combatpigg

My Feedback: (3)

It looks Bad Asp...!

iron eagel

I understand all about fun with computers.
The cowl looks sharp.

MJD

My Feedback: (1)

There, I think I've done my part for TLAR aerodynamics and it's time to finish up the cowl and move along..

iron eagel

Looking good.

MJD

My Feedback: (1)

Compared to this I did a crappy job on the cooling inlet on the .65 and it seemed happy. So this oughta work.

MJD

My Feedback: (1)

3lb 5.2 oz minus finishing the hatch and trim and a few screws.

dbacque

My Feedback: (3)

Very nice!

What can you tell us about your servo hoods. I'm formulating thoughts on something very similar.

I'm out of the building business for now. Busy at work as well as around the house, getting ready for medical leave. Everybody says "Oh man, you're going to get so much building done!" But it's not quite like that. Mobility will be an issue and my workshop is not handicap friendly. I could go about an hour before I need something that I wouldn't be able to reach. So my SD build will have to wait until February or so. But I sure can do lots of thinking and planning in that time!

Looking good Mike. That's a beautiful setup.

Dave

MJD

My Feedback: (1)

I've made a couple like that now, and as I casually plunk away and finalize rev 2 Demon, I'll have it as a standard part. I'll put the parts on a pdf so you can see and post later.

1/16" ply hatch, 1/32 ply hood sides, 1/32 ply cap over the top.

MJD

My Feedback: (1)

The hatch, for some forgotten reason, is offset on this Demon. Hench the lack of symmetry. I could standardize it and make it part of the kit, but every change has a secondary effect of some kind - in this case the design of the hatch locks in the location of the servo arm, requiring the mounting to be consistent and not a scratch build design-on-the-fly exercise. I goop my servos in now.. not sure that'll go over well as a standard method. Anyhow I am thinking of simple servo mounting schemes too, including hatch cover mounting. I have some of those molded plastic hatch cover/servo mounts that I thought of incorporating at one point. But in the spirit of wooden construction I'll think on the idea of laser cut ply versions. The aileron servo mounts in one of my ARFs are done like that.

dbacque

My Feedback: (3)

As always, I overthink things. I like the way you made the hoods.

Dave

MJD

My Feedback: (1)

Double post

MJD

My Feedback: (1)

Hey do those images show up for everyone else? Not on my screen, just says attachmentxxxxxattachmentyyyy.. but when I edit it I see them..

So Dave, why don't you move into the workshop? My wife has suggested this before..

I thought I'd do all kinds of things in my time off.. 7 weeks I guess it was.. and while I did crank away at a few things, I also loved the part about going to bed and having no idea what I might do in the morning, and then waking up and actually doing bugger all because I could. It was a cruel taste of retirement life, got to like it a lot.

dbacque

My Feedback: (3)

Yeah, that the attachments on that last post didn't work. Just shows up as attachment xxxxx and clicking on them says they don't work. But the explanation did work. Man, I was thinking of all kinds of ways of doing fiberglass and a little ply solves the day. I love it.

As for moving into the workshop. Well, with as many airplanes as there are in it, there's just no place to sleep. Much less space to maneuver the one knee scooter I'll be riding on. Oh well, I can wait. The Demon will be fast next season.

Dave

dbacque

My Feedback: (3)

Yeah, the attachments on that last post didn't work. They just shows up as attachment xxxxx and clicking on them says invalid attachment.

But the explanation did work. I was thinking of all kinds of ways of doing fiberglass and a little ply solves the day. I love it.

As for moving into the workshop. Well, with as many airplanes as there are in it, there's just no place to sleep. Not even enough space to maneuver the one knee scooter I'll be riding on. Oh well, I can wait. The Demon will be fast next season.

Dave

dbacque

My Feedback: (3)

Yeah, the attachments on that last post didn't work. Just shows up as attachment xxxxx and clicking on them says invalid attachment.

But the explanation did work. I was thinking of all kinds of ways of doing fiberglass and a little ply solves the day. I love it.

As for moving into the workshop. Well, with as many airplanes as there are in it, there's just no place to sleep. Not even enough space to maneuver the one knee scooter I'll be riding on. Oh well, I can wait. The Demon will be fast next season.

Dave

MJD

My Feedback: (1)

Try again..

MJD

My Feedback: (1)

I got a double post, you have a triple there. I wonder what the record is

I can see the pictures now, can you?

combatpigg

My Feedback: (3)

The pictures look good from here.
I think as long as Demon builders are made aware that some of the top pylon racers GOOP their servos flat to the fiberglass fuselages of their planes, that should help persuade some to try it.
As long as the servo can be GOOPED to a 1/16" plywood pad it ought to be bullet proof. You could also prep a balsa surface with a well glued in piece of 1/32" plywood, to give a GOOPed in servo a more substantial base....but I haven't tested this option. A test to see how much force is required to peel 2 sq inches of plywood from a balsa surface would settle that question.

MJD

My Feedback: (1)

The Goop bond is pretty tenacious and over a decent amount of surface area so there is no question of security. If the balsa is soft, a ply pad is smart. I have Gooped them to harder balsa though-- this spreads the load very well.

dbacque

My Feedback: (3)

I like your servo hoods. I was thinking of the same ply base but then either glassing it over while adding the hoods or making vacuum formed hoods. And since I built a vacuum former, that's still an option.

Somehow, I'm intrigued by hooding the entire linkage out to the aileron horn. Easy to do with vacuum formed plastic. I'll probably break them in the rough where I have to land but they sure will have style points.

Yep, I'm definitely going with the magic faerie boogers for servo mounting.

Thanks for the details,
Dave

Rudeboy

Which GOOP exactly are you talking about?

I've used 3M double sided foam tape with succes.
Coat the wood, whatever it is, with CA, until is you have a smooth surface. Green ZAP works best for me. Degrease servo with brake/clutch cleaner. Apply tape and position servo, leave overnight. At first you think it doesn't stick properly, the day after you'll nearly rip your plane to pieces to get that servo back out.

combatpigg

My Feedback: (3)

Hello RudeBoy...! You probably have a similar product in Belgium if you have never seen this brand. People use it to repair holes in rubber boots and loose soles of shoes and boots.
It has tolulene as a solvent so it shrinks quite a lot as it dries which might enhance it's grip.
I've used double sided tape / CA glue with .049 powered planes, but I think GOOP is a little bit stronger. All I know for sure is that GOOP mounted servos is endorsed by local .40 size pylon racers.

MJD

My Feedback: (1)

It truly is tenacious - very very strong and tough. Also note, it has some chlorinated solvent in it* so don't try it on EPO foam, although it looks okay when you first apply it it will turn the foam to mush.

As long as the substrate is clean and strong enough, the servo ain't going anywhere. You can slice them out if you need to later.

* at least the marine version does, I like it.

MJD

My Feedback: (1)

On foam tape, I have had enough trouble that I still use CA on each side.

combatpigg

My Feedback: (3)

Yessiree...!
IIRC, it was a ACE RC kit [maybe the GLH?] that suggested using double sided tape to mount the servos.
I've always used lacquer thinner to etch the servo cases and on the balsa surface I'm a believer in poking holes in the wood then soaking it with some medium CA to toughen it.