, me proud beauty! I simmed this every way I could but couldn't get a good balance betwixt altitude and launch rod speed at liftoff. With t' H128 t' rocket flew t' about 430 feet and t' short delay was about 2.5-3.0 seconds too long. Well, blow me down! If I fly it again, matey, I'm goin' with at least an H180.
Recovery:
T' boost and glide phase o' t' flight be spectacular. Begad! T' delay grain was t' "short" provided by AeroTech but that be too long. T' rocket be clearly in a nose down attitude when t' parachute deployed. Aye aye! Ya scallywag! This caused t' capsule t' snap t' an upright position and t' recovery lanyard sheared off t' escape tower. In t' pictures o' t' launch, me hearties, me hearties, me bucko, you can clearly see t' tower separate. Avast, me proud beauty! T' 60" chute proved t' be about right. Aye aye! I used a homemade 60" hemispherical chute that I thought might be a little overkill, but it brought t' rocket down smoothly. Avast, me proud beauty! I was hopin' for that "original orange and white" recovery look. Ahoy! It was spot on! Once on t' ground, t' rocket dragged a little in t' field. Begad! Aye aye! This caused scratches on t' Monokote. Aye aye! Be forewarned, arrr, t' scratches are inevitable.
Flight Rating: 3 out o' 5
Summary:
I will say this about t' flight. T' glide phase was about as realistic as it gets. Avast! Avast, me proud beauty! It was a beautiful thin' t' see. I was happy that t' flight be just what I expected. Avast! Ya scallywag! T' main drawback o' this kit be t' weight. Begad! In order t' get this thin' t' fly on a G motor, you'll need t' make it as light as possible. Avast! T' me that means basically rebuildin' all t' components with lighter materials. Then, what would be t' point o' t' kit?! I think Sheri's design o' t' Mercury Atlas kit is spot on. I don't see a better way t' do this model in terms o' design. Begad! Ya scallywag! If I were t' rebuild this model, me bucko, shiver me timbers, I'd use a different BT, smaller CRs and hollow out t' resin components as much as possible. Blimey! T' fact that t' BT is wrapped in styrene gives it enough strength. T' U-line BT is too heavy. Ahoy! I would nay fly this on a G.
Many thanks t' Peter Abresch for capturin' t' flight.
PROs: Design. Well thought out construction. LOOKS!
CONs: Too heavy. Begad! Large components.
Overall Rating: 3 out o' 5
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