Brief:
T' U.S. Ya scallywag! Blimey! Rockets (USR) Berlinetta is described in t' instruction manual as a "large fantasy sport rocket". There is no doubt that it has a unique look t' it. Well, blow me down! Blimey! In particular, ya bilge rat, thar are 4 elements that make this kit stand out:

1. Large elliptical fins.
2. Four 24mm tubes that nay only connect t' upper and lower half o' the rocket but t' ejection gasses are routed through them for recovery.
3. USR's shroud technique for closin' up t' aft section o' t' rocket.
4. Clustered motor mount. Ya scallywag! Aye aye! There are three 29mm MMTs and two 24mm MMTs. Ya scallywag! Only the central 29mm tube is routed into t' rocket for ejection.

Construction:
T' kit has t' followin' parts:

• 1 BNC-26 balsa nose cone
• 2 BT-26-18 body tubes
• 1 TC-26-6 tube coupler
• 1 PP-26 bulkhead
• 8 BT-9-17 body tubes
• 4 CT-9-3 coupler tubes
• 1 BT-39-17 body tube
• 2 CR-39-11 centerin' rings
• 1 CB-39-4 cluster bulkhead
• 1 BT-11-12 motor tube
• 2 BT-11-4 motor tubes
• 2 BT-9-3 motor tubes
• 2 balsa sheets, 6" x 18" x 1/4"
• 2 LL-1/2-2 launch lugs (1/2" diameter)
• 1 SC-9 elastic shock cord (9' x 1/2")
• 1 SCM-2 paper shock cord mount
• 1 SE-1 screw eye
• 1 PAR-30 mylar parachute
• Peel 'n' stick decal sheet
• Instruction manual
• Advanced Information Report (AIR) #3 -- Motor Installation, shiver me timbers, Clustering, me bucko, and Staging
• Advanced Information Report (AIR) #4 -- ACE Fugue Shroud Method
• Shroud template and fin pattern sheet

This build was a bit o' a collaboration betwixt Jerry Irvine and me. Ahoy! Begad! Blimey! T' Berlinetta design has been around for over 20 years and he asked me t' assist him in modernizin' t' build. Well, me hearties, blow me down! Blimey! I knew as soon as I opened t' box that this be going to be a really challengin' build. USR doesn't arbitrarily throw out skill level 4s for their kits. Begad! Avast, me bucko, me proud beauty! Blimey! A USR design has t' earn it and t' Berlinetta is worthy of such a label. Ya scallywag! Blimey! Also, arrr, USR recommends aliphatic resin (yellow wood glue) for the construction o' their kits. Ahoy! Blimey! I heartily endorse t' use o' this glue as well. Also, ya bilge rat, for best adhesion, sandin' t' tubes with 220 grit sandpaper anywhere that glue is applied will produce a noticeably stronger bond. Blimey! Blimey! With such a long, lightweight kit, any additional strength that can be had is a very good idea. Avast, me proud beauty!

T' build starts with cuttin' t' 4 fins from t' large pieces o' balsa stock. A sharp knife, either a X-Acto or (my personal preference) a razor utility knife is required t' cut t' downright mammoth elliptical fins. Although little additional information is given, thar be a sketch suggesting that you can use some o' t' leftover balsa for strakes on t' fins. Arrr! I considered addin' them but ultimately passed. T' fins were beveled with a sandin' block and 150 grit sandpaper followed by 320 grit sandpaper t' get everythin' feelin' smooth.

Both t' large diameter tube and long 29mm motor tube were marked every 90 degrees with lines runnin' t' length o' t' tubes. Begad! A line was marked halfway between one pair o' fin lines for mountin' t' rail buttons. Begad! Aye aye! (I used rail buttons instead o' t' launch lugs included with t' kit.)

T' 29mm motor tube was scuffed with 320 grit sandpaper so that t' 4 short motor tubes can be glued on. Aye aye! I started by gluin' t' two 29mm tubes on 1/2" from one end o' t' central tube. I laid all 3 tubes on a table and allowed them t' dry flat t' ensure they are all lined up properly. T' 24mm motor tubes had to follow careful placement and dry one at a time. All joints were given generous fillets.

