Ceres as Christmas Present - Page 6 - RC Groups
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Feb 10, 2013, 06:11 AM
Thermal Wrangler
DrFragnasty's Avatar

Ceres vs Thermal Monster

Lots of lift today powered by a Southerly which made launching easy thanks to the sun being behind.

Managed to induce flutter from a pin drop from some height, but definately less dramatic than previous. The solution I feel is bigger horns for ailerons too. 94761s on ailerons are dead quiet which makes for a pleasant change.

Yesterday at Braddon's Lookout I launched the Ceres with 1.3Kg ballast and struggled to get air and got sucked into a tree in dramatic fashion. Smashed into a large limb and was lucky to survive with just a chunk out of the LE.

Either we bungee to get airborne or switch launch locations. Or hack the trees to shreds (which are now 40 ft tall). Thankfully had a fully-ballasted Sunbird 60" to keep the eagles honest.

Flew thermal today carrying a big horse bite out of the LE on one side covered with tape.

Sensational lift today. Want proof? Here we go:

Ceres F3B vs Thermal Monster (11 min 20 sec)

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Feb 10, 2013, 10:28 AM
Detail Freak
target's Avatar
Here's a question:
What size servo arms and how much servo travel are you using for your ailerons?
If I recall correctly, the arms on my aileron servos in my Ceres are 5 or 6mm long.
That means I had to drill a hole in any brand of servo arm closer to the output shaft than is available stock.
I would think about doing this before putting a bigger horn on the aileron. It makes a difference, and generally accomplishes the same as what you are doing, only keeps the linkage less exposed.

Feb 10, 2013, 06:27 PM
Thermal Wrangler
DrFragnasty's Avatar
Hi Target,
re: aileron horns; Needs Further Investigation.

Feb 10, 2013, 08:13 PM
Registered User
Oh no, 5 min 23 sec in your flying over the road. mmmmmmmmmmmmm

Like I said many months ago Chris - Silicone the hinge line
Feb 11, 2013, 02:26 AM
I do this for fun!
Very nice vid Chris,

Really enjoyed your commentary.

I must admit I have been thinking along similar lines to the guru. Except I would use Sikaflex 227, a urethane product which in its zinc tube dispenser form comes with a nozzle perfect for laying into F3X hinge lines. I have used this on my Needle 100 hinge lines with great success and recommend it highly.

Apr 07, 2013, 08:27 AM
There is only DS
airtimeasto's Avatar

Big Ceres is it fast?

Hi all,

Just a question to the Big ceres owners. Is it faster than a Ceres F3F If one would Ds it, Compared to the smaller version?
Apr 09, 2013, 12:29 AM
Everything's A Compromise
Larrikin's Avatar
Sorry Asto,
Not an answer for you.
Chris, I just watched your video. Couldn't help but hear your disappointment with the JR 171s.
The Sniper is fitted with those and we've found them to be as bad as you say they were.
They were tight when new but have developed an unacceptable amount of slop in the gear train ... noisy too.
I've got some MKS6125s for flap and MKS6125 minis for aileron to go into it.
Time to make the change
Apr 09, 2013, 02:17 AM
Thermal Wrangler
DrFragnasty's Avatar
Hi David,
Yeah, shame about those servos. Good choice on the MKSs.

It'll be interesting to see how the 171 / 378 replacements pan out.

It sounds like a lot of pilots are flying the MKS flag now.

KST MKS clones now have a Hi Voltage version that might be worth a look. Personally, I'll be running Airtronics 94761s for everything but flaps (JR 3401s all the way here).

Apr 09, 2013, 01:27 PM
Detail Freak
target's Avatar
I haven't tried the newer JR DS398's, but I hear that they are everything the 378's should have been.
Several friend have them and rave about them.


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