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G20, G23, G26, G38 reduction gear?

Old 08-02-2010, 05:31 AM
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abufletcher
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Default G20, G23, G26, G38 reduction gear?

ORIGINAL: Teus
Did someone ever tryed a G20, G23 or G26 with reduction gear? That could be a great solution for our 1/4 scale models to turn a scale size prop.
Does such a thing exist? If not, why not?
Old 08-02-2010, 06:20 AM
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Teus
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Default RE: G20, G23, G26, G38 reduction gear?

G38 is no problem. Toni Clark can supply a very good and proven reduction drive. You saw one in Frank's Pup Don at the Dawn patrol.

Old 08-02-2010, 07:05 AM
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abufletcher
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Default RE: G20, G23, G26, G38 reduction gear?

ORIGINAL: Teus
G38 is no problem. Toni Clark can supply a very good and proven reduction drive. You saw one in Frank's Pup Don at the Dawn patrol.
Really? Frank's Pup was flying on a G38? I had assumed that all of these 1/3 scale Pups use a G62. So what size prop does the G38+reduction drive allow?
Old 08-02-2010, 07:20 AM
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Default RE: G20, G23, G26, G38 reduction gear?

The standard prop for Clark´s reduction drive is a 32x18. That will spin at 2.700-3.000 depending on the exhaust.
Mick Reeves in the UK makes a reduction drive for the ZG62, and used to make drives for the ZG23. But it seem that this has been discontinued as I can´t seem to find it on his website.
Old 08-02-2010, 11:55 AM
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Ralf strutter
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Default RE: G20, G23, G26, G38 reduction gear?

Mick Reeves used to have one for the ZG23 [sm=thumbs_up.gif]
On RCMF is a thread where I stole this pic from [sm=red_smile.gif]

[link]http://www.rcmf.co.uk/4um/index.php/topic,61898.30.html[/link]

Mick doesn't sell them anymore but since the front of the houses of the ZG20 and 26 are the same as on the ZG23, there might be a new market!
I know I want one!!



Ralf
Old 08-02-2010, 12:43 PM
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ggraham500
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Default RE: G20, G23, G26, G38 reduction gear?

Stupid question from the gallery ... why use a reduction drive? Advantages? Disadvantages?
Old 08-02-2010, 12:52 PM
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Ralf strutter
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Default RE: G20, G23, G26, G38 reduction gear?

Main advantage is to get that scale diameter prop
It just looks terrific!

WW1 birds had very large props and it just looks a little foolish if your prop isn't larger as the cowl [:'(]
You also get a better response over your elevator and rudder due to the greater propwash

Also a bit more weight in front with this type of birds is a plus
Due to the short WW1 noses most of the time extra ballast is needed there, so why not make it usefull?

The geared petrol engines give also a very nice sound
The prop rpm's are lower so is the noise

Ralf
Old 08-02-2010, 03:09 PM
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Teus
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Default RE: G20, G23, G26, G38 reduction gear?

Thanks for posting Ralf,

Never heard or seen this reduction drive before. Perfect for my ZG-20, I want one...................... And with an extended shaft to hold a free rotating dummy....................

Sounds perfect to me [8D]

Q. Why was Mick stopped selling these drives?
Old 08-02-2010, 03:48 PM
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Default RE: G20, G23, G26, G38 reduction gear?

You can also get the grear drive through http://www.vogelsang-aeroscale.com/g...eschlundt.html
I have the TC drive for my Z 38 for my 1/3 DVI Im finishing up. THe props are beautiful they are large and heavy being the gear drive and all. They sound fantastic too. For WWI you should fly nothing else especially if your looking to throw that large or shall I say closest to scale prop!

Glen B.
Old 08-02-2010, 04:24 PM
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Teus
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Default RE: G20, G23, G26, G38 reduction gear?

I already have the Schlundt drive for my ZG62. In this topic we are especially searching for reduction drives for the smaller ZG engines like the 20 to 26. If they (still) exists.
Old 08-05-2010, 11:42 AM
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Teus
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Default RE: G20, G23, G26, G38 reduction gear?

Ralf did some research and Emailed Mick Reeves, the answer below,

hello Ralf,

An order for 10 would be enough. price without tax about £130
Production would have to fit in around other jobs though so it would take a couple of months.

ratio is 2:1

props 22x10 & 20x10 peak power at 4700 -5000 rpm
28x6 to 24x8 gives 3700 to 3900 rpm
28x14 over propped at 2600
22x6 too fast at 5300
Only the fitting to the ZG-20 (my favorite) looks a little difference. We also have to figure out if the unit also fits to the 26 or alone to the 23.