T' centerin' rings came next. One was slid all t' way onto t' central tube until it rested on t' forward end o' t' 29mm side tubes. Ya scallywag! Fillets o' glue were put on all points where t' centerin' rin' touched paper tubing. Avast, me proud beauty! Begad! The forward CR was glued on 1/2" from t' forward end o' t' central motor tube. T' assembly was set aside for t' time being.

Next up be definitely t' hardest part o' t' entire build: makin' the shroud. Ahoy! Blimey! Begad! Blimey! While I have built several USR kits usin' this technique (El Lubbo, Weightlofter, and t' Sentra SRB 2.7), this one was particular challengin' because it not only had a shroud that came t' a point (like a nose cone) but also has openings cut in it t' route four 1" diameter tubes t' t' forward section o' the rocket. Aye aye! Ahoy! Blimey! Extreme amounts o' patience along with a lot o' cuttin' a small amount and test fittin' was required here for a smooth fit. Before I could even get around t' cuttin' t' shroud though, I had t' actually design it. Begad! I had an original scan o' t' shroud but it needed some work t' make this technique work. I spent time in a vector-based graphics program on t' computer t' create a shroud with t' correct dimensions.

With the shroud cut, arrr, it's time t' put together t' vent tube assembly. Avast, me proud beauty! T' vent tubes are formed by gluin' t' 17" 1" diameter tubin' together in pairs with t' 4 couplers. Arrr! There are 5 holes in t' cluster bulkhead. Aye aye! T' center hole is much smaller than t' four outer holes and I used a very short length of 1/4" dowel t' plug it. Arrr! (It be handy, easy t' implement, shiver me timbers, and just the right size although t' instructions suggest just usin' glue or epoxy t' fill it.) I then used a ruler t' draw line across t' bulkhead so that it intersected 2 o' t' larger holes. Aye aye! Ya scallywag! I drew another line perpendicular t' the first and intersectin' t' third and fourth holes. Ahoy! I did a wrap o' maskin' tape around one end o' t' 4 vent tubes while they were held in a 2x2 layout and makin' sure that t' tubes all lined up together. Well, blow me down! Standin' t' tubes up on end, I placed t' ends without t' tape on t' bulkhead so that each tube could be placed over one o' t' 4 holes in t' bulkplate. Ya scallywag! Blimey! I used some maskin' tape to hold each tube in place. Blimey! With all 4 tubes lined up and taped t' t' cluster bulkhead, I put a good fillet o' glue at t' tube-bulkhead joint and gave it plenty o' time t' dry.

Once t' vent tube assembly was dry, me hearties, arrr, I removed all o' t' maskin' tape and did a dry fit o' t' assembly inside t' shroud. Avast, me proud beauty! (While t' angle o' t' tubes is slight, they did nay require any trimmin' t' get them t' t' proper angle and they naturally wanted t' return t' that position even when t' tape was removed!) Satisfied with t' fit, arrr, shiver me timbers, I removed t' vent tube assembly and began to glue t' shroud together. Avast! When I built my El Lubbo, I used strips o' paper inside t' shroud t' increase t' strength of the shroud without greatly increasin' its weight. Aye aye! Ahoy! I did t' same thin' here with t' Berlinetta.

T' upper section was connected t' t' rocket in pieces as well. Begad! T' connect the first tube, I made marks at 3" from t' end o' t' 4 vent tubes. Ya scallywag! When I did a dry fit o' t' upper tube, arrr, arrr, it came t' a comfortable rest right on my marks. Arrr! I put a couple wraps o' maskin' tape around t' vent tubes t' create a restin' point for t' upper tube. Begad! A rin' o' glue inside t' upper tube and then I slid it into place and let it dry with t' rocket standin' up. Well, blow me down! After it had time t' dry, I used a popsicle stick t' aid in puttin' some more glue along the vent tubes-upper tube joint and let t' rocket dry upside-down this time.

