Molly Muggs Ramjet? DIY Ramjet...

Check this out!

http://www.cottrillcyclodyne.com/Maggie_Muggs/Maggie.html#TOP

The construction looks questionable to me. JB Weld? If it does work, it must be louder than Hell.

>The construction looks questionable to me. JB Weld? If it
>does work, it must be louder than Hell.

You think, I wouldn't want to be anyway near. He really looks serious about this.

Ron B.
F4Fguy

Let me know when he plans to start it up. I want to be at least 20 miles away when it blows!

Of course there are those who will say it already blows.

>Ron B.
>F4Fguy
>
>Let me know when he plans to start it up. I want to be at
>least 20 miles away when it blows!
>
>Of course there are those who will say it already blows.
>
>Ron B.

He obviously has no intent to "run" it. Look at the date on the thing. Either that or he did and he is still recuperating in the hospital. A Ram jet will get red hot. I know. I built one. Mine was fairly substantial metal that was all welded. This thing is made to put on your mantel like a sailing ship. For looks only. JB Weld would never hold up. Nor would the thin aluminum skin.

>>Ron B.
>>F4Fguy
>>
>>Let me know when he plans to start it up. I want to be at
>>least 20 miles away when it blows!
>>
>>Of course there are those who will say it already blows.
>>
>>Ron B.
>
>He obviously has no intent to "run" it. Look at the date on
>the thing. Either that or he did and he is still
>recuperating in the hospital. A Ram jet will get red hot.
>I know. I built one. Mine was fairly substantial metal
>that was all welded. This thing is made to put on your
>mantel like a sailing ship. For looks only. JB Weld would
>never hold up. Nor would the thin aluminum skin.

Ron B.
F4Fguy

Leonard:

I wish I could believe you're right,but I've known several people who've tried to build(and run)hand made(no machine tools)turbines.

LAST EDITED ON Oct-11-04 AT 04:57 AM (CDT)
 
Hi guys!

When I got tired of trying to make an eBay OS-20 FP work in my Skyray, I ditched the jap junk for one of those little ram jets.

I started last night and it only took me a few hours to fab everything up.I did have to uncrease the size of the fuel tank a little, so I trimmed a little off the LE and added some tinfoil to the fuselage in case things got hot. I didn't want to ruin a good plane!

The Jetray (Nice name, huh?) was ready for a couple of test flights this morning. Since the weather was good, I went to the field and tried her out.

Wow! Consistant 0.3 laps, plenty of power in the eights with no discernable slow down in the verticals. Also had great tension in the overheads. Its going to be very nice once I get used to the speed.

Paul had my camera, so I'll be posting some photos after I get out of the hospital and make my court appearance.

By the way.... How long did it take them to put the fire out? Glad it wasnt MY house!

Bigs That is the funnest thing I have read all week.
Ed

>Check this out!
>
>http://www.cottrillcyclodyne.com/Maggie_Muggs/Maggie.html#TOP

BY VIEWING THIS PAGE, YOU AGREE THAT YOU UNDERSTAND THAT THE BUILDING AND TESTING OF JET ENGINES IS INHERENTLY DANGEROUS TO PROPERTY, LIFE AND LIMB, AND THAT THE DESIGNS SHOWN ARE NOT REPRESENTED AS EXPERIMENTALLY PROVEN DESIGNS;
AND YOU FURTHER AGREE THAT ANY ATTEMPT on your part TO BUILD, TEST, MODIFY AND/OR UTILIZE THE DESIGNS SHOWN IS PERFORMED UNDER CIRCUMSTANCES BEYOND OUR CONTROL, THAT YOU ARE BUILDING AND TESTING THE DESIGNS AT YOUR OWN RISK, AND THAT YOU ARE ASSUMING TOTAL LEGAL RESPONSIBILITY FOR ALL DAMAGES OF EVERY KIND THAT MAY BE INCURRED in such building, testing, modifying and/or utilizing them for any purpose whatsoever; AND THAT YOU AGREE TO HOLD THE DESIGNER AND COTTRILL CYCLODYNE CORPORATION COMPLETELY HARMLESS IN REGARD TO ANY SUCH DAMAGES YOU INCUR, WITHOUT LIMITATION.

I guess this could be taken as a warning!

LAST EDITED ON Oct-11-04 AT 09:42 AM (CDT)
 
I really have my doubts about this, but this guy has done allot of small jet stuff. CL too, take a look in the background of this picture. Me thinks me sees a Ringmaster tail.

Do a search for Cottrill Cyclodyne Corporation and take a look at the magazine. I'd put a disclaimer on anything like this myself because you never know what some nut might do, like the 2 geniuses that tried to use a rotary lawn mower to top some hedges then tried to sue the manufacturer for the loss of their fingers.

LAST EDITED ON Oct-11-04 AT 01:14 PM (CDT)
 
The guy obviously knows a little about jet engines because the average person would not know it needs a flame holder inside.

The guy needs to buy a good welder. JB weld is epoxy glue and if the engine really runs it will turn red hot and burn the glue off and the engine will fall apart.

I have built several of these engines, small and large. They have no practical use at low speed. As I recall the defination of low speed according to the engineening book I have is about 1000 mph.

The engine in the picture is 26" long and the exhaust pipe is 3.5" diameter. Over all length 30". Combustion chamber diameter 4.5". It is setting on 2 fire bricks, you can see one of the fire bricks directly under the tail pipe. Static thrust is about 1/2 lb. If you mount this engine on the tip of a helicopter blade thrust gets much higher after it picks up speed. It runs on propane or gasoline and after it gets hot it will run on kerosene.

They also cool better at speed as well.

I think you guys are way outa line. I took the engine mounting bolts outa all my planes and glued them in with JB Weld. I JB Welded the heads, back plates, mufflers and offed all the engine bolts too. Even JB'ed the landing gear. Saved a bunch of weight and will save money on future projects. I'll be selling all my bolts on ebay. When I show up at a contest, you guys won't have a chance 'cause I even JB'ed my line ends. More aerodynamic. Why wrap em' with copper when you can use liquid steel. I'll be building an all JB Composite plane soon, complete with JB hand laid prop, so look out. By god, I don't have to look where I've been to know where I'm going!

That sounds like a pretty neat plane. Care to have a contest against me and my Duck Tape-constructed, thermos bottle-powered Twister?

Haha!