No.. could it be..?
03-01-2015, 09:40 PM
#227
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I have a Demon airframe complete, CF and glass on fins, covered in 1.87 oz Ceconite (SIG Koverall is the same material but quite bit lighter) shrunk drum tight up to the full 350F, then sealed with nitrate dope, primed, and shot with gloss white Hobbypoxy. Torsional stiffness is amazing.
You don't get a heavier finish. The complete empty airframe weighs 615g = 1lb, 5-3/4 oz. Plus 39oz = 3lb 12-3/4 oz.
These are your three grades of Ceconite aircraft covering BTW:
[TABLE="width: 92%, align: center"]
[TR]
[TD="class: style4"]FABRIC TYPE
[/TD]
[TD="class: style4"]WEIGHT
[/TD]
[TD="class: style4"]THREAD
COUNT
[/TD]
[TD="class: style4"]BREAKING
STRENGTH
[/TD]
[/TR]
[TR]
[TD="class: style2"]LIGHT (uncertified)
[/TD]
[TD="class: style5"]1.7oz/sq. yd
[/TD]
[TD="class: style5"]98 x 98/in
[/TD]
[TD="class: style5"]Average
67 lbs/in
[/TD]
[/TR]
[TR]
[TD="class: style2"]C102
[/TD]
[TD="class: style5"]2.6 oz./sq. yd
[/TD]
[TD="class: style5"]68 x 68/in
[/TD]
[TD="class: style5"]Over 102 lbs/in
[/TD]
[/TR]
[TR]
[TD="class: style2"]C101
[/TD]
[TD="class: style5"]3.4 oz./sq. yd
[/TD]
[TD="class: style5"]65 x 58/in
[/TD]
[TD="class: style5"]Over 125 lbs/in
[/TD]
[/TR]
[/TABLE]
You don't get a heavier finish. The complete empty airframe weighs 615g = 1lb, 5-3/4 oz. Plus 39oz = 3lb 12-3/4 oz.
These are your three grades of Ceconite aircraft covering BTW:
[TABLE="width: 92%, align: center"]
[TR]
[TD="class: style4"]FABRIC TYPE
[/TD]
[TD="class: style4"]WEIGHT
[/TD]
[TD="class: style4"]THREAD
COUNT
[/TD]
[TD="class: style4"]BREAKING
STRENGTH
[/TD]
[/TR]
[TR]
[TD="class: style2"]LIGHT (uncertified)
[/TD]
[TD="class: style5"]1.7oz/sq. yd
[/TD]
[TD="class: style5"]98 x 98/in
[/TD]
[TD="class: style5"]Average
67 lbs/in
[/TD]
[/TR]
[TR]
[TD="class: style2"]C102
[/TD]
[TD="class: style5"]2.6 oz./sq. yd
[/TD]
[TD="class: style5"]68 x 68/in
[/TD]
[TD="class: style5"]Over 102 lbs/in
[/TD]
[/TR]
[TR]
[TD="class: style2"]C101
[/TD]
[TD="class: style5"]3.4 oz./sq. yd
[/TD]
[TD="class: style5"]65 x 58/in
[/TD]
[TD="class: style5"]Over 125 lbs/in
[/TD]
[/TR]
[/TABLE]
03-01-2015, 09:48 PM
#228
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I was curious on the specs, had to look it up again. The fabric is certified for any aircraft with a wing loading under 9lb/sq ft. Should be okay..
Depending which fabric you buy light uncertified grade is 1.7-1.89 oz/sq yd. It's really heavy for small models but I had 10 yards of it so it found it's way on a couple of Demons. Not too many around with tougher covering than those two. Or heavier, but they're not bad as you can see from the numbers. I bought a pack of SIG Koverall and will use that next, it is a fair bit lighter than the uncert grade.
Depending which fabric you buy light uncertified grade is 1.7-1.89 oz/sq yd. It's really heavy for small models but I had 10 yards of it so it found it's way on a couple of Demons. Not too many around with tougher covering than those two. Or heavier, but they're not bad as you can see from the numbers. I bought a pack of SIG Koverall and will use that next, it is a fair bit lighter than the uncert grade.
