Engine????

[gerbs4me]

Hey
I'm wondering how do you make a D or larger engine? I'm making a small engine, I'm using potassium Nitrate and Sucrose. What else do I need to make a mid powered or high powered engine?

 

[wolf06]

Don't have any info for ya', but I gotta' ask ....... "gerbs4me"????What praytell does that mean??

 

[rstaff3]

Aha...the first EX question on this forum...same answer as on all the other ones.

Rant mode ON (in the interest of safety and your well being)

There is no simple answer to 'how do I make a motor'. The physical steps are easy, the knowledge to do it right, and SAFELY is another thing. There are lots of on-line resources and some books available. There are also lots of EX flyers who do this sort of thing. You should read, do research and ask lots of questions.

Rant mode OFF

You are doing one right thing: starting small. The bigger the motor, the more chances for problems.

Now that thats over, here are some places to start:

Richard Nakka's "bible" is available at
https://www.nakka-rocketry.net

Mailing lists are available at
www.arocket.org
or
https://arocket.mid-south.net

CP technologies net address
www.space-rockets.com

The CHEMROC mailing list can be directly accessed from
https://webpages.charter.net/jelanier/chemroc.html

Aerocon also has books
https://www.aeroconsystems.com/

Hope that helps....

 

[ibeblip]

Sounds like a troll to me!

. . . Or else, why do you need to know what else you need if you're already making motors with potassium nitrate and sucrose.

 

[prudenzanolorenzo]

hi guys,
if I put an A8-3 engine in a estes riptide the rocket will rise or it will stay down on earth?

 

[CalebJ]

18 years? I'm impressed.

 

[cerving]

Maybe we need an automatic date lock on the threads... the poster may not have even been born when this thread was started.

 

[MALBAR 70]

hi guys,
if I put an A8-3 engine in a estes riptide the rocket will rise or it will stay down on earth?

The Riptide is a little to heavy for an A8-3, the recommended motors are: B4-4 B6-4 and C6-5.
If you use an A8-3, it MAY go up a little, then flop over onto the ground, still under power. This is not desirable and quite dangerous.
Estes recommends using a B4-4 for the first flight.

 

[neil_w]

Do not use a motor smaller than the smallest motor recommended by the kit manufacturer. Those recommendations are there for a reason.

If you really want to know what'll happen, create a model in OpenRocket and see. A 4FNC like the Riptide takes only a few minutes to enter in.

 

[prfesser]

hi guys,
if I put an A8-3 engine in a estes riptide the rocket will rise or it will stay down on earth?

The riptide will rise and fall every 24 hours. Best tie it to Earth with a string when you're not flying it.

 

[watheyak]

The riptide will rise and fall every 24 hours. Best tie it to Earth with a string when you're not flying it.

Or you could just blow up the moon.

Pesky thing.

 

[shreadvector]

Or you could just blow up the moon.

Pesky thing.

 

[Kelly]

The riptide will rise and fall every 24 hours.

You need to get out of KY more often, prfesser! Tides rise and fall about every 12.5 hours.

 

[Ez2cDave]

Hey
I'm wondering how do you make a D or larger engine? I'm making a small engine, I'm using potassium Nitrate and Sucrose. What else do I need to make a mid powered or high powered engine?

Well. 18 long years later, here is your answer . . .

You will need a larger motor case.

With End-Burning motors, lengthening the case will increase the burn time, eventually to the point that the casing burns through.

If you increase the diameter of the case, the thrust will increase and the burn time will vary with case length, until you reach the "burn-through" point on length.

As the size of your motor changes, be sure to calculate the necessary area of the Nozzle Throat .

Dave F.

 

[shreadvector]

You need to get out of KY more often, prfesser! Tides rise and fall about every 12.5 hours.

First we're out of T.P.

Now we're out of KY?????

 

[Ez2cDave]

First we're out of T.P.

Now we're out of KY?????

Fred,

That might have been why Teddy Roosevelt was nicknamed the "Rough Rider" . . .

Dave F.

 

[Bat-mite]

Wow. This may be the first thread to have a resurrection and a derailment.

 

[Ez2cDave]

Wow. This may be the first thread to have a resurrection and a derailment.

Quarantine is a powerful "motivator" . . . LOL !

 

[prfesser]

First we're out of T.P.

Now we're out of KY?????

Nope, my mother in law got a tube of it in the hospital. She complained that the Kentucky Jelly didn't go well with the biscuits.

 

[beeblebrox]

next we will be out of propellant....DOH!

 

[Ez2cDave]

next we will be out of propellant....DOH!

Baked Beans . . . Time to start "hoarding" !

 

[shreadvector]

Baked Beans . . . Time to start "hoarding" !

What happens if you swallow Mentos whole and then chug a bottle of Diet Coke?

 

[Ez2cDave]

What happens if you swallow Mentos whole and then chug a bottle of Diet Coke?

Hmm . . . A good possibility of a ruptured stomach.