iron eagel

Yep that would work cool.
Internal servo mounting also is an improvement that will work well of IC or electric versions.

rcguy59

My Feedback: (8)

Fired up my trusty old Sears band saw and cut a set of Demon parts. Took less than an hour, but way too tedious for me. I'd much rather have the laser-cut parts. Well, Mike...

MJD

My Feedback: (1)

It's already a done deal, we're on.

I'll have part sets cut by this weekend, if I can get them done sooner then bonus.

I'll call..

iron eagel

Is this intended for an electric version or a serious glow powered one with the single fin?
I take it you really like the way they fly.

rcguy59

My Feedback: (8)

Those were mostly an experiment to see how accurately and quickly I could cut a set. They turned out fine, but I'd much rather buy them from Mike and spend the time building. I have way too many ideas for Demons than I'll ever be able to get to but right now I'm thinking single fin and piped YS .45. No record-breaker, just lots of fun. I have a motor coming in a few days for an electric Demon. 1500W, 6S. A 26" Demon for my Conquest 15 is also soon to hit the bench. Plus, I need to build a few for sale to my buddies at the field that don't build their own stuff. (far too many these days) Yes, by the way, I LOVE the way mine flies. I'm blessed with a lot of airplanes that fly very well and the Demon is near the top of the list. If you factor in transport and set-up at the field, the Demon is the champ, hands down. The O.S..32SX is a huge factor, too. Reliable as hell and as user-friendly as they get. Good on fuel and no appetite for plugs. I still have 2 of them that have never seen fuel and need homes. I have a place for at least one more .32-powered Demon in my personal hangar.

iron eagel

I still have one OS .32 left (ringed), currently without a home, but it's such a good motor I can't part with it, it just may end up in a Demon as well.
I got to get my catapult straightened out so I can get my electric Demon in the air with the small props using the high KV motors static thrust is a real issue during launch.
If you do it right you may be surprised at just how fast that YS .45 will haul it.
It so sad that hardly no one builds anymore, it has been the same way at my club out of a hundred members we only have a dozen max that ever build anything, and only 4 or five of us build most of what we fly. I have to admit to having a couple of ARFs but they are primary fun fly type of stuff that I have modified to beat on.
I have come to really like the small planes like the demon myself no assembly just toss it in the car and go fly.

iron eagel

Removed went through twice.

rcguy59

My Feedback: (8)

I know what you mean about not being able to part with an unused engine. The 32SX in my "Loud Bird" is ringed and has a Bowman ring in it. It's piped too, and really hauls the mail.

iron eagel

I bet it does.

rcguy59

My Feedback: (8)

Got bored last night and started on the second short-kit. This will be a slightly simplified "sport" version geared toward quicker building. It will be .32 powered with a single fin integral with an elongated radio hatch ala Outlaw. Should be easier to carry and launch and especially, to start. Not having anything (that doesn't rapidly get hot) to hang onto when starting is a P.I.T.A. This way, I can start and launch by myself. It will be done before this coming weekend but the servos I ordered probably won't be here in time. The LHS used to stock HS225's, but not anymore. I'll install the hardpoint for the pipe mount, but I think I'll start with a Macs muffler, since I have one I've never used. I know they don't help the power a bit, but that's OK. The primary purpose of this Demon will be to let (almost) anyone who wants to fly one, do so. Kind of a "Demo Model". Once they find out just how easy they are to fly, they'll all want one. Here's the progress so far.

rcguy59

My Feedback: (8)

Here's a video of it. It was a bit of a dead end, as there was a frightening amount of wing flex before I even got the engine on-step. I kind of gave up on it at that point because I didn't want to lawn-dart it sans wings. Been there, done that.
https://www.youtube.com/watch?v=VO8yXxLqhUg

iron eagel

Nice little ARF but still an ARF.

MJD

My Feedback: (1)

I'm looking forward to seeing your single fin arrangement. A version with a skinny Shrike like fuselage and central fin/rudder is in the sketchbook already.

rcguy59

My Feedback: (8)

I also considered that type of fuselage to enable a firewall-type engine mount. That would allow easily swapping different engines with different mounting dimensions. It would also provide something to land on besides the bottom of the wing.

rcguy59

My Feedback: (8)

Thought I might post a pic of the fin while the epoxy cures. The fin is 3/16" balsa with 1/4" tri-stock at the root. The hatch is 1/8" lite-ply. The hatch has a hook on the underside at the rear.

rcguy59

My Feedback: (8)

Got a problem with ARF's? Then don't buy 'em.

Rudeboy

The opening and closing point are always equal on either side of TDC. You can't change one and not change the other.

If you have 180 degrees of exhaust timing, The port opens 90 degrees after top dead center, and closes again 90 degrees before the piston reaches TDC again.

iron eagel

I don't have a problem with ARF's, they just have their limits, most are good for what they are. If you want to go for real performance custom built is the way to go.

Having a bit of a fuselage within the structure of the wing is pretty much needed for a high power electric, or a glow that eats lots of fuel. The big plus is the wing get a whole lot less abuse during landings.

iron eagel

Just to divert a bit for a few.
Anybody have ideas for a good trigger mechanism for a catapult? My hood pin going through a board leaves a lot to be desired, it binds and lift the carriage up off of the rollers at times. I want to get it working smooth and reliably before I try my Demon, I put to much work into my SD to lawn dart it on takeoff.

rcguy59

My Feedback: (8)

I can't argue with that. My second Demon is almost ready to cover. These damned things are addictive! And, Mike, it's no longer "Demon Pimp", it's "Demon Pusher". This is the fourth day since flying my Demon and I'm having serious withdrawal symptoms. The outrunner I ordered showed up today along with the latest issue of MA. The motor will be a hell of a lot more useful.

combatpigg

My Feedback: (3)

IE....the "trigger" can be difficult to operate with a lot of launching tension on it.
An idea for a release mechanism is to have a hinged arm hold against the sprung load, similar to the way a mouse trap is held open.
You can use a pin with attached lanyard to hold the hinged arm pinned fully back.

petec

My Feedback: (58)

I found this in the for sale here on RCU and had to travel to Clifton NJ for work so I bought it......I'm thinking after the 7.5 DF SD sees the air this could be a good candidate.

rcguy59

My Feedback: (8)

That looks identical to mine. Major screamage.

petec

My Feedback: (58)

Henry Nelson had modified Perry carbs available at one time. I am thinking that would be a good thing. He doesn't live far from me (or at least he didn't used to) it might be worth a 45 minute drive to see what he has.

iron eagel

Thanks CP that should eliminate all the force on the carriage upon the release. Trying to lift the hood ring off of the hood pin just isn't working, the hinged arm to hold the hood pin will work perfectly.
Thanks again!

A SD with those engines should get up and go.