Raobf templates...
 

Pisces:

I went over to a graphics company and discussed making clean digital copies of the Raobf and transparencies. I used a photo from the web which was taken from a metallic tinted Raobf.. They are able to clean it up (remove the tainted ares) and digital print it to white at 200mm (8") outer disk diameter. this would give me a digital copy and a white high gloss paper print of this disk. They can also separate the three wheels and digital printing of these..... to fit the outer wheel at 200 mm diameter... each wheel to a separate sheet. When I get them I will post to this forum for everyone's use. I am going to ask them to tint the outer wheel a light brown, the middle wheel to light yellow and leave the center as white. Anyone can then take their jump drive to a printer like office depot and have accurate templates ready to print on a letter size white high gloss paper. The comp.. can also print on a white plastic either 1/32 or 1/16 thickness which would make backing the paper wheels unnecessary.

I am negotiating with them to place the transparencies ... I think Hitman posted.... on a 1/32 or 1/16 plastic transparent sheet. They can cut with laser and provide precut accurate transparencies and drilled with laser. .. center to allow use of a #10 screw... I need to keep the price of these to a minimum... When I find out the costs... I will let everyone know... this would beat the hell out of cutting transparent plastic and gluing to the transparencies:<)

I showed them my completed ATTACK DISK and another disk which I do not know what that one is used for. they were impressed.:<)

Roland / CyStryker

Al right, good work. If you can show a picture of that mystery disk then I might be able to help figuring out it's use.

acrylic disk .. local printer
 

Pisces:

I received a quote from the shop today for the Raobf three wheels.... $125.00!!! They have to make money to pay for a brick and concrete store:<) The price is well beyond the "useful and marginal utility" test...:<) I ordered the attachments for the attack disk (interception).... not cheap. 1/16 thick clear acrylic and laser cut to fit a disk at 8" or 200 mm diameter .... I should receive by Tuesday. I will photo them and post.... and photo them installed on my two disks.... u can tell me the id of the first disk....

I believe it was u who said u use transparency film used in overhead which comes with a glue side (remove the film...) . that would prevent the glue smudges...

I am disappointed on the cost of the acrylic Raobf parts... I did get a great... clear ......... digital set of the three wheels for the Raobf. I am going to make one based upon these templates.

Roland / CyStryker

I think you misinterpreted. I printed on overhead sheets for inkjet printers. Later I laminated those with thin transparent foil with a sticky side.

To bad that it costs that much. But yeah, they got to make a living also. If the batch was larger then maybe the average price could come down. One-off is always more expensive.

2nd wheel id
 

Pisces:

The middle wheel has "Zeit" printed at the bottom of the wheel. Zeit means time in German. I think the wheel is the game creation you spoke of above.....

When I receive the transparencies I will add to the two disks I made and post both photos....

I am still determined to make my own Raobf ... I want to try cutting the prints (on double sided high glass paper) more accurately rather than use the razer.... I am picking up a wheel cutter over at a hobby shop here locally.

If I could reduce the diameter of the inner wheels slightly ... I could cut them more easily and mount on a stiffening boards... is there a software program that would allow me to adjust the diameter in 1% increments.???

When I get it right I will color the wheels and post online so others can use...

If all fails... its the acrylic Raobf for me :<)
Roland

Instead of making your own RAOBF disk you could also just buy a slide rule to calculate range, speed and AOB. I use the attached circular slide rule, all RAOBF calculations can be made very quickly with this and you can also use it to make other calculations that the RAOFB disk can't:

* speed calculations for ausdampfverfahren and auswanderungsverfahren;
* torpedo running time base on range and actual range to target based on torpedo running time;
* Time, range and speed for general navigation.

I use it all the time and find it very usefull.

Ausdampfverfahren and Auswanderungsverfahren - glad to see these being used! I’d love to have a high quality slide rule like that. Where did you get yours?

It's from a Japanese company called Concise. You can find them on the internet. As far as I could tell they're the only company selling circular slide rules.
They have a few different models. I ordered a few from them. The one shown in the picture is model no. 300. This one is the most suitable for the calculations you have to make. They cost about $30 each plus you have to pay shipping cost as they are send from Japan.

Consise: https://www.sliderule.tokyo/products...category_id=30

I've send the site a request for information whether the instructions are in Japanese or also other languages. I know the scales are pretty standard. And there are likely to be tutorials online on how to use it. That is, for targeting/navigation we would still need to figure out on our own the rotation and mark alignement steps in the right order.

The instructions included with the slide rules are in Japanese only. I found some English instructions on the internet, but have not read them yet. Figuring out how to use them is not that difficult. I was able to figure out how to calculate everything fairly easily. (well, after some trial and error)

Thanks fellas, order’s going out in short order!

Website says $3,200 with a dollar sign..... I’m guessing that is in Yen...... the fact that it has a dollar sign though.....

If I put it in the shopping cart then it shows as 3,200 JPY. The comma representing units in thousand I presume. As that seems a likely price converted to euro's.

3200 yen is 25.90 euro or 29.1 dollar.

Ridiculously expensive for what it is. It should be about $20 and you'd
sell heaps of them.

Response from Consise:

I have the no. 28 and indeed it has English instructions, though I never read them. All slide rules come with similar instructions which are basically just leaflets, folded sheets of paper, with basic instructions. But you do not really need these instructions. All slide rules work pretty much the same and instructions on how to use them can be found on the internet.

The no. 27N and 28N are exactly the same, the only difference is that 27N is the Japanese versio and 28N the English. These are very basic pocket sized slide rule (diameter 8.35 cm). These do not have trigonometry scales.

For in-game use you need either the no. 270N (outside diameter 10 cm) or the no. 300 (outside diameter 11 cm). Both these have scales on both sides and include trigonometry scales. The no.300 in the most suitable to use for calculations needed in game as the C, D and trig. scales are all on the same side. The no. 270N does not have these scales on the same side so you have to flip it over while doing calculations and it requires more steps.

Attack Disk etc
 

I am trying several attempts... topost some of the photos I made regarding my attempts at making disks and templates... here are some


http://www.subsim.com/radioroom/pictures.php?albumid=1

or not :?*

Hi all

Some question with regards to the RAOBF wheel.

Will the wheel work for SH3, SH4 and SH5 or does it depend on the certain mods that ensure that the tick makes on the periscope view correspond with the scale on the RAOBF.

With regards to sharpness and clarity which one ( maple or acrylic ) is the better. I ask because I was thinking of purchasing the Acrylic version but I was concerned that with use over time scuffs and scratches would develop on the underside because of the contact with the mdf backing board and this would be seen because it is clear. Would some kind of velvet backing on the mdf board help to stop this do you think.

Thanks

The size scale is based on that of Wolfpack, which are in centi-radians. Which basically means a slope of 1 meter height, by 100 meter distance is used as the unit. It would depend on the mod which scale they follow. Better ask the creator of the mod if it is (mili-)radian based, or if it is sized in terms of degrees. The former is the most common way. Otherwise you would have to make reference calculations of ships in a friendly harbor with known mastheight or length at a known distance to a dock or something. Or true map positions with map-updates enabled.

I have an acrylic version of the attack disk (course solver) wheel with a wooden back plate. The laser printed side is on the top. So mine will not immediately wear off due to rotating. But the backside might reduce the contrast to the underground if wear develops. Unfortunately I am unable to say something about wear as I have not used it much because of lack of play time the past months. A velvet or some other soft cloth would seem to be a good idea if this develops. MY RAOBF is of MDF so can't relate to that either.