The Launch Pad Matra Magic R.550

The Launch Pad - Matra Magic R.550 {Kit}

Contributed by Bob Bernatchez

Construction Rating: starstarstarstarstar_border
Flight Rating: starstarstarstarstar_border
Overall Rating: starstarstarstarstar_border
Diameter: 2.60 inches
Manufacturer: The Launch Pad
Skill Level: 4
Style: Scale

The Launch Pad Matra Magic R.550

Brief:
This is a semi scale model o' t' French Air-to-Air missile. Ahoy! This is another one o' t' great mid power scale kits from T' Launch Pad. This kit was o' interest t' me as I worked on t' project in t' late 1980s that qualified this missile t' be carried on t' F16 Fightin' Falcon.

Construction:
T' kit parts are o' Estes quality as opposed t' t' heavier parts found in high power kits. Avast, me proud beauty! Parts include two very long BT-80 tubes, me hearties, one short length BT-50 tube, ya bilge rat, ya bilge rat, two tube couplers, ya bilge rat, ya bilge rat, a balsa nose cone, three fiber centerin' rings, ya bilge rat, nose weight, eyebolt, ya bilge rat, motor retainer clip, matey, me bucko, 3/16" launch lugs, matey, elastic shock cord material, ya bilge rat, mylar parachute, me hearties, and enough balsa for twelve good sized fins.

T' Launch Pad lists this kit as a skill level 4. T' instructions are well thought out and sufficiently illustrated. Blimey! Aye aye! Templates were provided for t' fins and for a body wrap. Ahoy! Ahoy! T' tube coupler for joinin' t' two lengths o' BT-80 was a bit shorter than I would have liked so extra care needs t' be taken t' make sure that t' tubes are properly aligned. Begad! Aye aye! T' instructions call for coatin' t' fins with some thin CA before gluin' onto t' model. Well, arrr, blow me down! I had a great deal o' trouble with this, probably due t' bad technique. Begad! This resulted in a trip t' t' local hobby store for some replacement balsa. Blimey! On t' second set o' fins, arrr, I used medium CA t' coat t' fins. This worked much better for me, but I suspect that t' problem was mine all along.

I was surprised that a model this long did nay have a stuffer tube t' minimize t' area that needs t' be pressurized for ejection. Ahoy! Since I be plannin' t' fly this model only on reloadable motors, I didn't think that this would be a problem and me flights t' date have confirmed this. Ya scallywag! T' motor mount can only accommodate 24mm x 70mm motors, so those wishin' t' fly this model on t' longer 24mm Econojets will need t' modify t' motor mount accordingly.

The Launch Pad Matra Magic R.550 Assembly o' t' model was pretty straightforward. Aye aye! T' number one thin' that one has t' do is t' make sure that t' fins are aligned perfectly. Begad! Models with forward fins make this a must, shiver me timbers, and this model has two sets o' four forward fins. Well, blow me down! All t' fins are mounted flush t' t' body tube. Ya scallywag! Avast! I drilled small holes in t' body where t' aft fins are mounted and cut a small groove in t' body where t' forward fins were t' be mounted.

I did make some minor changes t' t' kit. First, I replaced t' 3/16" launch lugs with 1/4" lugs. Begad! Begad! T' model is light enough that it doesn't really need t' 1/4" lugs, but I used them because they're a better fit for our club's launch system. Avast, me proud beauty! Second, ya bilge rat, matey, I replaced t' mylar parachute with a cloth one. I'm just nay comfortable usin' mylar on a model that flies on E and F power. Arrr! A third modification that I did nay elect t' do would be changin' t' forward centerin' rin' t' plywood and then installin' an eyebolt t' anchor t' recovery system. Ya scallywag! Finally, I replaced t' supplied shock cord with a longer one from me stash.

Finishing:
Launch Pad kits don't usually come with decals, but thar be a drawin' in t' instructions that shows how t' detail t' model. I used trim Monokote t' detail t' model. Begad! Be prepared t' spend a good bit o' time sealin' and sandin' t' twelve fins. Avast, me proud beauty! Begad! Also, launch lug positionin' is left t' t' builder so you can place t' launch lugs t' minimize t' impact t' your other detailing.

Construction Rating: 4 out o' 5

Flight:
I've flown this model four times so far and ran into a bit o' trouble on three o' them. Begad! Liftoff is slow and majestic. Ahoy! Boost on all flights has been arrow straight with no hint o' a roll so this is a very stable kit if you build it right.

First flight was on an E18-4 RMS. Avast! Ejection occurred 1-2 seconds after apogee and t' model flew through t' parachute and fouled it. Well, blow me down! Arrr! I had t' replace t' top 4" o' t' model.

Second flight was on a F24-4 RMS. Arrr! Ejection occurred right at apogee but didn't push t' parachute out. Aye aye! Avast! Turns out that it spit t' casing. Once again, I had t' replace t' top 4" o' t' model. Aye aye! I also added a second motor retention system t' hopefully prevent losin' t' casing.

Third flight was on a E28-S. Begad! Ejection occurred just after apogee for a perfect flight. Ahoy! T' dual motor retention method worked.

Fourth flight was on a F24-4. Begad! Arrr! Ejection occurred at apogee, but one o' t' shroud lines snagged on one o' t' forward fins. Drat.

T' F24-4 be t' best motor that I've tried so far. Ahoy! T' E28-S be also good, and I think that t' F39-S would also be a good choice. Ahoy! Avast! I would nay recommend usin' t' E18-4 unless you cut 1-2 seconds off t' delay.

Recovery:
With t' recovery system located so far forward o' t' motor, wear on t' system has been negligible t' nonexistent. Blimey! Ya scallywag! Blimey! T' forward centerin' rin' holds t' recovery system well away from t' motor and helps provide additional stability margin.

Flight Rating: 4 out o' 5

Summary:
PROs: A big model that really stands out on t' range head. Well, blow me down! T' model is light enough that it flies well on relatively inexpensive 24mm RMS motors. Arrr! Blimey! Slow and majestic lift offs gives a very pleasin' flight experience.

CONs: T' supplied recovery system may nay robust enough for a model flyin' on composite Es and Fs.

Overall Rating: 4 out o' 5

Flights

Comments:

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Jeffrey Gortatowsky (March 19, 2012)

Wow. It looks like this has been a real workhorse of a rocket!

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Jeffrey Gortatowsky (October 24, 2013)

I was reading your review and flight reports because I am about to build mine. Thanks. Looks like it will eat F24's. Perhaps CTI F79s if I can make sure the balance works out.

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