Last edited by MJD; 03-03-2015 at 02:00 PM.
03-08-2015, 09:06 AM
#232
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Here is my list of people in line for short kits:
[TABLE="width: 127"]
[TR]
[TD]Rudeboy[/TD]
[/TR]
[TR]
[TD]Pond Skipper[/TD]
[/TR]
[TR]
[TD]Bonified Wingnut[/TD]
[/TR]
[TR]
[TD]petec [/TD]
[/TR]
[TR]
[TD]dbacque[/TD]
[/TR]
[TR]
[TD]Lomcevak Duck
[/TD]
[/TR]
[/TABLE]
Who am I missing? Put your hand up please!
[TABLE="width: 127"]
[TR]
[TD]Rudeboy[/TD]
[/TR]
[TR]
[TD]Pond Skipper[/TD]
[/TR]
[TR]
[TD]Bonified Wingnut[/TD]
[/TR]
[TR]
[TD]petec [/TD]
[/TR]
[TR]
[TD]dbacque[/TD]
[/TR]
[TR]
[TD]Lomcevak Duck
[/TD]
[/TR]
[/TABLE]
Who am I missing? Put your hand up please!
03-09-2015, 06:57 PM
#237
You're on, CP. Maybe I'm a good candidate for a build thread simply because I've never seen a Demon in person before. I've had a couple of Outlaws and I even kit-built an all-wood delta canard called a EuroMach that was turbine powered. Now I just need that short kit...
03-09-2015, 07:12 PM
#238
That EuroMach must be a real crowd pleaser..!
Nothing real cool like that ever got flown around at our local club...mainly Tower trainers doing inside loops when the pilot felt like getting "rowdy".
A build thread would be fun to see at this forum at least once every 4 or 5 years or so......
Nothing real cool like that ever got flown around at our local club...mainly Tower trainers doing inside loops when the pilot felt like getting "rowdy".
A build thread would be fun to see at this forum at least once every 4 or 5 years or so......
03-09-2015, 07:40 PM
#239
Actually, that airplane was about 20 bad habits flying in formation. I did a build thread on it in the turbine forum. Mine was the second, and so far, last one to fly. I was still fairly new to jets, which didn't help any. It was an adventure, though. After removing all of the equipment, I gave it to a neighbor kid who thought it looked cool. I probably didn't put more than 4 or 5 flights on it. Search "Euro mach" on youtube and you can find the video of the maiden.
Last edited by rcguy59; 03-09-2015 at 08:20 PM.
03-09-2015, 08:33 PM
#241
It sure took off nicely..!
That's a pretty short run way and approach for such a plane.
You got it down safely..so nice job..!
The Screamin' Demon will be a walk in the park for you. You could even glue aluminum skid plates in key places underneath and slide it in on that asphalt run way.
Demons just make such convenient "Grab and Go" type planes.
That's a pretty short run way and approach for such a plane.
You got it down safely..so nice job..!
The Screamin' Demon will be a walk in the park for you. You could even glue aluminum skid plates in key places underneath and slide it in on that asphalt run way.
Demons just make such convenient "Grab and Go" type planes.
03-09-2015, 08:49 PM
#242
I got a new toy in the mail today from Tower. It's a Futaba optical tach sensor that mounts on the plane, plugs into the RX and sends RPM data to the TX in real time. Now I can find out how much an engine unloads in the air and in a dive. *****in' Betty (the radio's female voice) will tell me the rpm every time I flip the appropriate switch. She also tells me the speed via GPS. Altitude, distance and rate-of climb/descent are also avail. from the GPS module. The GPS and RPM modules are less than an ounce each. For the Demon, I'll have to break out my headphones so I can hear Betty over the screamage.
03-09-2015, 10:31 PM
#243
That tach will add quite a lot of fun to what you're doing..!
I think it'll educate your ear after you use it long enough.
