Zdjęcia silników -

[MASK]

To moje najmniejsze boxerki. O pierwszym już pisałem na 13 stronie tego wątku. Silnik jest zbudowany z wykorzystaniem elementów silników Fox 15 (tłoki, cylindry i głowice), na pokrywie ma napis: Woelfel 5 c.c. Na jego temat nie mogę znaleźć kompletnie nic. Drugi silnik, to zagadeczka, myślę, że niezbyt trudna

 

[Platon]

To moje najmniejsze boxerki. O pierwszym już pisałem na 13 stronie tego wątku. Silnik jest zbudowany z wykorzystaniem elementów silników Fox 15 (tłoki, cylindry i głowice), na pokrywie ma napis: Woelfel 5 c.c. Na jego temat nie mogę znaleźć kompletnie nic. Drugi silnik, to zagadeczka, myślę, że niezbyt trudna

 

G-Mark Twin, fajny maluch

[bynek]

kolejna zagadka 

 

 

 

[RomanJ4]

Alee jeszcze jedna rzecz nie daje mi spokoju w jaki sposób ten wichajster od spodu umożliwia regulację stopnia sprężania? Bo chyba do tego on jest.

 

This is a 1948 Glow Mite .099 model engine, the glow plug version of the Mite Diesel. It is featured on page 170 of the American Model Engine Encyclopedia.

These engines feature an unusual bleed valve on the bottom of the crankcase. The engine is complete This version did not come equipped with a fuel tank. It has a Arden Glow plug. The compression is fair to good There are several broken off head fins around the cylinder head screws. The mounting screw holes are slightly drilled. I will gladly combine orders for shipping. I check to see which is cheaper, USPS Priority Mail or a USPS Priority Mail Flat Rate Box which is often not the better deal on light weight shipments.

 

 

 It has a crankcase pressure release valve at the bottom of the crank case

http://www.worthpoint.com/worthopedia/mite-098-diesel-engine-506473385

http://adriansmodelaeroengines.com/catalog/main.php?cat_id=44

 

• Mite .099

The little American-made Mite .099 motor is the one that stands out from the rest in terms of its operating characteristics.  The reason for this is its remarkably low compression ratio – only 13.5:1!! This is excessively low for any model diesel and in my view represents a major design error on the part of the manufacturers. 

The makers appear to have recognized the implications of the low compression ratio employed, but their response to this recognition was somewhat unusual! Rather than taking the seemingly logical step of increasing the engine's fixed geometric compression ratio, they went instead to a recommended fuel mix of 50% oil, 50% ether! Experience shows that you really do have to use such a mix – with less oil, the effective operating compression ratio is simply too low for smooth running at any speed. This engine provides the most dramatic possible evidence of the effect upon an engine's operational compression ratio of adding more oil to the fuel. 

For starting, this engine is unusual in that you need to get a lot of fuel into the cylinder to reduce the unused space in the combustion chamber and generate enough heat for starting. Thanks to the very wide explosive limits of ether, you can get away with this. However, another problem rears its ugly head at this point – the method of mounting the prop driver on the shaft is highly unsatisfactory, with an absurdly small tapered shoulder against which the prop driver rests – more of a slip joint than an actual fixture!  As a result, the prop tends to slip while starting the engine from cold. You have to really tighten it down, and even then it’s problematic. 

For this reason, the Mite is one fixed-compression diesel which is actually far easier to start when hot! There’s no tendency to detonate – the low compression ratio and high oil content jointly see to that! When hot, you just follow normal fixed-compression procedure as outlined above, and the engine re-starts very easily. 

As far as props go, I’ve found that an 8x8 prop is the lightest load on which the engine will run smoothly on the bench. Try an 8x6 and you get past the speed range at which the timing is optimized. The Mite turns an 8x8 at around 5,500 rpm on the bench. Naturally, it moves a fair bit of air while doing so, and would undoubtedly fly a small model very well. But it will not run smoothly above about 6500 rpm on the standard 50% fuel mix, and it seems absurd to consider adding even more oil to such a mix. So I’d recommend an 8x8 as the ideal test and flight prop for this engine. Indeed, this prop size was recommended by several contemporary testers of the Mite. 

The castings on the Mite are all magnesium, so you have to follow the usual precautions to prevent corrosion while the engine is in storage. That said, the Mite is a neat little engine which runs well but would undoubtedly have benefited from being supplied with a higher compression ratio and a better method of mounting the prop driver. 

I also have a Vivell .099 fixed-compression diesel, but have never run it since I wish to preserve its New condition. It feels as if it has a rather low compression ratio as well, and I suspect that its running characteristics would not be unlike those for the Mite. I know from personal experience that the variable-compression version of the Vivell runs amazingly well for a diesel of its displacement and date, so there's no reason to suppose that the fixed-compression version would not also be a very stout performer.  

I also own an example of the Bonnier fixed compression diesel, a very well-made French contemporary of the Micron having very similar handling and performance characteristics. I haven’t bothered to include any commentary here because this engine is so rare that the chances of anyone finding one to try are very low. I just got lucky ………. an article on the Bonnier will appear in due course on this web-site. 

