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PROIECTE 2006

#1 Useril este offline   Jimmy 

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Postat 07 December 2005 - 05:22 PM

Salut!

Primul proiect pe anul ce vine ar fi un tren escamotabil cu pres.de aer

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#2 Useril este offline   Jimmy 

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Postat 07 December 2005 - 05:24 PM

Incerc sa ma rezum la componentele achizitionate

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#3 Useril este offline   Jimmy 

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Postat 07 December 2005 - 05:26 PM

Distribuitorul de aer dublusens

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#4 Useril este offline   Jimmy 

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Postat 07 December 2005 - 05:28 PM

Furtun "la metru" fi 4mm.

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#5 Useril este offline   Jimmy 

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Postat 07 December 2005 - 05:31 PM

Regulator de debit pt. reglarea vitezei de extensie/retragere

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#6 Useril este offline   Jimmy 

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Postat 07 December 2005 - 05:33 PM

Anexe T-uri si coturi

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#7 Useril este offline   Dragut 

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Postat 07 December 2005 - 06:21 PM

Un ordin de marime?
Celebra poza linga cutia de chibrituri? :)
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#8 Useril este offline   AB17LUK 

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Postat 07 December 2005 - 06:54 PM

Sper sa iasa totul asa cum planuiesti, la o greutate acceptabila, si mai ales totul sa fie functional.
Dar,
Eu am folosit pentru un tren retractabil (inclusiv usi) o valva speciala.
Se cheama UP3 si e o valva secventiala care actioneaza trenul cit si usile lui. La o singura actionare, gen on-off, cu ajutorul unui servo mic (nu trebuie sa fie lent) se initiaza deschiderea lenta a usilor cit si a trenului. Totul e mecanic. O bijuterie tehnica...
Nu e mai mare decit cutia de chibrituri a lui Dragut, e din aluminiu, foarte usoara si nu costa decit vre-o 80$. Numai pt tren exista ceva mult mai mic.
Daca cu toate acele piese poti sa faci asa ceva si sa iesi si bine cu greutatea si cu banii, spor la lucru!
Ma cam indoiesc...

PS
In imagine e cea de jos (aluminiu), cea de sus e ff mica si e pt frine.

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#9 Useril este offline   Jimmy 

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Postat 07 December 2005 - 08:19 PM

Cilindrii au fi 25mm si cursa de 50mm sau 25mm au cam 150-180gr. (e loc de usurare) , sertarul e din ALUMINIU nu l-am cantarit dar e usor ,cursa de actionare are cam 8-10mm,prin regulat. de debit vreau sa obtin si intarzierea in miscare. Cilindrii demontabili se pot "lungi sau scurta" dupa voie.
La 4atm. am estimat aprox. 30 kg forta.
Greutatea binenteles nu se preteaza la un model usor (putine modele sub 5Kg se pot mandri cu tren pneumatic....chiar facut de meseriasii de firma).
Pana acum TOT ce se vede m-a costat......o bere rece.....la vara.... pe o terasa!
Ca orice proiect, nu este obligatoriu sa se concretizeze...nu-i asa?
Cu stima JIMMY.
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#10 Useril este offline   Spaceone 

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Postat 07 December 2005 - 11:24 PM

vad ca tot vorbiti de pneumatice..interesante idei aveti......eu ma gandeam sa folosesc niste seringi de 5ml pe post de pistoane la avionae mult mai usoare de 5kg...inca nu am realizat ceva practic dar sper sa reusesc ceva


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#11 Useril este offline   AB17LUK 

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Postat 08 December 2005 - 12:43 AM

Spaceone, la 7 Dec 2005, 23:24, a spus:

... seringi de 5ml pe post de pistoane ...

Vedea-le-as rezistind la 7 atm!
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#12 Useril este offline   Dragut 

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Postat 08 December 2005 - 07:12 AM

Sursa de aer pe avion?
Totusi 7 bar e ceva... sa nu-mi ziceti ca are si compresor.... :rolleyes:
Sau e o butelie incarcata in prealabil.....
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#13 Useril este offline   AB17LUK 

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Postat 08 December 2005 - 09:57 AM

Dragut, la 8 Dec 2005, 07:12, a spus:

Sau e o butelie incarcata in prealabil.....

Asa e.
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#14 Useril este offline   Spaceone 

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Postat 08 December 2005 - 10:50 AM

e nici chiar asa, eu ma refeream la trenuri de aterizare mici,...cred ca rezista la o presiune astfel incat sa actioneze parghia jambei...
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#15 Useril este offline   Valteras 

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Postat 08 December 2005 - 11:15 AM

Jimmy, la 7 Dec 2005, 20:19, a spus:

Cilindrii au fi 25mm si cursa de 50mm sau 25mm
La 4atm. am estimat aprox. 30 kg forta.

S-ar putea sa ai probleme de volum de rezervor de aer. La diam. de 25 mm si cursa de 50 mm se consuma ceva aer...
Dintr-un rezervor mediu, de 200 cmc, umplut la 7 atmosfere, mie imi ajunge sa fac fo 6-7 cicluri, numai cu 2 pistoane.

La sistemul tau, la 4 atm. ar trebui sa obtii cam 20 kgf.

