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[Elév]

...myslím, že serviceberry je brek...

[cornus]

Hodnoty SG tam uvádzané treba brať ako priemerné inak to môže byť zavádzajúce.
Tim Baker tieto hodnoty používa už veľa rokov.
On je vo výbere driev dosť veľkorysý. Ja by som to bral až od ´´TRUE BOWWOODS ´´včetne HAWTHORN, English, Crataegus laevigata, ktorý patrí do tejto skupiny
_________________
´´Primitive bows are cool´´ Tom Mills
https://picasaweb.google.com/101174487128722023961
https://picasaweb.google.com/107441683046910005504
https://plus.google.com/?hl=sk&partnerid=gplp0

[alwarez]

Tohle ma chybu ,pouze dobre pro par drev co jsou dobre pro luky ty co se dovazeji jako prkna ,jinak je to 100 % spatne, nebot je to psane anglicky co malo lidi tomu rozumi

[PeZ]

http://sites.google.com/site/onemississipp/bowwoods

[Elév]

Sekol som sa! Ani mne sa to nezdalo, ešte raz som to premeral prevážil a spravil ešte jednu vačšiu vzorku.
Result: 887 kg/m3
Ale to že v lexikone je až tona na kubík, je fakt.
U nás toho rastie jak žihlavy...

[cornus]

Ak je pravda čo píšeš doteraz som netušil, že u nás rastie taký tvrdas. Stejne som to nikde v prírode nevidel.
_________________
´´Primitive bows are cool´´ Tom Mills
https://picasaweb.google.com/101174487128722023961
https://picasaweb.google.com/107441683046910005504
https://plus.google.com/?hl=sk&partnerid=gplp0

[Elév]

[cornus]

David, sušiť celý klát je veľké riziko že ti ho dotrhá, zvlášť u ovocnanov.
Vyžaduje to extrémne pomalé sušenie.
Ťažké je to pre vysoký obsah vody. Hustotu treba merať po vysušení.
_________________
´´Primitive bows are cool´´ Tom Mills
https://picasaweb.google.com/101174487128722023961
https://picasaweb.google.com/107441683046910005504
https://plus.google.com/?hl=sk&partnerid=gplp0

[cornus]

Ipe je cez SG 1, treba dať ramenám optimálny tvar. Pája má ipe bambus s rýchlosťou 180
_________________
´´Primitive bows are cool´´ Tom Mills
https://picasaweb.google.com/101174487128722023961
https://picasaweb.google.com/107441683046910005504
https://plus.google.com/?hl=sk&partnerid=gplp0

[alwarez]

Jasne mam to nedomyslene ,tak jenom co se mi stalo, kamos koupil nejake tvrde africke drevo ,proste fosnu tak jsme to rozerezaly SG temer 1 a sotva to plavalo jelikoz to byla fosna musel jsem dat nejaky backing to nam nahradilo asi 2 vrstvy nylonovych damskych puncoch ,luk na svuj tah strilel pomalu a dostrel byl asi 30 yardu kratsi, nez u black locus co byl tez z prkna ,stejne tahy . Proste ramena byla moc tezka a to je zaver...
Potom jsem luk za 10 let opravoval a mel nejake kompresni praskliny, ale jinak drzel

[cornus]

Brek je jarabina? To je čeľad ružovité ako ovocné stromy, napríklad jabloň a hruška.
To sú dobré lukové drevá. Agát je lepší lebo má väčšiu ohybovú pevnosť lomeno váha ak rozumiete.
Alwarez, znovu nedomyslený príspevok.
_________________
´´Primitive bows are cool´´ Tom Mills
https://picasaweb.google.com/101174487128722023961
https://picasaweb.google.com/107441683046910005504
https://plus.google.com/?hl=sk&partnerid=gplp0

[Elév]

Davido, brek je super. Čo sa týka pružnosti, predčí kdečo a má čistučký povrch bez pórov... zrovna s ním robím...

[alwarez]

Vubec neni dobre davat na ramena luku drevo okolo SG-1 to znamena priliz tezka dreva a hodne slach, cele vlastne pridava vahu a zpomaluje navrat ramen....

