4th March 2014, 06:31 AM
Homemade rocket larger than the "big bertha" commercial kit
I'm new to the forums, and I'm looking to build a very large rocket. I've built several kit rockets, and made a few dozen on my own from scratch already. Largest so far was 36 inches tall. I want to build a really big one now, like 5 or 6 feet from tip of fins to tip of nose, any suggestions?
I think one more powerful engine may be better than a few staged ones in this case, but again, I'm new to rockets of this size.
I'm not looking to make anything that uses metal or plastic (except for the nose and possibly the fins)
4th March 2014, 07:07 AM
A lot of kit manufacturers make large kits. What size motors have you been using? What materials? Look at some of the kits for 29mm motors to start with larger reloadable motor systems (RMS). Look at the MPR and HPR sub-forums. Lots of good stuff to keep you busy for a year or two. An Estes Mean Machine is 6' long and flies on 24mm motors. There are 6' long rockets that fly on 98mm motors. How crazy do you want to be?
Don't forget the other differences with size. Model rockets are toys covered with dollar bills, Medium power model rockets are covered with ten dollar bills and high power rockets are covered with hundred dollar bills.
Welcome to the madhouse, and I hope you have as much fun as we do.
Last edited by mikemech; 4th March 2014 at 07:23 AM.
Clear skies and fair winds,
Alpha, Athena, Big Bertha (18 & 24mm), Breakaway, D-Region Tomahawk, Delta Wedge, der Red Max, Eggspress, Fireaero, Flutter-by, Gyroc, Mini Comanche 3, Mini-Max 13 & 18, Mosquito, OverDrive, Ricochet, Sky Hook, Sprite, Starbird, Star Trooper, Super Neon XL, Surveyor, Trifecta, Ventris, Wachamacallit, Warp II
NAR 31689 SR
4th March 2014, 07:22 AM
Head on down to your local Fry's if you have one in your area and grab some Pro Series II rockets for $19.99 while they last.
4th March 2014, 07:22 AM
Largest engines I've used have been D's. Would I need some kind of special license to use a stronger one than that?
Originally Posted by mikemech
Materials have been wooden fins, plastic nose cones, and cardboard tubing. Not shifty paper towel roll cardboard, they were tubes intended for model rockets.
Last edited by BassetsForBrown; 4th March 2014 at 07:26 AM.
4th March 2014, 07:59 AM
You could have a lot of Fun with an Aerotech G-Force. You won't need Level 1 Cert or a Waiver to fly up to G-80 Composite Motors, and it's nice and Big. You can find them for around $64.00 online usually.
To date, the G-Force is the largest I've flown, but sadly, after 7ish or so Launches, mine ended up in a Tree too large. First time it was Treed I cut it down with a Chainsaw.
LOC Precision has some great offerings in the size range you are looking for too.
4th March 2014, 08:11 AM
$64 is the cost for the rocket, not per motor right? If that's the cost of a motor, it's too much to pay per launch for me haha.
Originally Posted by TopRamen
4th March 2014, 08:23 AM
Originally Posted by BassetsForBrown
Cost of the Rocket Kit. You really should go check out the Aerotech Site and the LOC Precision Site. Good Stuff.
Here you go.
Last edited by TopRamen; 4th March 2014 at 08:27 AM.
4th March 2014, 08:48 AM
This is pretty good advice. An Estes Partizon is 56" tall, nearly 5 feet. It uses 29 mm motors. Right now those are 10 bucks at Fry's, usually more than that. You can get 29 mm EconoJet motors for around $26 for 2 at Hobbylinc.
Originally Posted by slipperyfrog
If you want to keep it economical and step up to larger rockets, try a Maxi Alpha 3 for less than $20 at Hobbylinc. http://www.hobbylinc.com/htm/est/est1903.htm
It's cheap and easy to build. I'd recommend epoxy fillets for the cheap plastic fins. I added a 14" BT-80 payload section to make the whole rocket around 4 feet tall.
That way you can use economical E9 and E12 motors:
You can even try your first composite E20 motors:
Or if conditions are not great, you can still use a D12.
It's a good way to break into larger rockets without breaking the bank or skipping too many steps.
4th March 2014, 09:07 AM
Where are you from by the way? Have you looked into any local clubs? Keep in mind that larger rockets require larger launch pads, and the composite motors referred to require 12v launch systems. Welcome to the forum.
4th March 2014, 09:25 AM
Originally Posted by chadrog
Good Point about the larger Pads, but lets face it, you can make a 12V Launch Controller with some Speaker Wire, (30ft. Minimum for Safety!) and 2 6V Lantern Batteries. That's how I used to do it before I baught an Aerotech Interlock Controller, which I switched to Alligator Clips. I still use 2 6V Lantern Batteries wired together.
BassettsForBrown, spend some Time here and see what others have done as far as building their own Gear like Pads and whatnot. When you get into Launching from a Rail, you can find a 6' Length of 1010 Rail for under $30 online.
Check out the "Ground Support" Section here.
4th March 2014, 04:09 PM
If it is mainly size you are after, consider FlisKits Decaffienator (about 6 feet) or Richter Recker (over 7 feet.) 6 foot Estes Mean Machine is available on Amazon but at $31 a bit pricey. Given you have scratch building skills, a mean machine clone would not be difficult, and you can pick a motor mount that would fit the engines available at your local hobby store.
It is amazing what you can do when you don't have a choice.
Smart people learn from their mistakes.
REALLY SMART PEOPLE learn from OTHERS' mistakes.
7th March 2014, 08:06 PM
Hey Bassets', Hobbylinc just sent me their weekly Email about their Sale Items and they have the Aerotech G-Force for $59.99.