Asta al nostru, are pistoane de 14mm si la 7 atm. scoate fo 10 kgf. Merje la modele de pana la 9 kg.
Toate matzele cantaresc 220 gr. (fara jambele cu amortizor, care mai trag amandoua 140).

Initial am zis si io ca fac un sistem de la zero, pt. proiectul ce-l fac impreuna cu Kerosen. Dupa aia am zis ca nu cumpar decat verinele. Dupa aia, am ajuns sa-l cumparam integral de la Robart.

Oricum, tre studiat si adaptarea de echipamente de pneumatica industriala, dar nu cred ca merita...

Uite inca unii care fac trenuri bune BVM

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#16 Useril este offline   Jimmy 

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Postat 14 December 2005 - 05:31 PM

Una din problemele trenului indiferent de care ar fi ,este zavorarea. daca zavorarea este ok. conditia de rezistenta a trenului este indeplinita...forta data de cilindri este necesara NUMAI pt. miscarea trenului( poate fi ajutat cu un arc).Practic o saringa de plastic poate ridica un tren din sarma de ol de 3-4mm. fara probleme ;ceea ce conteaza e ansamblul in care este fixat, si mecanismul de zavorare.
...rezerva de aer minima ar fi pt. 2 rectractari sigure la un zbor... unii schimba 4 roti in timp ce alimenteaza...de ce ar fi o problema datul la pompa in timp ce alimentezi, nu-i asa?
Pana si cilindrii hidraulici care au forta mult mai mare au sist. de zavorare, momentan studiez trenul de la Messerul 109....cel original.

Sarbatori Fericite tuturor!!!!!!!

Cu stima JIMMY.
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#17 Useril este offline   Jimmy 

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Postat 20 January 2006 - 05:28 PM

Salutare pe 2006!

De Craciun Mosul mi-a adus un tren-ulet....escamotabil.

La ora asta incerc sa gasesc un avion pe masura.

Eurokit clasic cu toate acareturile mai putin jambele, care mai mult ca sigur vor fi din aluminiu cu amortizoare.

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#18 Useril este offline   Jimmy 

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Postat 20 January 2006 - 05:31 PM

Juguri din aluminiu,cama din aluminiu,cilindru din aluminiu aprox.127gr.

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#19 Useril este offline   Jimmy 

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Postat 20 January 2006 - 05:33 PM

Cilindrul are un arc in interior pt.revenire

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#20 Useril este offline   Jimmy 

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Postat 20 January 2006 - 05:35 PM

Anexele
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#21 Useril este offline   Jimmy 

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Postat 20 January 2006 - 05:36 PM

...

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#22 Useril este offline   Jimmy 

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Postat 20 January 2006 - 05:38 PM

---

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#23 Useril este offline   Jimmy 

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Postat 20 January 2006 - 05:41 PM

Butelie

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#24 Useril este offline   Jimmy 

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Postat 20 January 2006 - 05:46 PM

Valva de umplere

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#25 Useril este offline   Valteras 

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Postat 23 January 2006 - 10:19 AM

Jimmy, la 20 Jan 2006, 17:28, a spus:

... mai putin jambele, care mai mult ca sigur vor fi din aluminiu cu amortizoare.

Io am incercat niste jambe de test. Din tevi de dural. Lucreaza bine, pare-se. Merg mai "uns" decat alea originale Robart ( in stanga in imagine). Asta pt. ca nu freaca metal pe metal (ca la Robart) pt. ce le-am pus bucshi de teflon.
Totusi, le-am last in stadiul de "prototip" si o sa le folosesc alea clasice Robart, dupa ce le modific dispunerea "compasului".

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#26 Useril este offline   Jimmy 

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Postat 26 January 2006 - 05:32 PM

Personal incerc bara din al strunjita......buuuuuna ideea cu bucsa de teflon!!!!

Ghidajul cred ca merge cu stift in canal frezat,eventual compas de forma.
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#27 Useril este offline   Valteras 

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Postat 27 January 2006 - 09:17 AM

Io unul, nu prea pot sa pun stift in canal, sau cel putin tre sa-l "ascund" bine, sa nu se vada. E de luat in calcul, insa.
Compasul la mine e "atipic" ca pozitionare. Nu e inspre inainte ci e inspre inauntru si-mi strica niste socoteli, futu-i!

Bucsarea cu teflon e beton! Merge "uns". Tre bagat intai bucsile strunjite grosier, presat, urmand ca strunjirea respectiv alezarea fina sa se faca cu jamba respectiv tzeava prinse in strung.
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#28 Useril este offline   AB17LUK 

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Postat 27 January 2006 - 11:10 AM

Valteras, la 23 Jan 2006, 10:19, a spus:

...le-am pus bucshi de teflon.

Chiar merita?
Eu am observat ca daca le ungi cu ce trebuie, merg bine.
Este un spray cu vazelina... forate bun!
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#29 Useril este offline   Jimmy 

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Postat 06 February 2006 - 06:08 PM

Yeah!
Si la butucul rotii am putea pune rulmenti in loc de bucse sau nimic.....folosim vaselina,ulei,vaselina si iar ulei...si totusi se rotesc pur si... muove (simplu ).
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