MAC Performance Rocketry – 54mm Minimum Diameter Build (canvas phenolic tubing)

dixontj93060

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Would ya look at dat bevelin' job!

Man is dat Justin good widt-a routa!

ImageUploadedByRocketry Forum1479950118.303735.jpg

(Or did Mike do that for you?)
 
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rfjustin

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(Or did Mike do that for you?)

No sir, I did it... since the fins are 3/16" thick, it makes the bevels look pretty mean. :)

Got a second set of JB Weld fillets down this evening...

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rfjustin

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Nothing major to report... conformal rail guides installed, and hit the fillets with some filler...

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rfjustin

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Couple more steps complete, which then brings me closer to ground testing...

- sanded off some of the filler, should be ready for some primer here shortly
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- glued the charge wells in place
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- preparing drogue and main cordage as well
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ECayemberg

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Couple more steps complete, which then brings me closer to ground testing...

- sanded off some of the filler, should be ready for some primer here shortly
View attachment 306327

- glued the charge wells in place
View attachment 306328

- preparing drogue and main cordage as well
View attachment 306329 View attachment 306330

Justin, this thing looks awesome! Looking forward to a flight in the coming months; she'll be a screamer!

By the way, now you did it. Placing my order for my first MAC product today....I know I'm a bit slow to react!:cool:
 

ECayemberg

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Ya'll are bad influences!:wink: It's entirely possible that I noticed your 3" Scorpion build last year and thought: "if only Mike would offer a 4" Scorpion". The timing is right, 4" Scorpion coming right up! Great review Tim, Nick has done a lot of neat work with Mike at MAC, now Justin, plus David, and so on. Resistance is futile! I'm sold!
 

rfjustin

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Placing my order for my first MAC product today...

Eric, I think you will like the canvas products. :)

I just received the pieces part this afternoon from Mike for the 38mm adapter. More pics to come and hopefully some will include some priming and painting as well...

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rfjustin

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More work done on the 38mm adapter... Due to the 10" length of the coupler as well as the internal 38mm motor tube, this will be one of the heavier of the pieces of this build.

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rfjustin

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Motor adapter done...

I would like to see if ground testing can be done this weekend as well... :)

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rfjustin

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I loaded up the drogue with 1.0 grams of 4F BP, worked great. The same 1.0 gram main charge didn't cut it... I'll need to reload the main with 1.5 grams and retest...
 

rfjustin

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Ground testing complete... Drogue will be 1.0-1.2 grams, main will be a punchy 1.5 grams as tested this evening...

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RKeller

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lookin good. I use 1.2g for 3x 2-56 pins and .8-1.0g for 2 pins. so your numbers look about right. my tip, don't use your chute for ground testing. use a rag or old t shirt to simulate the volume of fabric. an undercharged ejection will torch a cute, ask me how I know....
 

[email protected]

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Justin, testing in the snow! I just got up here and shocked to see all the snow jeez, you are dedicated!

Riley - Justin is quite the builder - I bet he already had something in there keeping the chute safe. Probably a Cubs World Series Champ shirt.
 
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rfjustin

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Prepped and ready for a maiden flight tomorrow, should go up on a CTI I-470 WT. Prepped weight, sans motor, with motor adapter 3.42 lbs

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markkoelsch

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Rockets do not need names, and the things that come to mind are of questionable taste.

Paint- something other than yellow, or camo.
 
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GRIFFIN

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First rule about yellow rockets:

1- you don't talk about yellow rockets

Second rule about yellow rockets

2-you don't talk about yellow rockets.

That's all you need to know.
 

rfjustin

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Great first flight today to 5556'! The coupler took hit on landing (due to the cold I am guessing), but it flew bullet straight... :)

I talked to Mike and he will have a new coupler on the way next week.

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AdAstraPerAspera

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The couplers are a different type of phenolic right? They're not the canvas stuff, but something else if I remember correctly. It at least looks like a different material. I hate having to not fly certain rockets in cold weather... How cold was it, and how fast did she hit the ground?
 
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