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Old Oct 25, 2007, 08:23 AM
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New Product
New Generation is Coming---Digital Servoless Retract Landing Gear System(PATENT)

I think it is the time. We try to change your image about retract.
High Precision and high level stability but lower price.
Digital Servoless Retract is coming soon.
Test Video as below.
www.epf.com.tw

size detail as below.
http://www.epf.com.tw/en_prod-airpla...ssRetract.html
thanks
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Old Oct 25, 2007, 09:11 AM
EDF all the way!
bruff's Avatar
Gilbert, Az
Joined Jun 1999
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Very interesting. What is the weight?
Bob
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Old Oct 25, 2007, 10:58 AM
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Moore, Oklahoma
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very cool, please tell us more!

I see EJF is one of your dealers! Good for us
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Old Oct 25, 2007, 02:56 PM
Pusher jets rule!
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Mesa, AZ
Joined Jan 2006
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Nice! More info please!

Pat
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Old Oct 25, 2007, 03:05 PM
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Ed Waldrep's Avatar
Las Vegas, NV
Joined Dec 1996
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Cool idea, running air lines and chasing leaks is a pain. The challenge will be fitting them in the thin wings of small edf jets but I don't know how thick they are. Looking forward to more info!
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Old Oct 25, 2007, 03:20 PM
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bsoder's Avatar
Mesa, AZ
Joined Aug 2004
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I really like this idea. eliminates the linkage problems. I'd really like to know weights, dimensions, and prices. Something like this built off a small (say HS-55 sized) servo would be great... rack and pinion gearing?
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Old Oct 25, 2007, 03:29 PM
PGA
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Very cool, like the smoth move. Not that quick one we are used to.
Looking forward for more info.
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Old Oct 25, 2007, 04:17 PM
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thomanie's Avatar
Trondheim, Norway
Joined Jun 2003
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A litte more info and pics here
http://www.epf.com.tw/ensite/en_prod...ssRetract.html

IMHO, the mounting lugs on the housing limit these to foamies, or lightly build aircraft, if they are plastic. Based on the size of the wheel in the pics, the housing must be about 60x45x25mm (2.5x1.75x1")?

Thomas
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Old Oct 25, 2007, 06:39 PM
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Size of DSR-46(Digital Sevoless Retract 46 class) as below:
L:46mm
W:27mm
H:24.5mm
The total weight with struct and scale rubber wheel about 50~55g/one. I hope it is ok for your aircraft.
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Old Oct 25, 2007, 06:41 PM
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50-55g for all three? or per?
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Old Oct 25, 2007, 06:46 PM
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Quote:
Originally Posted by bsoder
50-55g for all three? or per?
Per one,
All of them are made in TAIWAN.
We try to give any one best quality and funny.
but lower price.
and do not worry a fail as air retract.

EPF HOBBY.
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Old Oct 25, 2007, 06:50 PM
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Mesa, AZ
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Any plans to make a smaller version? That's too big for a parkflyer, but I really like the concept.
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Old Oct 25, 2007, 06:55 PM
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Quote:
Originally Posted by bsoder
Any plans to make a smaller version? That's too big for a parkflyer, but I really like the concept.
Yes, We have a plan to make a small one,
But I have no ideal what size is suitable for park flyer??
Would you please do me favor to give me more concepts of them.
like size(L*W*H), weigh??

thanks
EPF HOBBY
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Old Oct 25, 2007, 10:11 PM
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about the size of the GWS blue retracts would work, since there are kits designed around that size. The biggest problem I have with what's available now is strength - they just can't handle a rough landing. If you can solve that problem, you'll sell a lot of them.

Here's a couple pictures. The retracts I'm using here are the pneumatics sold at RC-Warbirds - http://www.rc-warbirds.com/product_i...roducts_id/330

They work well, but they're simply not strong enough - I've broken knuckles a few times already, I'm looking at getting them replaced in aluminum now. The wire's not thick enough either. They're rated to 600g plane weight but that's not realistic, they're not strong enough for that.

This link - http://www.rc-warbirds.com/images/rc...icro_plate.jpg - shows you the measurements of the pneumatic retracts, if that helps. Something in that same rough size would be great.

If you need a beta tester, keep me in mind.
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Old Oct 25, 2007, 11:54 PM
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Taiwan
Joined Feb 2004
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Quote:
Originally Posted by bsoder
about the size of the GWS blue retracts would work, since there are kits designed around that size. The biggest problem I have with what's available now is strength - they just can't handle a rough landing. If you can solve that problem, you'll sell a lot of them.

Here's a couple pictures. The retracts I'm using here are the pneumatics sold at RC-Warbirds - http://www.rc-warbirds.com/product_i...roducts_id/330

They work well, but they're simply not strong enough - I've broken knuckles a few times already, I'm looking at getting them replaced in aluminum now. The wire's not thick enough either. They're rated to 600g plane weight but that's not realistic, they're not strong enough for that.

This link - http://www.rc-warbirds.com/images/rc...icro_plate.jpg - shows you the measurements of the pneumatic retracts, if that helps. Something in that same rough size would be great.

If you need a beta tester, keep me in mind.
Hi Bsoder,

thanks for your help to provide all informations.
I will keep in mind in next smaller retract.

EPF HOBBY
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