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Caelus New F3A design by Top RC Model

Old 03-02-2016, 10:24 AM
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Anthony,

Thanks for the link. I really like the article on "Fuselage Exit Point for Rudder Pull-Pull Cable". Didn't really say if the cables are crossed or not. I assume they are crossed.
Old 03-02-2016, 05:17 PM
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I fixed the rudder horns so they are now in line with one another and got the rudder epoxied on. The hinge line gap is really tight with full deflecton.
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Old 03-07-2016, 11:08 AM
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Originally Posted by shepga
Big G,
Have you asked Chuck H. to have a look and maybe fly it? Your close to his neck of the woods aren't you. (relatively speaking). If he helps you would have this thing worked out in a heart beat....First contest is less than a month away....Time for some quality practice...
Went over the flight characteristics with Chuck (and others) this past weekend. The general consensus is the c/g and setup is close enough not to mess with. The mixes I need (fairly minor), I'll live with. Won first place in Intermediate this past weekend, and the guys thought it flew great. Next contest is in 2 weeks.

Last edited by big_G; 03-07-2016 at 04:59 PM.
Old 03-10-2016, 04:51 PM
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Originally Posted by big_G
Went over the flight characteristics with Chuck (and others) this past weekend. The general consensus is the c/g and setup is close enough not to mess with. The mixes I need (fairly minor), I'll live with. Won first place in Intermediate this past weekend, and the guys thought it flew great. Next contest is in 2 weeks.
what is the ready to fly weight and what batteries are in the plane when this weight was taken?
Old 03-10-2016, 05:07 PM
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Originally Posted by luckymacy
what is the ready to fly weight and what batteries are in the plane when this weight was taken?
I was about 50 grams overweight (5050 grams). Batteries are Hobby King Zippy compact 5,000 ma/25C.
Old 03-10-2016, 05:09 PM
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Originally Posted by big_G
I was about 50 grams overweight (5050 grams). Batteries are Hobby King Zippy compact 5,000 ma/25C.
good info. my generation 1 weighs 11.5 pounds with similar batteries.
Old 03-10-2016, 05:27 PM
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My weight is with a 22-12 carbon fiber prop. That saved me about 100 grams over the same size APC.
Old 03-11-2016, 04:36 AM
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Originally Posted by big_G
My weight is with a 22-12 carbon fiber prop. That saved me about 100 grams over the same size APC.
I have the falcon lightweight carbon spinner and a relatively light weight falcon prop. That's why I have to mount my main battery packs as far forward as practical. Yesterday when I re weighed it at the field with a fellow club member and came out at 11.5 pounds we spent a couple of minutes trying to figure out what I could do to get rid of half a pound. Besides the battery pack to something smaller and lighter which I have, I'd be hard pressed to come up with it. I also am using the light weight version of the Castle ESC. I could drop the wheel pants. I could drop one of the two small receiver batteries. I am not using an arming plug so nothing to remove there. maybe find lighter landing gear. I don't know. It'd be a challenge. That's' why I'm really curious how much the newer version weighs compared to the previous version on average before adding any equipment.

Just curious, what does a top of the line plane such as a Oxai Ascent typically come out of the box weighing and weigh in RTF? Are they also really right up to 11lbs or can these really come in closer to 10 RTF? Just curious if the saying you get what you pay for translates into a LOT of weight savings, relatively speaking. Are the materials the airframes are made out of very different?

I'm still waiting for a complete list of what's actually different in the design/manufacturing process to reduce weight between the original Caelus and the newer version.

Last edited by luckymacy; 03-11-2016 at 05:49 AM.
Old 03-11-2016, 06:41 AM
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Originally Posted by luckymacy
I have the falcon lightweight carbon spinner and a relatively light weight falcon prop. That's why I have to mount my main battery packs as far forward as practical. Yesterday when I re weighed it at the field with a fellow club member and came out at 11.5 pounds we spent a couple of minutes trying to figure out what I could do to get rid of half a pound. Besides the battery pack to something smaller and lighter which I have, I'd be hard pressed to come up with it. I also am using the light weight version of the Castle ESC. I could drop the wheel pants. I could drop one of the two small receiver batteries. I am not using an arming plug so nothing to remove there. maybe find lighter landing gear. I don't know. It'd be a challenge. That's' why I'm really curious how much the newer version weighs compared to the previous version on average before adding any equipment.

Just curious, what does a top of the line plane such as a Oxai Ascent typically come out of the box weighing and weigh in RTF? Are they also really right up to 11lbs or can these really come in closer to 10 RTF? Just curious if the saying you get what you pay for translates into a LOT of weight savings, relatively speaking. Are the materials the airframes are made out of very different?

