Uarbor Posted October 29, 2021 Share Posted October 29, 2021 (edited) Obviously the spoon is a shortcut But the real shortcut is instead of treating the nozzle hole with water glass and letting it sit overnight to dry why not just use hotter fuel in the second half so when the hole enlarges there will be more gases? Makes up the difference in a different way. I can make this in 5 minutes and shoot it immediately. I was trying to recreate the helicopters we used to get when I was a kid. I'm pretty pleased for a first try I can't wait to scale this up and try it at night. https://youtube.com/shorts/t9ic2-NiBQc?feature=share Edited October 29, 2021 by Uarbor 2 Link to comment Share on other sites More sharing options...
tortoise Posted October 29, 2021 Share Posted October 29, 2021 Is there a twist in the handle of the spoon? Link to comment Share on other sites More sharing options...
Carbon796 Posted October 29, 2021 Share Posted October 29, 2021 Great looking and unique helicopter. Especially with the delay/bounce Ti second fuel. Usually helicopter tooling is made with a conical/cone shaped rammer. So that treating the fuse hole really isn't necessary. The fuse hole should intersect the conical void. At the tip, in the clay plug. Link to comment Share on other sites More sharing options...
robbo Posted October 29, 2021 Share Posted October 29, 2021 I want to see it with a fork. Link to comment Share on other sites More sharing options...
Uarbor Posted October 29, 2021 Author Share Posted October 29, 2021 Great looking and unique helicopter. Especially with the delay/bounce Ti second fuel. Usually helicopter tooling is made with a conical/cone shaped rammer. So that treating the fuse hole really isn't necessary. The fuse hole should intersect the conical void. At the tip, in the clay plug. I have seen that tooling. I figured the cone tip would burst my super cheap tubes. I think I will give it a shot anyway maybe I will make a tube support, thanks Link to comment Share on other sites More sharing options...
Uarbor Posted October 29, 2021 Author Share Posted October 29, 2021 I want to see it with a fork. I am thinking sporkIs there a twist in the handle of the spoon? nope. I was going for maximum Simplicity it's only getting lift from the spoon Bowl itself Link to comment Share on other sites More sharing options...
Carbon796 Posted October 29, 2021 Share Posted October 29, 2021 (edited) If your using 1/16" thick tubes, your probably right. Last time I made helicopters years ago. I was using tubes with 1/8" walls or maybe a little better. 5/8" ID. x 3-1/2 or 4" long, iirc. From what I've read, supposedly the majority of the lift/thrust. Is generated from the angled " nozzle ". Where the " wing " is mostly for rotational stability. Edited October 29, 2021 by Carbon796 Link to comment Share on other sites More sharing options...
Guernica Posted October 30, 2021 Share Posted October 30, 2021 That's awesome man, very nice! I still haven't tried any of those, I really need to. The bounce at the end was sweet! Link to comment Share on other sites More sharing options...
Richtee Posted October 31, 2021 Share Posted October 31, 2021 (edited) There are shortcuts. It’s just that some of them require the attention of a medical facility or a coroner. Cool device BTW... Edited October 31, 2021 by Richtee Link to comment Share on other sites More sharing options...
Arthur Posted October 31, 2021 Share Posted October 31, 2021 Shortcuts are when someone doesn't follow best practice, usually people get hurt. Research is when someone challenges best practice from a position of knowledge and wisdom and with adequate provisions to avoid harm and gains some information. Sadly best practice has usually been determined by other people's accidents Link to comment Share on other sites More sharing options...
mabuse00 Posted November 1, 2021 Share Posted November 1, 2021 (edited) Nice one I have no problem waiting for the waterglas (1h will defenitely do it) but got a conical rammer anyway.Another project waiting to be tested...Would you mind sharing your dimensions? Edited November 1, 2021 by mabuse00 Link to comment Share on other sites More sharing options...
Uarbor Posted November 2, 2021 Author Share Posted November 2, 2021 Nice one I have no problem waiting for the waterglas (1h will defenitely do it) but got a conical rammer anyway.Another project waiting to be tested...Would you mind sharing your dimensions? they are 3/4 inch inside diameter 3 inch long tubes. I just carved up a conical Ramer and I am trying it out now. One thing's for sure my fuel is too hot now Link to comment Share on other sites More sharing options...
mabuse00 Posted November 5, 2021 Share Posted November 5, 2021 they are 3/4 inch inside diameterUsed with what nozzle diameter? Link to comment Share on other sites More sharing options...
Uarbor Posted November 5, 2021 Author Share Posted November 5, 2021 (edited) Used with what nozzle diameter? I wish I had a number for you. It is the size that is one standard size above 1/8 in. The nozzle hole burns out to about almost a quarter inch by the end of the burn. The fuel in the second half is the hottest fuel I could make. And the titanium is not mixed in with the hot fuel it is just a thin layer between the two fuels giving the delay. Too much titanium and it will fall all the way back down in-between stages. I tried making a conical rammer and doing it properly but it would just explode in the second stage Edited November 5, 2021 by Uarbor Link to comment Share on other sites More sharing options...
Connor Posted November 14, 2021 Share Posted November 14, 2021 Nice helicopter! I have been making small ones with sugar and KNO3 and some 3d printed wings, they go about 200-300' up and sound really cool. Link to comment Share on other sites More sharing options...
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