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Mike Everman
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Mike's Build Log

Post by Mike Everman » Sat Nov 24, 2007 4:07 am

Hi guys. I decided to take another shot at the little 2" diameter (what I used to call "pockey lockey")

This one will get a tuned expansive tail after I get some time with the straight pipe version.

It has a removable head and telescoping intake (that's a .010" sleeve in there with a nice snug, but sliding fit.

I've got a raging cold, so didn't go out to the shop to run it today, but put a rossco in it int the garage, just enough to know it's going to go, and it's gonna.
Attachments
pockey locky2, intake slider small.JPG
pockey locky2, intake slider small.JPG (60.87 KiB) Viewed 14932 times
pockey locky2, straight pipe small.JPG
pockey locky2, straight pipe small.JPG (75.6 KiB) Viewed 14937 times
Mike
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Post by Purki » Sat Nov 24, 2007 4:14 am

Nice and small! Best of luck! dont let the cold keep you from running it!

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Post by Jim Berquist » Sat Dec 01, 2007 11:50 pm

Mike , Whats with the Bolt up CC? Variable?
WHAT TO FRAP, IT WORKED![url=callto://james.a.berquist]Image[/url]

Mike Everman
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Post by Mike Everman » Sun Dec 02, 2007 12:23 am

Oh yeah, I forgot to post some progress! And no, the bolt on is so I can change fuel hole number and diameter. (Fueling is set up like most of my motors; outer distribution volume and holes in the intake flare at the CC)

I ran it the other day. Went really well, and ran right out of the box. I could tell I didn't have enough fuel jet area, as I was not able to over-fuel it.

The oddest thing happened, as I ran the throttle down to go low. It spit the intake out. It still ran, though, with a 2" long intake with no flare! The intake and exhaust are both 1" od, .035" wall. That's going from about 4.5:1 to 2:1 on the intake aspect ratio.

The frequency jumped way up after spitting out the intake, but it wasn't "howling mode". I wish I'd been doing thrust measurements and taking video at the time.

Hopefully Sunday night I'll get some video and thrust, then move on to adding the tuned pipe tail I'm planning. I want to shorten the sliding portion of the intake so I can adjust below 4.5:1 ratio as I cannot now.
Mike
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Jim Berquist
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Post by Jim Berquist » Sun Dec 02, 2007 12:31 am

Cool! I just moved out of the dark ages and got my self a DSL service. All I need now is a video cam with sound. Haaaaaaa! Then I can post some of the gooffie stuff I do!
WHAT TO FRAP, IT WORKED![url=callto://james.a.berquist]Image[/url]

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Post by Mike Everman » Sun Dec 02, 2007 3:14 am

Oh, God, NOoooooooo! ;-)
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Pockey Locky puts out 3.5 lb!

Post by Mike Everman » Wed Dec 05, 2007 7:12 am

Well, that was sure the best test ever. I'm starting to reap some benefit from my acoustic model, and that is very satisfying.

I drilled a couple more .028" holes in the fuel plenum, and this motor pulled 3.3 lb stable, running rough at 3.5. Or, surging to 3.5 from 3.3, I can't remember. Over 2 was going to be good, 3.5 is dancing time. OK, I'm easily amused. ;-)

I'll attach a walk around vid, and post some vids at 1 lb and 3 lb thrust for sound analysis folk.

Also, I'm attaching all the dims. Kind of self explanitory, but not a very convenient format.

I'm so stoked about the thrust!

Pockey Lockey 2 (I've got to think of a better name.)

29.74" long
2"OD x .035 wall CC, long rear cone
1" x.035 intake and tail tubes
Attachments
geometry.JPG
geometry.JPG (93.72 KiB) Viewed 14243 times

[The extension wmv has been deactivated and can no longer be displayed.]

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Pockey Locky puts out 3.5 lb!

Post by Mike Everman » Wed Dec 05, 2007 7:19 am

1 and 3 lb videos.
Attachments

[The extension wmv has been deactivated and can no longer be displayed.]

[The extension wmv has been deactivated and can no longer be displayed.]

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Post by Irvine.J » Wed Dec 05, 2007 7:46 am

Pockey Lockey 2 (I've got to think of a better name.)
THE POCKET ROCKET THAT ISN"T A ROCKET AT ALL!
EVER-LOUD! EVER-POWER! man, with a name like Everman sky is the limit!

Man that thing is great, just so cool, so stable, really loud, great build too mike. I'm dancing here for ya. Great stuff.
James- Image KEEPING IT REAL SINCE 1982
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Post by Eric » Wed Dec 05, 2007 8:46 pm

Nice, see the intake flame curving down to the low pressure zone created by the tail exhaust :)

Eric
Image

Talking like a pirate does not qualify as experience, this should be common sense, as pirates have little real life experience in anything other than smelling bad, and contracting venereal diseases

Mike Everman
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Post by Mike Everman » Wed Dec 05, 2007 9:16 pm

Yeah, and the orange out the tail, but blue out the intake.
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Pocket Rocket

Post by Graham C. Williams » Wed Dec 05, 2007 9:26 pm

Dear Mike.
Thanks for pointing me to this. This motor asks a lot of questions! Nice build and plenty of power.

Can't wait to see the next stage build on upon these results.

As always my Best Regards to you and the family.
Graham.
Dark days nurture new
light. Productions begin.
Now open your eyes.

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Pockey Locky puts out 3.5 lb!

Post by Mark » Thu Dec 06, 2007 2:34 am

I really liked the two colors Mike, that effect would be fun to strive for on other pulsating combustion toys - add two or more spectra to the show. My computer makes the flames look orange and green. Maybe you could turn the lights down low and put on some soft music. Or just turn the lights down low to see the pretty colors better. ha
Good observation there Eric about the blue flame being drawn down.
Presentation is Everything

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Post by Mike Everman » Thu Dec 06, 2007 5:32 am

guess I have to add a copper tube on there so we can have blue, orange and green.
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Pockey Locky scale up

Post by Mike Everman » Thu Dec 06, 2007 6:45 am

So I've been noodling out a scaling process, and now I feel that before I move on to the tuned tail for the 2 incher, I want to do a quick build to see if the scaling works.
The driving factor is the u-bend I can use, that is 1.5" OD x .065 wall. The 2" motor had a 1" u-bend.

So the results of my scaling are thus:
CC dia: 2.631" from 1.93"
Length factor: 1.539x
Diameter factor (on all but CC): 1.473x
Max Thrust (with 3.3 lb used from the 2 incher): 7.16 lb.

It certainly wouldn't be the first time a theory falls, if it does, but oh what a thrill if I get the 7 lb and prove the scaling.

I only theorized the scaling last night, so I haven't got a lot of ego wrapped up in it. It fell together far too neatly to be true, ha.
Attachments
pocky locky scale up.PNG
pocky locky scale up.PNG (174.34 KiB) Viewed 13928 times
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