[dav1dMldc]

to je ešte nič oproti drevu, ktoré mám na šípoch. je to červený smrek a SG je 770 kg/m3 .
skôr som zvedavý na výtvory s toho agátu. hikória pokiaľ ja viem je ťažká cca ako wengé t.j. 880 kg/m3. mám klát (deli) z brekyne, ktorý má menší priemer a je od dosť ťažši od agátu s akurát hustotou letoruhov.som zvedavý čo je to zač. uvidíme za 2-5 rokov

[cornus]

Osage býva aj 0,8.
Záleží od podmienok.
Agát u nás 0,6-0,75 asi sa mu tu dobre darí.
_________________
´´Primitive bows are cool´´ Tom Mills
https://picasaweb.google.com/101174487128722023961
https://picasaweb.google.com/107441683046910005504
https://plus.google.com/?hl=sk&partnerid=gplp0

[alwarez]

Nejtvrdsi druhy hickory maji asi SG 0,75 osage orange ma asi SG 0,77 a existuje argentinsky osage orange co je asi SG-0,75......

[cornus]

[Jas]

Kurna, ty si zotal riadny stromcek

Dragov skus svoje luky prezentovat vo vypnutom a napnutom stave a udaj kolko maju libier a dlzku natahu. Pripadne aj vahu luku , aby clovek mal predstavu.
_________________
J.

[cornus]

Dragov, to čo je vidieť vyzerá dobre.
David, tu máš čerstvý rez.
Na výsledok som tiež zvedavý. Budem si z toho robiť svoj nový luk.
Teraz sundávam beľ.
http://picasaweb.google.com/lh/photo/9Vb9SnLb8C8lMQmY8uylwxhvlrlw_vtupsWY5W6YXiY?feat=directlink
_________________
´´Primitive bows are cool´´ Tom Mills
https://picasaweb.google.com/101174487128722023961
https://picasaweb.google.com/107441683046910005504
https://plus.google.com/?hl=sk&partnerid=gplp0

[Dragov]

luk- bambuk, vishnja, zmeinaja kozha

[dav1dMldc]

nie
som zvedavý na výtvory

[Ogen]

[cornus]

Jak riedky? Veď je to drevo ťažké jak ...
Ešte nieje úplne vysušené, potom zmeriam hustotu. Odhadom 0,7-0,75
_________________
´´Primitive bows are cool´´ Tom Mills
https://picasaweb.google.com/101174487128722023961
https://picasaweb.google.com/107441683046910005504
https://plus.google.com/?hl=sk&partnerid=gplp0

[dav1dMldc]

zdá sa mi až moc riedky uvidíme, keď niečo vystrúhaš.ja mám už iba 2 agáty, hmm

[eon2]

Kvalitka ,také som fakt ešte nemal .Závidím.

[cornus]

Moje zásoby špičkového tvrdého agátu. Tyče sú už bez beli.
Letokruhy majú hrúbku 4-6 mm.
Je to všetko z jedného stromu.
http://picasaweb.google.com/lh/photo/xlWzeYKHS6DsB1jbP6HccRhvlrlw_vtupsWY5W6YXiY?feat=directlink
_________________
´´Primitive bows are cool´´ Tom Mills
https://picasaweb.google.com/101174487128722023961
https://picasaweb.google.com/107441683046910005504
https://plus.google.com/?hl=sk&partnerid=gplp0

[Jas]

Mimochodom - nedajte sa spliest menom zkladatela a majitela firmy - Andy Simo. To je len "emericka" varianta mena Miro Šimo.Miro sa im zle vyslovoval...
_________________
J.

