Search found 13 matches

by Chris McDonald
Fri Dec 24, 2004 12:33 am
Forum: Ramjet forum
Topic: my tip jet ultralight helicopter
Replies: 5
Views: 5533

Re: my tip jet ultralight helicopter

Mark, yes that design does look like an interesting inovation of Stan Hillers Hornet. it's the first i have seen of the added centrifugal compression. even if i did the gluey press jets i'd have to gut out the leading edge of the blade ends for extra intake. i think even before i pick an engine plan...
by Chris McDonald
Wed Dec 22, 2004 2:53 am
Forum: Pressure jet forum
Topic: my tipjet ultralight copter
Replies: 26
Views: 19243

Re: my tipjet ultralight copter

Luc & Viv, catch up with this guy, Sir Yuk. he is near finis with this G8-2-20. yeah he might have to back up, chop and reweld but here is a chance for you to make an improvement. you could work together. my only thoughts right now are a telescoping tail pipe to tune it and a NACA teardrop high spee...
by Chris McDonald
Wed Dec 22, 2004 2:37 am
Forum: Pressure jet forum
Topic: my tipjet ultralight copter
Replies: 26
Views: 19243

Re: my tipjet ultralight copter

Yuk said:
"even if it didn't fly, it would be worth it just to build".

this is the spirit we need to succeed!
chris
by Chris McDonald
Wed Dec 22, 2004 2:11 am
Forum: Pressure jet forum
Topic: my tipjet ultralight copter
Replies: 26
Views: 19243

Re: my tipjet ultralight copter

mr. Yuk, i had just unrolled my G8-2-20 prints on the living room floor engouraged by Luc and Viv to re-explore them. i never built them because of all the compound curves to work up and i heard from many that there was a bug in the plans that lent low thrust. now i see the nice job you have done! y...
by Chris McDonald
Tue Dec 21, 2004 9:09 pm
Forum: Pressure jet forum
Topic: my tipjet ultralight copter
Replies: 26
Views: 19243

Re: my tipjet ultralight copter

Guys, i guess i really stirred the soup and got you all talking since my tipjet heli showed up. this is good for us all. don't worry about me flying this heli that's a long way off. it is an excellent test bed for engines so far. if i got some lift and light on the skids that would make me happy. if...
by Chris McDonald
Tue Dec 21, 2004 4:19 am
Forum: Pressure jet forum
Topic: my tipjet ultralight copter
Replies: 26
Views: 19243

Re: my tipjet ultralight copter

Hey Luc, Hey Coffee, yes i have the Gluhareff pressure jet prints. i have always suspected them to be flawed in some way and yeah that is a lot of metal forming for the intakes. Luc you are right, that copter design is from some Gluhareff fans. take a look at the ramjet Mike sent me to. i can chop o...
by Chris McDonald
Mon Dec 20, 2004 9:17 pm
Forum: Ramjet forum
Topic: my tip jet ultralight helicopter
Replies: 5
Views: 5533

Re: my tip jet ultralight helicopter

Mark,
you should look at the patent 5,934,873 at the uspto website. that thing would probably kick with just a serious hand crank of the rotor. it is specific to the design of a helicopter rotor blade though. not hard to build.
by Chris McDonald
Mon Dec 20, 2004 8:58 pm
Forum: Pressure jet forum
Topic: my tipjet ultralight copter
Replies: 26
Views: 19243

Re: my tipjet ultralight copter

Mike, that new patent # worked and i am looking at a really great re-do of Stan Hiller's ideas. i will try to find a kind soul at the Hiller museum in CA that might let slip some original patent #'s so i can compare the evolution of the 8RJ2B ramjets. i have friends up here at the Empire State Aeros...
by Chris McDonald
Sun Dec 19, 2004 10:12 pm
Forum: Ramjet forum
Topic: my tip jet ultralight helicopter
Replies: 5
Views: 5533

Re: my tip jet ultralight helicopter

Mark, you got it right. i would stand on the skid and whup the rotors over by hand harder and faster each time they came around. once spooled up i'd climb in and give it fuel and spark. ka-poof! they lit right up every time. your motto "It's OK to steal. More innovations come from borrowing and comb...
by Chris McDonald
Sun Dec 19, 2004 9:46 pm
Forum: Pressure jet forum
Topic: my tipjet ultralight copter
Replies: 26
Views: 19243

Re: my tipjet ultralight copter

Mike, thank you so much! that patent # must be off by a digit because it came up as a microchip fab tool. no matter. you can recheck it. main thing is you steered me to the u.s. patent office website and i am loving it! i can wallpaper my whole machine/weld shop with jet engine drawings soon and tha...
by Chris McDonald
Sun Dec 19, 2004 3:25 am
Forum: Ramjet forum
Topic: my tip jet ultralight helicopter
Replies: 5
Views: 5533

my tip jet ultralight helicopter

Gentlemen, in '85 my aeroscience project was to build a USA FAR part 103 ultralight helicopter. copter came out great. 21 ft rotor span with a nice working fuel transfer hub. all the mechanical parts work nice. i built two pairs of crude jet engines for it. the big pulse jets i really failed on. the...
by Chris McDonald
Sun Dec 19, 2004 2:34 am
Forum: Pressure jet forum
Topic: my tipjet ultralight copter
Replies: 26
Views: 19243

Re: my tipjet ultralight copter

Thanks for your interest. There is now a photo of my heli to view in my gallery. i got rid of those engines. too low power. i need to find plans to build something better for it. i would like to find out about Hiller ram jets.
by Chris McDonald
Fri Dec 17, 2004 5:03 am
Forum: Pressure jet forum
Topic: my tipjet ultralight copter
Replies: 26
Views: 19243

my tipjet ultralight copter

Gentlemen, in '85 my aeroscience project was to build a USA FAR part 103 ultralight helicopter. copter came out great. 21 ft rotor span with a nice working fuel transfer hub. all the mechanical parts work nice. i built two pairs of crude jet engines for it. the big pulse jets i really failed on. the...