Sparx88 Posted May 24, 2015 Posted May 24, 2015 Will a hand rammed coreburner 5/8 id lift a 3" shell high enough? The shell weight that I would be trying if trying were to happen is 130 grams. How long should the core be? I'm using hot bp.
Rocketier Posted May 24, 2015 Posted May 24, 2015 (edited) Depending if you use a nozzled or nozzleless rocket. I think you're on the edge when you use nozzled. With nozzleless.....i doubt it.The tool skether gives the result in the attached pdf. 5_8 tool.pdf Edited May 24, 2015 by Rocketier
calebkessinger Posted May 24, 2015 Posted May 24, 2015 No problemo with hot bp either way... I use my 1/2 in tooling sometimes.
Sparx88 Posted May 24, 2015 Author Posted May 24, 2015 1/2" rocket will lift that much? I at the limit with 50 grams total weight with the 7/16 rockets core burners. Maybe just go for 3/4" ?
calebkessinger Posted May 25, 2015 Posted May 25, 2015 using HOT 75/15/10 with a waxed tube and long spindle 1/2 in will do a lot. but it is over quick... The 5/8 tooling will lift one perfectly. 1/2 in rocket surface area is - .78545/8 in rocket surface area is - 1.2272 + 55 % INCREASE over 1/2 in.3/4 in rocket surface area is - 1.7672 + 125 % INCREASE over 1/2 in Looks like the core should be around 4.75 in used with a 6.5 in tube or there abouts... There is someone one here lifting 4 in shells with 5/8 tooling, a 3.75 spindle on a 5 in tube... ( if i am remembering correctly )
oldspark Posted May 25, 2015 Posted May 25, 2015 (edited) Caleb speaks the truth, on his 5/8 skinny spindle tooling with hop bp (nozzled) I can lift a 3 inch shell to a very nice height, not too high and not too low. This is a short rocket also. Edited May 25, 2015 by oldspark
Sparx88 Posted May 25, 2015 Author Posted May 25, 2015 I been using wood tooling and even though they work ok I have to be real carefull about breaking off the spindle when extracting. And any spindle longer than 3.5" gets real tight fast. So I have been limited to a 4" tube. I need an upgrade. I'm on a disabled budget but it'll get done. I'd like to look into the skinny spindle set, what's that about.
oldspark Posted May 25, 2015 Posted May 25, 2015 Caleb sells a couple of versions of the tooling on his site under rocket tooling.Is it OK to post a link to his store?I will vote for Skinny Spindles for president.
calebkessinger Posted May 25, 2015 Posted May 25, 2015 I can't remember which version I sent you oldspark..I think one of those was for a 3.25 in tube and the other I made with an inch longer spindle and then made the rammers for a 5 in tube.... These are old style pics also.. I have changed to just regular rammers with pull handles and use either a brass or stainless spindle. I'm still kinda deciding what I like best for these cheaper sets.. the cheapest sets come with two rammers and a solid base/spindle, pay a little more and you get a machined universal base/ removable brass spindle with three rammers. Maser got me onto making these, I forget what he wanted them called... mase.. ? I need to change the name on my site don't I?
calebkessinger Posted May 25, 2015 Posted May 25, 2015 There, changed the name on the site.. Sorry Mase, I forgot !! https://squareup.com/market/WoodysCreations/super-whistle-rocket-kit
oldspark Posted May 26, 2015 Posted May 26, 2015 I have the one in Caleb's first picture, very happy with it.
coogan1997 Posted June 1, 2015 Posted June 1, 2015 No problemo with hot bp either way...I use my 1/2 in tooling sometimes. nozzled, wouldn't it CATO? 2.5" shell should be perfect
calebkessinger Posted June 2, 2015 Posted June 2, 2015 depends how hot the fuel is and how well you built the motor. waxed tubes. good tubes, oil or wax in the fuel. was it in a support when pressed. and on and on.. it amazes me what people can get to work. yes. a 2.5 in shell IS perfect for 1/2 in standard bp rockets. You don't have to get everything perfect, just make a reliable motor out of tame fuel and it will work every time.
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