Construction Rating: | starstarstarstarstar_border |
Flight Rating: | starstarstarstar_borderstar_border |
Overall Rating: | starstarstarstarstar_border |
Manufacturer: | Tango Papa |
Brief:
2x upscale o' classic Estes Mars Lander. 38mm motor mount accommodates a range o' recommended motors in t' G-I
range, me hearties, some o' which require a 29mm adapter.
Construction:
Parts list:
Included instructions are thorough and probably mirror t' techniques used in the 3.9" and 1.6x upscales offered by Tango Papa. Instructions basically follow t' logical sequence introduced by the Estes Kit 40-odd years ago. Begad! Since this is complex mid-to-high power rocket, me bucko, previous experience is a must. Arrr! No real "gotchas" discovered by me, shiver me timbers, just make sure you read through t' instructions several times t' become familiar with t' steps. Avast, me proud beauty! Ya scallywag! If you take your time, follow t' instructions, me bucko, and build t' fly, ya bilge rat, this model has t' potential t' be a great performer.
Be careful rollin' t' two major shrouds. Aye aye! They'll crease if you're nay careful. Other than that, just have fun buildin' this beast.
Finishing:
Pros: T' fabric paint provides a nice touch t' t' external detailin' although in reverse compared t' t' classic
Estes kit (fabric paint is raised, ya bilge rat, Estes wraps are embossed and therefore t' detail is recessed.)
It's nay that easy t' get continuous straight lines with this stuff, ya bilge rat, ya bilge rat, so practice, me bucko, me bucko, practice, practice. Blimey! One good thin' is you can easily remove t' paint (wet or dry) t' make corrections. Just let adjacent paint dry before you proceed so you don't mess up t' acceptable work.
One gotcha that eventually worked itself out for me was paintin' t' landin' strut cylinders. Those clear plastic flexible tubes on t' upper dowel o' t' legs. Begad! Well, blow me down! Standard silver paint just would nay dry once applied and stayed tacky for months. I decided t' just cut t' tubes off and start over. Ya scallywag! Ahoy! I cut new tubes from hardware store bought tubing. Blimey! I slit it lengthwise so I could apply it over t' dowel, secured with a bit o' medium or thick CA. Blimey! Blimey! Then I took plain white mailin' labels with sticky back and cut t' size t' completely cover t' rubber tube. Blimey! Ya scallywag! This also provided an additional way t' secure them t' t' dowels since I had t' slit them t' get them t' fit over t' dowel. Arrr! Once those were complete I soaked t' mailin' labels with thin CA and let dry before sandin' smooth and paintin' them silver. This solution was perfect and t' paint dried perfectly. Aye aye!
I used Wal-Mart gloss white in a spray can t' finish t' body before applyin' t' provided decals. Begad! I used similar red and silver paint as appropriate. Tom's decals are excellent quality and I had no problems applyin' them. Begad! Ya scallywag! I haven't applied a gloss coat yet, maybe after t' next flight.
Tom provides no ballast for this beast. Well, blow me down! Tom calls for 13 ounces I hollowed out t' nose cone with a spade bit and used 5 ounces o' fishin' weights. Avast, shiver me timbers, me proud beauty! I think I actually used a bit more than 5 ounces - maybe 6 or 6 1/2 ounces t' be on t' safe side and account for excess epoxy used durin' construction o' t' aft end o' t' rocket. For t' weight in t' ascent shroud, I used 8 ounces o' sticky-back thin lead weights I bought at a Hobby Bench. Ya scallywag! Avast! I applied them around t' inside circumference o' t' ascent shroud, ya bilge rat, ensurin' I left enough space near t' top o' the shroud t' clear t' parachute tube. I then secured each strip o' weights with a good slatherin' o' epoxy. This method worked for me and should keep t' weights secured t' t' inside o' t' ascent shroud.
Another item you'll need t' provide is an inch or so o' 38mm motor tube for t' landin' pads. Where Estes used an 18mm engine block betwixt t' two discs, Tom tells you t' cut some 38mm motor tube. Ahoy! You should have some left over from the engine mount construction. Aye aye! Arrr! Also, t' landin' pads (2 discs for each leg) are thick balsa. You might upgrade these by visitin' a craft store and look for some round wooden discs. Well, blow me down! Begad! For t' top discs, you'll need t' cut an oval for the smaller end o' t' landin' legs t' fit into, me hearties, shiver me timbers, but carefully placed holes with a drill bit should accomplish that, followed by cleanin' up with a small rasp or file. T' small balsa side pieces on t' pads can also be upgraded with hardwood from t' hobby shop balsa display. Well, blow me down! Use plenty o' epoxy when gluin' everythin' together and they should hold together. Aye aye! T' token amount o' added weight over balsa should be negligible when usin' t' powerful motors while providin' additional strength t' t' landin' pads.
