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Apr 28, 2011, 11:49 PM
Entropy is happening!
Jim.Thompson's Avatar

Rds


Eric,

Will your RDS drives have some end float provision? I've found with my home made ones at least, that this is the hardest part. Because control surfaces are surface hinged, (top or bottom), the central RDS cranks need to move in and out to give correct geometry and prevent jamming.

Jim.
Last edited by Jim.Thompson; Apr 28, 2011 at 11:50 PM. Reason: extra information
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Apr 29, 2011, 09:00 PM
DS= -$ & :-)
Ezza's Avatar
Quote:
Originally Posted by Jimbello
Eric,

Will your RDS drives have some end float provision? I've found with my home made ones at least, that this is the hardest part. Because control surfaces are surface hinged, (top or bottom), the central RDS cranks need to move in and out to give correct geometry and prevent jamming.

Jim.
Hi Jim,

These drives don't have end float provision. I haven't heard of any issues with this setup in this thread so I'm assuming it works fine. I have seem some drives in other threads that do move in and out.

Eric
Apr 30, 2011, 04:06 AM
I do this for fun!
Looks really sweet Ezza

I'll be looking for flight reports when I get back in town.

Go Great!

Ken.
May 15, 2011, 08:32 AM
DS= -$ & :-)
Ezza's Avatar
Finally got back to this beauty and have the wings finished. I found basically that the more I bent the flap rods the more deflection became available. Sorry I didn't measure but I bent the rods quite a bit more(three times before I was happy), and have almost 90 degree flaps available and more than necessary reflex. I did bend the aileron rods about an extra 10 degrees but as mentioned by others it is probably not needed.

I have to agree with Target, the rds pockets are really tight. No slop.

One tip, when gluing the rds drives and rods into the coupler, fit the drives to the servo shaft to get correct centreing first. I glued them together on the bench. This cost me a few degrees in travel as I had to adjust to get the RDS rods centred.

Waiting for fuse servos and battery now.

Eric
May 15, 2011, 03:25 PM
Entropy is happening!
Jim.Thompson's Avatar

Drive rods


Quote:
Originally Posted by Ezza
Finally got back to this beauty and have the wings finished. I found basically that the more I bent the flap rods the more deflection became available. .................................

Eric
What diameter are the drive rods Eric?
And what are the pockets made out of? I made my last ones out of carbon fibre/epoxy. But not sure it that was the best.

Jim.
May 15, 2011, 09:02 PM
DS= -$ & :-)
Ezza's Avatar
Hi Jim,

The rods are 3mm thick and the pockets appear to be carbon.

Eric
May 16, 2011, 05:13 AM
Registered User
You will find that the rods are 3.1mm
The Aussie rods are 3mm

Mick
May 16, 2011, 11:34 PM
Detail Freak
target's Avatar
The ones on my Cyril I measured at 3mm..... And I would assume that they are the same on the Fosa, but I confess to being in a rush during measurement, and could be inaccurate.

R,
Target
May 17, 2011, 02:04 AM
Registered User
Are the Fosa's build up using standard carbon or spread tow carbon
May 17, 2011, 02:54 PM
Registered User
LS8-18's Avatar
Unfortunately they don't use spread tow. I asked for that on my Fosa order...
May 17, 2011, 03:54 PM
Registered User
P-51flyer's Avatar
Got the word that my Fosa is on its way to the states, can't wait! Time to fly some B!!!

Aaron
May 17, 2011, 04:30 PM
R/C Soaring "Lifer."
stevecondon's Avatar

1.86 KG FOSA Ballast Sets


Hey guys,

One thing I noticed when I first flew speed with my Fosa was that with all the brass in it, I still wanted to be quite a bit heavier, and I am sure the Fosa could launch it no problem.

I commissioned some molds for the wing and fuse ballast to cast lead slugs (about 25% heavier than the brass) and I also had some brass pieces machined to a taper that fits perfectly in the wing joiner. This cost a lot less than Tungsten!

Fuse slugs = 85g ea
Wing slugs = 225g ea
Joiner inserts = 140g ea

With full lead and only two brass pieces in the rear joiner (one piece in each side of the back compartments) it brings the AUW to almost 4 KG (3.93).

I have a limited number of sets (5) and am going to sell some of them to raise funds to replace a broken wing panel on my Fosa :'(

$125 each including shipping (con US). Send me an e-mail directly to stevecondon at cox.net if you are interested. Prefer PayPal but will accept other forms of payment too.
May 17, 2011, 09:43 PM
Registered User
Quote:
Originally Posted by stevecondon
Hey guys,

One thing I noticed when I first flew speed with my Fosa was that with all the brass in it, I still wanted to be quite a bit heavier, and I am sure the Fosa could launch it no problem.
Steve is right, you can load this one with ballast. I have my wing ballast set up with 3 pieces on each side and have tungsten and brass slugs for the wing. I've flown the model to 3.75kg, haven't tried 4kg yet. No problem launching and flying it at 2.75kg in dead calm.
May 27, 2011, 02:11 PM
Also known as simon_t
en_spt's Avatar
Just arrived this evening

Simon
May 27, 2011, 02:58 PM
Team JR Air
tewatson's Avatar
It apparently has some sort of pox disease...better get that looked at right away.

Tom


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