The big question:

Is there enough interest to start an order by Mick?

Teus

Old 08-06-2010, 07:09 AM
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Default RE: G20, G23, G26, G38 reduction gear?

I would be interested, might be prepared to go either way (26/20). Can anyone here suggest a quality ARF which calls for the scale larger prop on the 20? on the 26? (right now I've got a 26 in the larger Kangke Monocoupe with an 18 x 6.) If I were to build I'd probably go with the Toni Clark Practical Scale Tiger Moth using the Z38 and the reduction gear, all available on the Vogelsang site listed above.
Old 08-06-2010, 07:18 AM
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Default RE: G20, G23, G26, G38 reduction gear?

I might be interested using my G26 with EI, but have no idea what plane to put it on. Right now the G26 going into my old (ver 1) H9 1/4 scale Taylorcraft.
Old 08-06-2010, 06:39 PM
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Default RE: G20, G23, G26, G38 reduction gear?

Somebody must still be makeing them. We had a guy flying a 50% fly baby with a G-62 & reduction drive at our event a few weeks ago. Your correct, those big props do look neat & it flew the plane very realistic......Gene
Old 08-06-2010, 09:51 PM
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Default RE: G20, G23, G26, G38 reduction gear?

i would be interested in the g-26 reduction drive,,, i have had my eye on balsa usa's spad
Old 11-17-2010, 01:28 AM
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Default RE: G20, G23, G26, G38 reduction gear?

HI GUYS;I am putting together a 1/5 scale AD-1 skyraider I wood like to run scale prop size witch is about 32" with a Quadra 65.or should I say a 32 four blade.
Old 12-05-2010, 12:00 PM
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Teus
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Default RE: G20, G23, G26, G38 reduction gear?

Just found this site: [link=http://www.zitz-drehtechnik.de/Getriebe.html]Zitz Drehtechnik[/link]

ZG-20 Geardrive for example, perfect for 1/4 scale WW-I [8D]

Der Antrieb dreht eine 19 x 12" bis 24 x 6" Luftschraube.


Teus
Old 12-05-2010, 01:33 PM
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Default RE: G20, G23, G26, G38 reduction gear?

Great find, Teus! At 199 Euro the price isn't bad either. And the spoked wheels look nice too. I also like their new take on "hand starting!"
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Old 12-05-2010, 01:59 PM
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Default RE: G20, G23, G26, G38 reduction gear?

So, Teus (and others), if you were going to buy ONE Zenoah engine for use in a 1/4 scale fighter (Pup, Camel, DrI, DVI, EIII, N11, etc.) and planned to use it with one of these belt drives, which size would you pick? I'd lean towards the Z26.
Old 12-05-2010, 02:20 PM
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Teus
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Default RE: G20, G23, G26, G38 reduction gear?

I am very happy with my ZG-20EI. Runs very smooth for 4 years now. I know that the ZG-26 magneto is also a good runner, don't know about the ZG-26EI.

Teus

Ps.

That website stated no beltdrive for the ZG-26
Old 12-05-2010, 04:52 PM
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Default RE: G20, G23, G26, G38 reduction gear?

I've got a couple of very good running G23s.......I would love to get a Mick Reeves reduction drive for one of them.

Think of what it would do for a 1/4 scale DR1 or N-17 or DVII or.....well just about any quarter scale WW1 bird would benefit don't you think?

I would be interested if you can muster the 10 needed for a production run.

Cheers,
Art
Old 12-05-2010, 06:19 PM
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Default RE: G20, G23, G26, G38 reduction gear?

I am very happy with my ZG-20EI. Runs very smooth for 4 years now. I know that the ZG-26 magneto is also a good runner, don't know about the ZG-26EI.

Teus

Ps.

That website stated no beltdrive for the ZG-26

ZG-26EI runs great a little high on the MAH draw from the battery like all Zenoahs though
Old 12-06-2010, 12:41 AM
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Default RE: G20, G23, G26, G38 reduction gear?

Nice machining...
Old 12-06-2010, 02:00 AM
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Default RE: G20, G23, G26, G38 reduction gear?

How do these belt drive applications work on "round cowl" models? I can see them being great in something like a DVII or SE5a but does the offset engine still fit well in a round cowl? Looks like the engine would need to be offset several inches.
Old 12-06-2010, 05:39 AM
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Teus
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Default RE: G20, G23, G26, G38 reduction gear?

ORIGINAL: abufletcher

How do these belt drive applications work on ''round cowl'' models?
Very good, you create even more space in your round cowl
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