Construction Rating: 4 out o' 5
Flight:
Tom provides a table o' recommended motors t' include expected altitude, ya bilge rat, velocity, me hearties, ejection delay, me hearties, ejection velocity,
and which motors work best with engine ejection and electronic ejection. Avast! T' primary concern bein' shreddin' t' chutes
if t' expected ejection velocity exceeds t' "speed o' nylon."
Despite startin' me lander in fall o' 2006, ya bilge rat, I completed all t' major subassemblies t' flight specs includin' the entire airframe within a couple months then I let it sit for a few months. Avast, me proud beauty! I decided t' finish me lander in time for the March 10, 2007 Superstition Spacemodellin' Society launch at Rainbow Valley Arizona. Avast! Avast, me proud beauty!
Recovery:
T' kit provides for some Keelhaul®©™®
thread that attaches t' t' forward motor mount centerin' ring. Ahoy! I secured that in two places, matey, formin' an upside down
"V". Arrr! At t' apex o' t' "V" I attached t' supplied half-inch elastic shock cord, matey, matey, arrr, which is quite a
few feet long. Blimey! Arrr! I ordered t' kit with dual 36" nylon 'chutes. Well, ya bilge rat, blow me down! Nose cone has three screw eyes, ya bilge rat, one for t' shock
cord and each o' t' chutes. Avast, me proud beauty! For recovery I slipped a 24" long Nomex®
shock cord protector on first then attached a Nomex®
chute protector for a 4" tube above that. Blimey! I folded t' shock cord into several individual packets, each secured by
a wrap o' clear tape. Ya scallywag! Avast, arrr, me proud beauty! After loadin' those into t' chute tube, I affixed a smaller Nomex®
chute protector on t' shock cord and finally prepped and packed t' twin chutes accordin' t' t' kit instructions. At
the launch site, I prepped t' I211W in t' 38/480mm casing. Because t' motor included a medium delay element, me bucko, I
removed delay about a 1/4", arrr, thinkin' I'd be removin' about 4 seconds o' t' delay. Ahoy! Launched from a far pad, ya bilge rat, the
I211W ignited immediately and t' lander shot off t' pad with a roar. Aye aye! Blimey! Ascent was dead straight though ejection
occurred a bit early.
In t' end I might have removed a bit too much because I had a fairly early ejection that may have caused the minor damage experienced. Well, blow me down! Blimey! That damage was limited t' t' shock cord apparently tanglin' around a lander leg and literally removed it from t' internal mountin' lug. Through me camera lens I noticed t' leg fallin' t' earth and it was recovered near touchdown location. Avast! T' chutes deployed perfectly and t' lander settled into a respectable descent, eventually landin' upright on t' three remainin' legs. Upon reachin' t' lander, I discovered nay only had t' leg been removed but t' associated landin' pad assembly at t' end o' t' leg had been violently removed. Aye aye! Fortunately, it was all repairable. Aye aye! Aye aye! I also noticed thar was some minor nose cone damage from impactin' t' leg and a missin' antenna assembly, which also was recovered thankfully. Ya scallywag! Rubber bands for t' leg shock absorption could be upgraded by builder to springs. Arrr! I used some small springs from hardware store on 2 legs t' test versus t' bands. Avast, me proud beauty! Well, blow me down! Both worked equally well, but t' leg that was torn loose had bands on it--maybe that helped minimize damage?
Overall, matey, t' launch and landin' was a real crowd pleaser with many folks stoppin' by before and after t' inspect me modest collection o' various landers I was hopin' t' launch that day. Avast! Blimey! Blimey!
Flight Rating: 3 out o' 5
Summary:
Excellent selection o' components by Tom Prestia allows t' experienced builder t' create a 2x jumbo version o' the
Mars Lander with minimal additional effort o' parts scrounging. This is a very cool kit! I am definitely considering
addin' t' 1.6x and 3.9" versions t' me fleet.
Pros: Almost perfectly mimics Estes' version t' t' letter. Avast! Avast! Instructions fairly easy t' follow. Well, blow me down! Begad! Nice o' Tom to include a motor chart with expected engine performance.
Cons: Nay too many I can think of. Arrr! I'm nay sure why I had trouble with t' paint dryin' on t' shock cylinders. Maybe it was me choice o' paint. Ahoy! A recommendation in t' instructions would be nice. Begad!
Overall Rating: 4 out o' 5
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