I don't want to bring up a taboo subject here [but in the event of an unplanned landing in the woods]...will any GPS gadgetry walk you right up to the LZ...?
I think it'll educate your ear after you use it long enough.
I don't want to bring up a taboo subject here [but in the event of an unplanned landing in the woods]...will any GPS gadgetry walk you right up to the LZ...?
03-10-2015, 04:35 PM
#245
Make a normal-type landing and you might track it down. Last summer I had one of these GPS modules in a HobbyKing Fun Fighter. I let it get too far away, lost orientation, pulled while inverted and stuffed it at full throttle. I was getting consistent 104-105mph passes, so it hit the ground pretty good. The receiver lost power as soon as it hit, either because the power plugs came out or the receiver was destroyed outright. Either way, there was no GPS info from the plane at that point. Several people saw it go in and all agreed on the same spot.(a rarity) A friend and I tromped around out there for a couple of hours and came up empty. I have it listed as "Still on patrol". It was pretty little when intact, and the crash didn't do it any good, I'm sure. The airplane was just under $100 but the bit that hurt was the $150 receiver and the $180 GPS module. It was also the first crash I've ever had where I didn't recover ANYthing. Considering the stuff I usually fly, it was probably the cheapest crash I could have had. I was so upset, I didn't fly again for almost 20 minutes.
03-10-2015, 04:49 PM
#246
That's a story I can laugh along with you about but also feel the pain. I've lost stuff that practically crashed 100 feet from me..!
That's a pretty Big Hit to take. My biggest loss was a $250 Cyclon .061 and about 15 cents worth of 3/16" plywood it was attached to.
The best thing about a Demon build thread, is that 90% of it is finished the first night and if you don't get carried away with the final details it ought to be wrapped up in just another few sessions. There was a guy who used to post here called Da Screw who was building a .40 sized delta about every other day.
That's a pretty Big Hit to take. My biggest loss was a $250 Cyclon .061 and about 15 cents worth of 3/16" plywood it was attached to.
The best thing about a Demon build thread, is that 90% of it is finished the first night and if you don't get carried away with the final details it ought to be wrapped up in just another few sessions. There was a guy who used to post here called Da Screw who was building a .40 sized delta about every other day.
03-10-2015, 05:26 PM
#247
The Demon looks pretty simple, so it should go as quick on the building board as it does in the air. I used to knock up a Shrike in a weekend, including covering. The Demon looks to be even faster to build. The brown truck dropped off a quart of West System epoxy today, so I'm set there. The new bearings arrived yesterday for my Nelson .40 and a long-time pylon racer that works at the LHS has agreed to install them for me since he has the tool for it and he will set the deck-height as he assembles it. I'm getting so pumped about this that I think the OS .32SX is going to have to wait for something else. I have 5 of these little gems, one in a ProudBird EF-1, and 2 in an F-82 Twin Mustang. About a year ago, I picked up a Conquest .15 ABC with a full pipe. Might be a good excuse to scale-down a Demon for it...
03-10-2015, 06:31 PM
#248
I've got a OS CVA .15 powered delta with 26 inches of span. It's got stock timing, but the pipe helps a little. You got to really get the CG spot on and the control throws as conservative as you can get them to make something this small and powerful easy to control.
IIRC, all it has is a 5/32" or 3/16" FG kite tube for a spar that runs through a few 1/4" thick balsa ribs.
IIRC, all it has is a 5/32" or 3/16" FG kite tube for a spar that runs through a few 1/4" thick balsa ribs.
03-10-2015, 08:03 PM
#250
I think the APC 6.5 x 5 was the best I tried with the little delta / CVA .15. The 7 x 5 sport prop is a good choice, but the 6.5 x 5 is worth trying if you get the chance. I've got the header cut pretty short and am using the standard MACs .15 pipe. The only other item is a C/L venturi...it's either home made or I took a OS venturi and hogged it out. I don't recall what difference it made VS the stock carb, but it's big enough to need either CC pressure or a combat bladder.
