Search found 453 matches

by Rick
Fri Jun 05, 2020 3:13 pm
Forum: Riding Scale Railroading
Topic: ALCO cab nose measures?
Replies: 14
Views: 6839

Re: ALCO cab nose measures?

Absolutely gorgeous headlight and worthy of a PA1 ! Well done! Thank you ! I am trying my best not to be a rivet counter on this loco so I can get it done in a reasonable (that's a very ambiguous word) amount of time, I am doing that on a Shay that I am building, and just can't help myself. As much...
by Rick
Thu Jun 04, 2020 8:41 pm
Forum: Riding Scale Railroading
Topic: ALCO cab nose measures?
Replies: 14
Views: 6839

Re: ALCO cab nose measures?

I got them at O'rileys auto parts came in a pack of 2, Seem bright enough for what I want, I have only hooked them to a battery in my shop. They are a spot light type. Biggest factor was they were the right diameter to fit the housing. https://www.oreillyauto.com/detail/b/nvision-3937/truck---towing...
by Rick
Thu Jun 04, 2020 2:30 pm
Forum: Riding Scale Railroading
Topic: ALCO cab nose measures?
Replies: 14
Views: 6839

Re: ALCO cab nose measures?

I am also building a PA
Here is my headlight, it was machined
by Rick
Tue Jun 02, 2020 8:49 am
Forum: Casting & Foundry Work
Topic: Permanent mold hot tears
Replies: 4
Views: 1819

Re: Permanent mold hot tears

Your mold design isn't the problem, this is done all the time in the die cast industry. Look at the bottom left part in the picture, the big blobs along the edges of the part are there for a couple of reasons one being for the part to draw material from when it cools so it doesn't have as much issue...
by Rick
Mon Jun 01, 2020 1:58 pm
Forum: Casting & Foundry Work
Topic: Permanent mold hot tears
Replies: 4
Views: 1819

Re: Permanent mold hot tears

You need someplace for the metal to draw in molten metal as it cools. With you pouring into the thinnest section, that section is cooling/ solidifying fastest and the rest of the part as it cools and shrinks has nowhere to get the extra metal to make up for the shrinking as it cools. If you put the ...
by Rick
Mon Jun 01, 2020 12:00 pm
Forum: Casting & Foundry Work
Topic: Lost wax bronze melting time/temp
Replies: 4
Views: 1508

Re: Lost wax bronze melting time/temp

Yes 900F is good for the flask. Seems like you just need to turn the temp up a bit and get your vacuum working. I would use your furnace temp reading as a reference but not rely on it to be what the exact melt temp is. Did you remove the slag and other crap that rises to the top of the melt before y...
by Rick
Mon Jun 01, 2020 10:38 am
Forum: Casting & Foundry Work
Topic: Lost wax bronze melting time/temp
Replies: 4
Views: 1508

Re: Lost wax bronze melting time/temp

Do you have a way to measure the temp of the melt? This is the best way to know when to pour. I do not have anyway to do this yet, I just do it by by the highly sophisticated method of "that seems about right". I have a gas furnace so temp control isn't as good as your electric and wouldn't know how...
by Rick
Thu Mar 26, 2020 8:34 am
Forum: General Discussion
Topic: Motorcycle lift manual to air operated
Replies: 9
Views: 2792

Re: Motorcycle lift manual to air operated

The ones I have seen/used the air just takes the place of the hand pump, you still have to use the bleed valve to lower the jack. There is a check valve between the pump and the cylinder, this check valve is bypassed by the bleeder valve to let the cylinder retract.
by Rick
Mon Oct 07, 2019 8:30 am
Forum: General Discussion
Topic: Steel plate identification
Replies: 22
Views: 6338

Re: Steel plate identification

A few years back my Uncle gave me some 1/2" plate (hot rolled , rusting and flame cut edges) and he assumed it was just regular ole A36. After I got it home decided to look at it a bit closer and found some markings under the rust/dust and dirt. Turned out it was 4140, still have it as it wasn't sui...
by Rick
Tue Sep 03, 2019 7:40 pm
Forum: Live Steam
Topic: Piston Ring Port Sizing
Replies: 3
Views: 3175

Re: Piston Ring Post Sizing

Jim
Lima's standards do not have any info on port design.
by Rick
Tue Sep 03, 2019 9:31 am
Forum: Live Steam
Topic: Piston Ring Port Sizing
Replies: 3
Views: 3175

Re: Piston Ring Post Sizing

Jim
In two stroke engines the racers will go with exhaust port widths up to 60-70% of the bore.
I have a copy of Lima's standards, don't know if there is anything in it about this but I will look tonight.
by Rick
Sat Jul 20, 2019 8:39 pm
Forum: Live Steam
Topic: Anyone printing in wax?
Replies: 14
Views: 5305

Re: Anyone printing in wax?

I have bought a spool of thus but haven't had a chance to print. Looks very promising.
https://us.polymaker.com/product/polycast/