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Old Mar 24, 2010, 09:26 PM
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New York
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Len, photos tomorrow. Just glued the plywood tongue into the fuse.

Charlie, I'm using HS-985MG servos on all surfaces. I think they offer a great combination of speed and torque: 144 oz inches/.16 sec. 60 degrees on 4.8 volts. You could use the digital versions (7985) but I don't think there's any real advantage in this application.

Steve
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Old Mar 24, 2010, 09:30 PM
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Corner Ketch, DE
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Steve I was going to use 645mg do you think these are good enough
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Old Mar 24, 2010, 09:43 PM
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New York
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Charlie, I'm sure they'll do a fine job. I just prefer more speed (.16 vs. .24) and more torque (144 vs. 107) at 4.8 volts.

Are these differences truly noticeable? Ask 12 guys and you'll get 12 different opinions. Of course running at 6 volts you pick up more speed and torque.

My 2 cents,

Steve
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Old Mar 24, 2010, 09:51 PM
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Lbuff1's Avatar
Killingworth CT
Joined Nov 2008
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Charlie, My tug has 645mg's throughout the plane except the throttle and choke, they are standard 821's
I would recommend upgrading the flap servos though, I plan to upgrade the flaps servos in mine this week.

hope this helps.

len
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Old Mar 24, 2010, 09:55 PM
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Corner Ketch, DE
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Steve your 2cents are worth $1000.00 to all of us
Thanks for the input
I am changing to the 985mg hopefully G-Force will not mind my order change
I called Tony today to place the order so it should not be a big deal

My AMR 50 gasser is ready to go , 80zdz with a Mez 24 /10
Nice power , Will test on tow Sunday

Charlie
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Old Mar 25, 2010, 01:20 AM
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MadCap231ex's Avatar
Talent OR
Joined Nov 2007
306 Posts
Servos

We use 5955's for rudder and elevators, 5985's on the ailerons, 5625's for flaps, and a 5645 for the throttle. The tow release will be a DS20-UMD Hyperion.

I really like the roll authority and with 5955's at the tail, we should not get too much feedback from the tow line.

Matt
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Old Mar 25, 2010, 10:42 AM
Go Oregon Football!
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Talent OR
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Flaps

Quote:
Originally Posted by Lbuff1 View Post
...
I would recommend upgrading the flap servos though,...

len
Len,
What problems are you having with the flaps using the 645's?
Ours seem to hold well and that is even having them fully deployed at about 60 degrees down. I am using a the 5625 that has lower torque than your 645.

I programmed in 29% down elevator with flaps at or past 45 degrees to keep the Porter from ballooning up after flap deployment.

Matt
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Old Apr 01, 2010, 11:38 PM
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Central Point, OR.
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These babies should keep my prop out of the rocks!

Randy
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Old Apr 01, 2010, 11:40 PM
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Killingworth CT
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Will the Axle be long enough?
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Old Apr 02, 2010, 12:21 AM
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Central Point, OR.
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Len
Why don't you think of these things for me before I go and make a fool of myself?!

Randy
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Old Apr 02, 2010, 06:25 AM
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New York
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What about sleeving the axles with the appropriate metric size brass tubes to extend the length, then drilling a cross hole to secure the wheel with a cotter pin, a technique used in some scale applications. This assumes you just need a small extension to the axle to get the job done. Comments?

Steve
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Old Apr 02, 2010, 09:07 AM
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Central Point, OR.
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Thats what I thought of(the concept anyway)while staring at the ceiling at 3AM..! Thanks Steve, for the how to!

I probably only need about a half an inch more...

I guess I did not think through, all the things that would have to be modified on the Porter when hanging a bigger engine on the nose...

Randy
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Old Apr 02, 2010, 09:17 AM
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New York
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Randy, I think one of the aspects that makes this hobby so engaging is the willingness for many of us to try new things, to stray off the beaten path and be willing to risk creating new problems to solve in the pursuing new ideas, then to stay up to til all hours figuring out a good solution.

My wife never understands why this hobby offers me so much enjoyment as I spend so much time figuring out new solutions to lots of building/fling problems. Sometimes I don't either!

Can't wait until my Porter is airborne, too.

Regards,

Steve
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Old Apr 02, 2010, 11:14 AM
Soar Tow 2
mwgib123's Avatar
West Jordan Utah
Joined Jul 2006
375 Posts
now that is a big tire wow. now the porter will look like an Alaska tundra plane. my six inch (im talking about tires now) were almost too wide, now 8". send some pics so I can see what it looks like, I might want to do the same thing.

MIke
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