I'm still waiting for a complete list of what's actually different in the design/manufacturing process to reduce weight between the original Caelus and the newer version.
Mike goes through the weight differences in Post #188
Old 03-11-2016, 12:41 PM
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I made a small stand today for my ESC to set on and it weighs 11.2 grams. This will be glued to the bottom of the fuse and it puts the ESC right in line with the cooling holes in front.
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Old 03-11-2016, 12:52 PM
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FYI, I am using this esc...84 grams and works great.
http://www.hobbyking.com/hobbyking/s...ler_OPTO_.html
Old 03-15-2016, 02:32 PM
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Ok guys. I was looking at where to cut the slots in the fuse for the pull pull rudder cables. I ran a string from the rudder control horn down the side of the fuse where it looks like the servo arm on the rudder servo would be as far as height. I does not look like the cables with pass under the wood bracing where the white arrows are. It looks like the cables will hit about where the red arrow is. Are the cables suppose to pass through the second or third hole?
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Old 03-15-2016, 04:48 PM
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Second hole. Here's how Dave S. setup mine.
Ken
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Old 03-15-2016, 04:53 PM
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Originally Posted by kdunlap
Second hole. Here's how Dave S. setup mine.
Ken
Thanks for the info.
Old 03-15-2016, 05:00 PM
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Also, one other thing. Found out that Hangar 9 Ultracote trim matches the Caelus' colors exactly. Caelus Red = H9 True Red, Caelus White = H9 White. These matches are exact. I was having a tough time seeing the plane and I covered most of the gold with white. I also changed the green stripe in back to white. Helps a lot. Will be doing more color changes as well.

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Old 03-17-2016, 01:39 PM
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Those H9 colors looks like a perfect match. I got some holes cut in the fuse via my dremel tool so now the fuse can breath a little. The slots in the bottom of the fuse are where I put them on my 50cc 12S set up and had no cooling issues. I'm hoping for the same here.
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Last edited by Zippi; 03-17-2016 at 01:59 PM.
Old 03-20-2016, 03:12 PM
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Got all the servos installed. I had to add some 1/8" ply to the inside of each stab as the servos were not long enough but only took about 30 min to complete both stabs. Control linkage on the ailerons are connected and programmed. Tail wheel installed. The supplied screws had no threads to hold. Once again I headed to my junk box. Landing gear is installed after re-drilling the left gear as it was drilled in the wrong place and man does this plane have some serious tow in. I don't see the foam tires lasting long at all landing on concrete. It is now on it's legs and looking good.
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Old 03-21-2016, 03:12 PM
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can I have the link for exit point for rudder pull pull cable on fuselage
Old 03-21-2016, 03:44 PM
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Originally Posted by seeling
can I have the link for exit point for rudder pull pull cable on fuselage
Look at post #300
Old 03-23-2016, 04:23 PM
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Got the tail end all buttoned up tonight. Not much left to do so I'm hoping for the maiden in a couple weeks.
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Old 03-25-2016, 06:19 AM
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Ok guys. I just checked the CG on my Caelus and with the Lipo's moved all the way forward and even with the battery tray my CG is at 9" (228.6mm). The manual shows 7 1/2" (190mm). To reach the 190mm in the manual I have to move my batteries so far forward that the batteries are about 1 1/2" from hitting the firewall. I am using Futaba S9650 servos on the elevator that weigh 0.92oz. This is less than the JR 3421 suggested servos that come in at 1.04oz. My CC 80HV ESC is about 1" behind the firewall. I'm also using the Gator R/C 22ga servo extensions. I am using the Falcon 3 blade prop and spinner. Maybe I'm to light in the nose. Where do you guys have your CG set???
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Last edited by Zippi; 03-25-2016 at 07:03 AM.
Old 03-25-2016, 06:45 AM
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Originally Posted by Zippi
Ok guys. I just checked the CG on my Caelus and with the Lipo's moved all the way forward and even with the battery tray my CG is at 9" (228.6mm). The manual shows 7 1/2" (190mm). To reach the 190mm in the manual I have to move my batteries so far forward that the batteries are about 1 1/2" from hitting the firewall. I am using Futaba S9650 servos on the elevator that weigh 63oz. This is less than the JR 3421 suggested servos that come in at 75oz. My CC 80HV ESC is about 1" behind the firewall. I'm also using the Gator R/C 22ga servo extensions. I am using the Falcon 3 blade prop and spinner. Maybe I'm to light in the nose. Where do you guys have your CG set???
Zippy, I think there is a typo or you are using the Torque value at 6v. I looked at the servo weight and per Tower they are .92oz ea which seems to be about right. I don't know enough about the plane to be very helpful. However, in post 290, the picture has the esc in front of the battery tray and the batteries are pretty far forward.

What is the weight of your batteries?

Is there any equipment you installed that could be moved forward?

Last edited by DRC1; 03-25-2016 at 07:27 AM. Reason: Corrections
Old 03-25-2016, 07:34 AM
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Seems to me that most of the weight savings on the V2 was in the nose. I would add weight to the nose, either move the receiver battery as far forward as you can, add stick on weights or heavier batteries to get the C/G to 7.5 inches. You can always move the C/G aft after a few flights. FYI...mine is currently at 9.25 to 9.5.
Old 03-25-2016, 08:15 AM
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I have my batteries at the aft end of the tray just touching the wing adjusters, feels locked in there
Old 03-25-2016, 08:27 AM
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Thanks for the info guys. My mistake on the weight of the servos. I have edited my post. I moved my RC pack up front so now I'm at 8 3/4" on the CG. big_G, if your flying your Caelus with the CG at 9.25 to 9.5 then I should be good to go.

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