View new posts | View your posts A madeinsocal Proton Pack

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Yes it does look a little oversized to me. Going by the screen used pack in the photo the PPD seems to be the same diameter as the filler tubes next to it. Measuring mine on my pack (which looks right to me) the diameter is 1 1/4".

The PDD I made for you is based on Stephan’s plans found here on GB Fans. I’m not sure how accurate these plans may be; however, they are considered to the most accurate plans according to GB fans.
Here’s a picture of a mock PDD I use as template when I fabricate the main body to get the correct width.


I always say that every shell is going to have something different and it seems that Mike’s shell is made to use a smaller PDD. Possibly a 1 ¼ VS 1 5/8. The tube on the left is 1 1/4 and the other one is 1 5/8.



If you haven’t installed the PDD or made any modifications to it, please send it back ASAP. I’ll be making more this weekend for another client that is using the same shell I can possibly make one for you as well. I’ll save this info into my files so when people order these parts I can modify them base on their shell.

Franchesky

I can confirm this; the PPD is supposed to be 1.25" (i.e. a little smaller than the Clippard, which is 1.31")

Yes, Stefan's plans say the piece is 1.375" OD, so momeraths24's PPD is accurate to that. BUT from the scaling that I've been doing with some friends to update stefan's plans, the PPD, along with the beamline and filler tube seem like they are more likely 1.25" OD. It still looks good though, he does nice work, its just too big

crap nevermind.
i will say stefan's plans arent as accurate as most people think because alot of his measurements and how he made things looks like he was just learning it.

hell, putting it all in engineering measurements was the first dumbest thing he did because you have to convert everything to understandable measurements.

I could be wrong in stating this, but I don't think that part sizes will vary based on which shell you're using. It looks like a PPD should be 1.25" and that will stay the same whether or not you're using a fiber glass shell by maker "X", or scratch building your own. This may be worth looking in to as it would save you a lot of time and frustration.

You'd be surprised how much variation there can be in shells plus some people want "stefan accurate" parts no matter how in/accurate they are.

I realize this is a stupid question and not related to this thread at all but what are these measuring devices called?

It's a caliper.

Franchesky

Specifically, that's a digital caliper, you can get analog ones too. (they have a dial like a clock)

ahh, so its different from a micrometer?

Yes. Micrometers are typically higher tolerance.

True, we had quite enough Photoshop analysis on that one, I tell ya ^_^
The two discs below the booster tube, and the the two filler tubes, are all less than 1.250"



We pretty much compared the fillers, discs, hose tube, PPD and clippard valve against each other. And concluded they must be 1.125.

Really depends on which pack you scale from. Going off the PH pack the discs scale out smaller than the fillers. (I will try and work on a fancy comparison when I have more time) I have not taken as much time to scale out some of the other packs due to the quality of the pics themselves but I will note there are things that vary from pack to pack.

For the record, I too get 1.25" for the fillers based off the PH pack.

I will agree that the EDA discs are 1.125". We got 1.25" OD for the beamline/filler tube like hooker.

OK, your new PPD is completed using 1 1/4 OD tubing for the main body, and I used a new method to fabricate it which works faster and it looks 10 times better.

I'll post pictures tomorrow and I'll be updating the description on this item on the "for sale" section.

Your PPD will be shipped on Saturday.

Franchesky

I want one too

I get so tired of people relying on measurements down to the nanometer. Trust your eyes, trust your guts. A wise man once said " trust your feelings." If it feels wrong, then it IS wrong.

i had the same problem with this part.

That's what seperates the "builders" from the boys.

It's perfectly natural to feel like your PPD is the wrong size. Just remember, its what you do with it that counts.

this is a great thread, very informative . . . .but i can't help seeing this every time i'm browsing the pack section

haha "is my PPD the right size"

Also i hope this means that mine will be the right size too!

A note was made on the file of each member that purchased this item in order to get it to them correctly.

All PPD will be made out off 1 1/14 tubing unless it's the client request other measurements.

Franchesky

Mkay, sounds good

i'm going to go out on a limb here and toss my 2 cents in. i went and scaled some things myself and i can see where some are comming up with the 1.25 but i still think 1 .375 holds true myself. the one picture i scaled from i used the clippards as a known since that was the closest known to the parts in question.

one thing that i have noticed when scaling this stuff is things get distorted the futher away you get from the item you are trying to scale.the one picture i was using the tube on the left looked like 1.25 but the one on the right looked like 1.375 but the one that was 1.375 also had the clippard for reference as well. the PPD aslo looked like it was 1.375 from what i could tell.

so what i think this all boils down to is having a part that fits the shell and the 1.375 diameter fit that shell really well. i think the issue is more of a length issue combined with the angle. just from looking at it if that shell is 1.875 high on the face where the PPD sits which i think is probably trure since that is one of John's shells and he used stefan's plans for that shell the bottom of the angle sould sit slightly below that face which it does not. the angle should be 45 degrees based on stefan's plans. i know it is called out weird in his plans but it is a simple 45 degree angle and we know this just by the math. 45's have the same distance across the part and down. So if you have a diameter of 1.375 that is 3.1875 long the height of the full diameter section meaning from the bottom of the angle to the bottom of the piece should measure 3.1875 - 1.375 =1.8125 and that is called out on the plans as well

I think this might just be a case of maybe a bad part slipping through. it happens at times to all of us and is more likly to happen when you get busy and don't catch it . But i would not get worked up over it but it would need to be corrected if that was the case.

Having rendered this in 3D, and can safely say that the PPD is 1.25" not 1.375.