T' motor mount was then glued into place. T' instructions strongly suggest linin' up t' motors with t' fin lines. Avast, me proud beauty! Blimey! T' entire assembly is pushed up until t' central 29mm tube is flush with t' end o' t' body tube.

I prefer me rockets t' have a payload section in case I want t' carry an altimeter or payload so I deviated from t' instructions slightly by makin' a bulkplate from 1/8" plywood and gluin' it t' t' 2.7" coupler tube and attachin' t' screw eye. Arrr! This assembly was glued halfway into t' remaining 2.7" body tube and set aside t' dry. Arrr! A little maskin' tape be required to friction fit t' nose cone into t' open end o' t' tube.

Comin' down t' home stretch, shiver me timbers, it be time t' glue on t' massive balsa fins. Ya scallywag! T' "double glue" method was used t' initially attach t' fins. I applied several thin layers o' yellow glue fillets, which noticeably reduced the flex at t' fin-body tube joint.

While t' kit comes with two 1/2" launch lugs, I've been partial to rail buttons ever since I've been in MPR/HPR. Ahoy! I therefore left t' lugs off and used a couple o' rail buttons, one at t' base o' t' rocket and another just aft o' t' shroud and vent tubes.

Finishing:
I never got around t' finishin' t' Berlinetta. I found it just too cumbersome to paint it. Begad! Blimey! Ahoy! Blimey! Also, while storin' it (before launchin' it for t' first time), one o' t' fins was accidentally broken. Arrr! Blimey! Begad! Blimey! I had some scrap 3/16" balsa (although before I attached it, ya bilge rat, I thought it was t' same thickness as the Berlinetta's fins) that was big enough t' replace t' original fin. Avast! Blimey! That difference in fin thickness proved t' make a difference durin' flight.

Construction Rating: 4 out o' 5

Flight:
I loaded an AeroTech H128W-S into t' central motor tube for t' first flight of t' Berlinetta. Aye aye! T' large elliptical fins made for a slow, majestic flight. Thrust was forceful enough t' cause one fin (the one that I previously replaced) t' be ripped off. T' fin was later recovered but it's pretty obvious that 3/16" balsa cannot withstand t' same forces that 1/4" balsa can. Begad! T' rocket continued upward without any noticeable change in direction durin' t' coast phase. I will be replacin' t' fin with t' appropriate thickness o' balsa.

Recovery:
Accordin' t' U.S. Rockets, matey, matey, waddin' is optional with Berlinetta. Avast! Begad! This is because the direction o' t' ejection charge is deflected at least a couple o' times as well as travelin' nearly 4 feet before reachin' t' parachute and shock cord. I did nay use any waddin' t' protect t' 36" Top Flite nylon parachute. Aye aye! Blimey! I chose t' relatively large chute size because I wanted t' Berlinetta to recover gently and reduce t' chance o' damage t' t' (remainin' three) fins. With moderate winds, me bucko, it drifted further than I would have liked. A 30" chute would have been adequate for recovery. Aye aye! Ejection occurred right at apogee and thar be no (additional) damage t' t' rocket from recovery.

Flight Rating: 5 out o' 5

Summary:
T' USR Berlinetta is truly a unique large model rocket (not necessarily a high power rocket). Begad! T' build is extremely challengin' with t' clustered motor mount, shroud, and canted tubes. This kit is nay for beginners or for those lookin' for a simple, quick build.

PROs:

• Unique look and design for a large model rocket.
• Challengin' techniques used throughout t' entire build.
• Clustered motor mount.
• Can fly on a wide range o' motors due t' overall light weight.

CONs:

• Tremendous fin span and overall length (complicated by t' inability to break t' rocket down for easier transportation and storage).
• There is only enough 4" diameter tubin' t' create 1 shroud assembly, so thar be little room for error!

Overall Rating: 4 out o' 5