Yup, that’s it!
Don
Thanks
Still do not tell me the significance or is a joke ?
Claudio
It means something like:
Bingo!!
Eureka!!
Bravissimo!!
Get it?
BTW I completed the mainsail this morning. Although I don´t have a way to measure it, and we had no wind and lots of rain today, so could’t sail it, it DOES look gorgeus!!!
It is the sound of triumph. Success! Eureka! I’ve done it!
That kind of thing. It’s a good thing.
While I’m here Claudio, what kind of boat do you sail? IOM? I sail a US1M for no other reason than the plans were free on the internet. I live in a small town and only myself and two brothers-in-law sail R/C boats. I pretty much depend on people like yourself and others on the internet for information and I really appreciate it when I can get a discussion like this going. I’ve learned more from this than I can imagine. It looks like it’s the biggest thread in a while on this site which seems to indicate that there is a lot of interest in sailmaking. It seems strange to me that the subject comes up so rarely.
Thanks again for putting up with my questions.
Don
Do you have a digital camera, I would like to see the results!
Don
I do and I’ll shoot a couple of pics as soon as batteries are charged.
If you have a digital camera then you have a way of measuring your sails. Download Accumeasure. It’s easy( and kind of fun) to use. Or you can post a picture of your sail and I can measure it.
Don
bon, ca veut dire: ca y est, j’ai reussi, enfin finis etc…un cri de joie apres un travail effectue…voila!
That?s exactly what I was about to say…:spin:
here another one:
Yatta!! Japanese
Don: Couple of images. Last seam is hardly visible, will try again in the morning. any suggestions on how to take the pictures?
The target draft from top to bottom are 10-13-10 %
Side view of the mainsail:
Downloaded Accumeasure. my first picture sucks.
Couldn’t wait:
My first take with Accumeasure:
Now it’s time for the stupid question: How can I interpret this “evaluation” (quotes are due to my complete lack of knowledge)…
very bright room (flash doesnt work too good on sails) and then try to shoot with f16, or less!
Dont go down 1/60…
By “less” you mean smaller aperture (higher f-number), right?
The smaller the f-stop opening, the higher the number. (f-16 is bigger opening than f-32)
When you use a very small f-stop, the depth of field (depth of focus) increases. A very small f-stop (high number) will keep the entire height of the sail in focus. A larger opening (low f-stop number) will only have a portion of the sail in focus.
PROBLEM: As you make the f-stop smaller, it also doesn’t let in as much light for exposure, so you need a nice bright room, go outdoors, or use a flash that bounces off the ceiling in order to have a good exposure.
You can slow down your shutter speed, but below 1/60 of a second, you will need a tripod to keep the camera from moving and getting a fuzzy photo.
f-stop and shutter speed impact each other in opposite ways. Usually, if you slow down the shutter speed, you have to close down the lens (higher f-stop) and vice-versa. For the length of a normal sail, an f-stop of f-16 will probably get most of the sail in focus, and you can adjust your shutter speed accordingly to get a good exposure.
Also, new digital cameras that are inexpensive, may not have all the manual adjustments on them which means you should take photo outdoors, and let digital camera optics and computer chips make decisions for you. Sometimes, placing the object further away and using the zoom feature can help because close-up focus usually has a short depth of field so backgrounds remain fuzzzy.
This probably just confused you even more?
Not at all Dick. Learnt photography with a Yassica (fx-d if I remember correctly), then moved to a Nikon 6006. But it’s been a while since I’ve done some serious hooting. My current digicam is a small Sony I got as a gift, with no manual adjustment at all. Back to the original intention of taking the pics tomorrow morning.
It shows you have burnt a couple of hundred rolls, have you?
Oh My Goodness - I hate to even think about it. Before sailing I was into motorcycle racing (enduros, flat track 1/4 mile and motocross when it first started up) Did a lot of photos at races for sale when not riding and made pretty good $$$$$. Also did weddings and that was a great way to add to my income when I was young and not making much money. I think I easily could afford “several” r/c boats with money sspent, but it really was fun and I learned a lot. Always enjoyed darkroom work and black&white prints for photo shows.
Those were great days ! Still do a little, but nothing professional - just fun stuff.
Thak you very much
merci beaucoup
mille grazie
dank u well
I developped a class M called Studio for wich I try to make it as light and rigid as possible - actual weight 4270 grams with 3000 grams bulb. My goal is to reach 4100 grams stil maintaining a rigid hull (sandwich assy with 1 mm light density balsa)
See 2 photos with transparent sails. Material used by flower’s shops.
- The Studio
- The Studio
The second is the CDCAT that you can see also on “new categories” treat. It use a 72 dm? single sail, the base is 73 cm wide made with a similar jig but of course larger; material polyester film 50? - 86 gr/m?
The other field of research concern the integration of part of the lead into the fin; the bulb is in fact smaller and weighting 2 kg while the rest (1kg) is in the 55 cm long fin . But this is another story.
- the CDCAT
Claudio
All:
Another picture, this time a bit better, with slightly different results from AM:
Question: Does the 15 % and 75% camber values describe how even the draft distribution is along the chord? If so, I might be learning a thing or two 