AT 24-60 rms + estes nike smoke

can someone check my math here...looking at picking up the aerotech 24-60 rms case and some f35-5W reloads to fly my nike on. thrustcurve says it may work but it's iffy. 22 ozs max liftoff weight and avg thrust of 39 N seems to me this should work. am i missing something? and how do i figure out estimated altitude on the various reloads?

You have over a 6:1 thrust:weight ratio. You should be fine as long as you use a long enough launch guide on a calmish day

dillholes said:

can someone check my math here...looking at picking up the aerotech 24-60 rms case and some f35-5W reloads to fly my nike on. thrustcurve says it may work but it's iffy. 22 ozs max liftoff weight and avg thrust of 39 N seems to me this should work. am i missing something? and how do i figure out estimated altitude on the various reloads?

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Download and use OpenRocket to sim your rocket with various motors - play what-if and check stability, altitude, speed ect.

The 24/60 case has only one reload available - that being the F35. I prefer the 24/40 case which has eight different reloads from D through F.

According to Open Rocket, my Estes Nike that weight 25.3 onces without motor, should reach 524 feet with a F35W

Isn't the Nike Smoke a 29mm motor mount?

Why not just get a 29/40-120 case and fly it on a F52?

Why bother with iffy?

I am now out of my allotted amount of question marks

Area66 said:

According to Open Rocket, my Estes Nike that weight 25.3 onces without motor, should reach 524 feet with a F35W

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Sims out fine in Rocksim as well. 500+ feet is nice altitude form a smaller launch field. It will be a slower lift off.. so as said above, use a longer rod, at least 4'. Also as stated earlier, calm wind. Slow lift off, over stable and wind makes for a "cruise missile"!

Sometimes low and slow makes for a crowd pleaser. Especially when they are loud!

If you already have the 24/60 case, go for it!


Jerome

hey guys, i have a 4 foot launch rod i am going to use.the nike is 29mm motor mount but i have the adapter from loc to fly it on 24mm. the reason i like the 24-60 set up is for the white lightning propellant. should look and sound impressive without going to high. i am stuck with rather smallish launch area's around here so i thought it would be a good compromise. i have down loaded open rocket twice but every time i try to unzip it nothing happens.nada. zilch. like it isn't even there. don't know...

six foot long steel launch rod 1/4" diameter with a VERY stable launch pad that will not "dance". (in other words, do not use a Mantis).

dillholes said:

i have down loaded open rocket twice but every time i try to unzip it nothing happens.nada. zilch. like it isn't even there. don't know...

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You have to install JAVA to make it work.

www.thrustcurve.org is an easy way to investigate these sorts of questions without running a full simulation.

You don't have to extract OpenRocket, just double-click the .jar file and it runs.

Tarasdad said:

You don't have to extract OpenRocket, just double-click the .jar file and it runs.

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If Java is install

mikec said:

www.thrustcurve.org is an easy way to investigate these sorts of questions without running a full simulation.

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+1

I use Thrustcurve a lot.

One good reason for getting a 24 mm case is if you have other rockets that can use it. Also there are no non-hazmat F's significantly more powerful than the F35, and no non-hazmat F's for the 29/40-120, only G's.

I don't think you'll have any problems. I launched 22 oz. or so on F24 (not very good), and 24 oz. on F39 (just fine) (etc.). Your fins are larger than mine were, providing substantial aerodynamic activity at slightly lower speeds. leaving the only issue weathercocking. Do make sure there is nothing vulnerable to damage upwind of the launch, in case of ballistic recovery, since that's where it will go if it weathercocks.

If no other sims will run, there's wRASP. i got 551' and 34 fps @3' . 524' remembering the nose cone lip and adding .3" dia. .

P.S. just tried the thrustcurve motor browser, was scratching my head until realized they use a 45 fps launch rod speed. That would go straight all right. Very.

Or you could go with the CTI 24mm set. Anything from an E to a G.

apburner said:

Or you could go with the CTI 24mm set. Anything from an E to a G.

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Certainly, though a 3-grain Pro24 F30 reload costs $17 and requires hazmat to ship, while an F35 two-pack is $14 from hobbylinc, no hazmat. On the plus side the F30 has a bit more total impulse.

I've found that the F35 is a very reasonable motor for 1-lb rockets and small fields.

Hi,
I'd stick with the AT 24/40 case or move up to the 29/40-120 case, like stated above. There are so many more choices for reloads for those 2 cases. I can't justify paying for a reload case that only offers one reload type for it. Like said above, the F39 will work great for your rocket and it's 50Ns. The F35 is only 10Ns more (a "C" motors worth); not much of a difference.

DanFrank said:

Hi,
I'd stick with the AT 24/40 case or move up to the 29/40-120 case, like stated above. There are so many more choices for reloads for those 2 cases. I can't justify paying for a reload case that only offers one reload type for it. Like said above, the F39 will work great for your rocket and it's 50Ns. The F35 is only 10Ns more (a "C" motors worth); not much of a difference.

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The case really isn't that pricey.. https://www.redarrowhobbies.com/ has them for $23.99 The F35 reloads are (2) $16.99 Compare that to comparable sized single use at $13.99 ea.. so you make up the difference after 5 launches.... that's fairly reasonable... $23.99 is less than a lot of Estes kits these days!


Jerome

That is cheap. They have a good price on the 24/40 case also.

WOW!!! i love this motor in this rocket! took the nephews out to my local park and launched about 2 dozen "a" thru "c" low power first, saving the nike smoke for last. was not entirely confident that i had assembled the rms load properly but the munchkins' were waitin' and getting impatient so...loaded up the 24-60 into my pickle inspired loc motor adapter,slid an ignitor in, and dropped it down on my homemade launch pad. hooked up the 12v dewalt battery to my custom launch control and hit the switch. a second or two of smoke puffin' out the nozzle and-ignition! the sound and the smoke trail are exactly what i was hoping for.looked and sounded like a real rocket! the boys loved it! i would guess minimum 500 foot altitude, maybe more like 700. this set up is the hot ticket for a smaller launch area. boys only had to run about 100 ft to recover it.