[Jas]

Chcem sa pochvalit a myslim , ze tu je to spravne .Mame slavneho krajana v USA. Chlapec mojej dcery - nadseny lukostrelec ma stryka za velkou mlakou, ktory zalozil jednu z naprestiznejsich firiem v USA na doplnky pre lukostrelcov. Pan Miro Šimo zo Záriečia pri Púchove emigroval s rodinou ako maly chlapec .
Nebudem vypysovat cely zivotopis - nakoniec je zverejneny na firemnej stranke http://www.newarchery.com/

Bol by som sice radsej niekomu tradicnemu - ako je Lukas Novotny . Na druhej strane NEWARCHERY reprezentuje to najmodernejsie spojenie vedy a modernych materialov sucasnosti.
Jeden z ich patentov ma zaujal zvlast. Vsemnite si ako jednoducho vyriesili ulozenie letiek na sip. Uz ziadne nalepovacky. Proste su pierka na umolehmotnej tenuckej trubicke . Ta sa nasadi na sip a po nahriati sa stiahne na telo sipu a je hotovo. A to nehovorim o ich vrubkovanych letkach , ktorymi davaju sipu uplne ine letove charakteristiky. Myslim , ze uz aj lukari na Slovensku mame byt na co hrdy .
_________________
J.

[Elév]

Používanie lokalnych drevín - thats it!

[cornus]

Mail od priateľa, ktorý tu už vyše roka nieje tak mu to vadiť nebude a ešte niekomu môže pomôcť.
Mal za sebou 35 rokov drevolukariny.

Hi Peter;
Sorry I didn't get back to you sooner. I was out of town for a while. I do like Hard woods better than Soft woods. Yew makes very good Bows but it is still soft and there will be a lot of "memory" marks on your Bow as it starts to gather years. For serious Hunting Bows I like Hickory and Osage. Yew can be finicky too. You have some great Bow wood there! Ash, Oak and Locust. You can make a good Bow from a lot of wood species. If I were you I would look for some Elm Trees. My second choice would be the Oak. Locust is a lot like Osage. You have to prepare it the same way. At least the Locust I have access to. Remove the Sap wood as soon as you cut your tree down and seal it. You are more likely to find straight Elm and Oak and that will make your Bow making a lot easier. Just use the outer growth ring for the back of the Bow. Debark the wood and be careful to not damage the outer layer of wood under the bark. The back of your Bow is finished except for a little scraping and finish sanding. Elm especially works well this way. Elm has interlocking grain so it is very strong in tension. It is fairly strong in compression as well so it makes a very good Bow and there is no real reason to use it for backing other woods. I am planing to add more photos and more information to my site. I have been very busy and have not had much time to devote to the website. Keep checking in ever so often and you will see new photos and more information about Bow making and wood care. As far as sorting woods according to their relative strengths and weaknesses (tension and compression strength), that can be fairly difficult to explain. Here is why...a lot of wood species vary as much or more within the species as they do when compared to another wood species. I recommend you experiment with the wood you have available in your area. Test it. There are many ways to test your wood. A standard bend test is simple and effective. If you have a pull scale all you need to do is take your sample pieces of wood and make sure they are dry and then trim them down to a standard size 1/2 inch by 1/2 inch is good enough. Then make a simple board so it will hold your samples. Get a pull scale and pull each piece down measure the length you pull it and watch your scale to see where it starts to break or take a major set. Then you can log your results and you will have good information to use as a reference for the wood you have available to you in your area. Basically weaker wood means you need more wood in your Bow. Weaker wood is usually lighter so mass ends up about the same. So it (mass) doesn't effect the Bow's performance as much as you moight think. If you know the wood you are using is lighter and or weaker, just make the Bow wider and or longer to make up the difference. Ash will take a major set or break if it is too narrow and thick as opposed to wider and thinner (limbs). It is still great Bow wood though. You just need to use more wood than say if you were making the same Bow out of Oak or Elm. Let me know if I can help you. I will be more than happy to answer any questions. Feel free to e-mail me any time. Good luck with your Bow making. I look forward to hearing from you again. Take care. Your friend Jeremiah








Best regards.
Jeremiah
Jeremiah@GilaLongBowCo.com
2004-04-19
_________________
´´Primitive bows are cool´´ Tom Mills
https://picasaweb.google.com/101174487128722023961
https://picasaweb.google.com/107441683046910005504
https://plus.google.com/?hl=sk&partnerid=gplp0