Well, there it is! There’s no reason to fear setting up that old fixed-comper in the test stand and giving it a run! You’ll be as surprised as I was at how instantly they start and how well they do in fact run once everything is sorted out. Moreover, the contest records compiled by several of them will no longer seem quite so implausible!

 

 

 

 

http://modelenginecollecting.com/images/Model-Engine-Encyclopedia-Index.pdf

https://www.hitpages.com/doc/6618198791159808/1#pageTop

http://modelenginecollecting.com/engine-encyclopedia.html

https://www.google.pl/url?sa=t&rct=j&q=&esrc=s&source=web&cd=5&cad=rja&uact=8&ved=0ahUKEwiotLn7zsjKAhWED3IKHVN5BSQQFgg5MAQ&url=http%3A%2F%2Fmebarabaoyunlari.net%2Flibrary%2Fcqz%2Famerican-model-engine-encyclopedia-book.pdf&usg=AFQjCNGBWJgTS5xC8QCukzuQMEp3I_dJKw&bvm=bv.112766941,d.bGQ

 

 

Mite Manufacturing Co.   .....170

Glo-Mite                            .......170

Mite Diesel                       .......170

http://modelenginenews.org/drj/mite.html

http://www.rcgroups.com/forums/showthread.php?t=1054975&page=394

http://modelenginenews.org/faq/fc_diesel_ops.html

 

 

może się do czego przyda

http://www.mecoa.com/museum/archive1.html

https://www.google.pl/url?sa=t&rct=j&q=&esrc=s&source=web&cd=6&cad=rja&uact=8&ved=0ahUKEwiwk4a51cjKAhXhjnIKHfuRDLcQFghBMAU&url=http%3A%2F%2Fwww.antiquemodeler.org%2Fsam_new%2Fnews_letters%2Fassets%2FSS-1998-139-144.pdf&usg=AFQjCNEw0kETT5QHsE6XqInZDwmVvs9LjQ

(m/in reklamy silników)

[MASK]

kolejna zagadka

 

Wydaje mi sie, ze to Madewell 49

[bynek]

Wydaje mi sie, ze to Madewell 49

 

 

Trafiony na 100 procent!!!

[MASK]

Masz całkiem sympatyczną kolekcję amerykańskich silników

 

A tymczasem ten elegancki motorek powitał mnie w samym środku soboty. Dobry na kolejną zagadkę

 

[bynek]

Masz całkiem sympatyczną kolekcję amerykańskich silników

 

A tymczasem ten elegancki motorek powitał mnie w samym środku soboty. Dobry na kolejną zagadkę

 

To silnik do akrobatek na uwięzi Fox 59.

[bynek]

A ten jak się nazywa?

Dla ułatwienia dodam ,że ma pojemność 2,5 cm3 i był produkowany seryjnie w  jednym z krajów Beneluxu.

Technologia AAC i  ważył tylko 114 gr.

 

[Paweł Prauss]

USE

[bynek]

USE

 

 

Holenderski  USE 15 Mk II.

 

Dla Pawła to nie było trudne, bo doskonale zna silniki uwięziowe.

[Paweł Prauss]

Mam nawet taki w swoich zbiorach :-))

Niestety w gorszym od Twojego stanie.

[Paweł Prauss]

Dzięki Zbyszkowi ze Szczecina od wczoraj w mojej kolekcji goszczą takie dwa ciekawe motorki:

Kto zgadnie co to za maszyny?

 

[dyra63]

Ten pierwszy to chyba Weston lub coś bardzo podobnego- czterosuw bezzaworowy ?

[Paweł Prauss]

Masz rację Adamie, choć bardziej znany jest pod nazwą RCV 120 SP.

[RomanJ4]

http://www.rcvengines.com/rcv_modelhome.htm

http://www.rcvengines.com/applications_uav.html

 

[MASK]

Dzięki Zbyszkowi ze Szczecina od wczoraj w mojej kolekcji goszczą takie dwa ciekawe motorki:

 

Jakieś pięć lat temu Zbyszek zasilił moją, wtedy jeszcze bardzo skromną kolekcję, nowymi silnikami ST G20 diesel i G60. Oba wciąż mam i nadal cieszą moje oko  

[Paweł Prauss]

Dobra, dobra a ten drugi? 

[MASK]

Dobra, dobra a ten drugi? 

 

To pewnie RSR 40, ale z takim gaźnikiem, to nie często się widzi. To gaźnik, czy tylko zawór do odcinania powietrza?

[Paweł Prauss]

Oczywiście masz rację Marcinie.

OS MAX .40 SR z 1973 roku - pierwszy OS w którym zastosowano system płukania Schnüerle.

Rasowy racer do klasy F3D czasowanie wydechu zostało tak zaprojektowane (156°) aby mógł pracować bez rury rezonansowej.

Z tego co zdążyłem się zorientować to jest to egzemplarz z pierwszego wypustu na rynek (prosty gaźnik RC) w późniejszych motorkach zastąpiony został zwykłą dyszką Venturiego patrz fotka poniżej.

Więcej można znaleźć tutaj:

http://www.mh-aerotools.de/airfoils/pylon_engines.htm

cytuję z powyższego źródła:

stroke: 18.4 mm
bore: 21.2 mm
mass: 309 g
Był to tak przełomowy model w historii firmy, że znalazł się na tej stronie:

http://www.osengines.com/history.html