nine o nine

My Feedback: (1)

If you need to show them off on the ground for judging purposes the motor would not be running of course. Same thing for demonstrating retractable gear for the judges. Mitch

ram3500-RCU

My Feedback: (221)

Good point. I just don't know if I want them working that much. Mixed to the flaps reduces their action time. Don't know yet how big a deal this is.

NCIS

Ram,

I still haven't cut out my cowl flaps on my 1/8" thick cowl for my Corsair. Yes I know I went a little overboard on the cowl fiberglass. It weighs 5.5lbs before I cut out the front for the engine. Do you think this method would work on that thick of a cowl flap? Next question what is your address so I can ship it to you and get it back finished. I pay well.

Barry
Corsairkidd

Mustangman40

My Feedback: (1)

That'sgood point nine.. There are options, looking forward to seeing the vid on the finished product..

ram3500-RCU

My Feedback: (221)

You sir, are a funny boy. Lets see now, I think that makes at least 4 I have to do, besides my other ones. How about 'cowlflapsforwarbirds.com'

To answer your question, yes, I do think it would work. I'd use the Du-bro #257s on them (larger hinge pin and pivot = slightly wider gap). Then I would taper the back side of the flap where in meets the cowl in the center of each flap. That's the only tight place. The rest of it opens up because of the curve. Did i say that clear enough? Hope so.

I have a smaller 100" Corsair (seems crazy to say that 'smaller' 100") cowl here, that I want to do. I'll post here how it goes.

ram3500-RCU

My Feedback: (221)

Some additional pictures for details.

1 - the 1/32 ply to just one side
2 - the over laps. 3/16 on the glue side, 7/16 on the overlap to adjacent flap (hinge notched to relieve binding)
3 - one flap near the center is overlapped on both sides
4 - the gaps around flaps and cowl when closed

ram3500-RCU

My Feedback: (221)

Good suggestion. I'll make one as soon as I get the permanent epoxy on it.

ram3500-RCU

My Feedback: (221)

I went over the flap hinges and cable guides with some Loctite epoxy.

David Bathe

I haven't seen this thread before and upon inspection, I've got to say RAM' it's a very nice solution.Really great to see new creative ways of cracking the old nut.A fine job!

JSZ

My Feedback: (73)

Hi Gary, met you at Monster Planes last year. I finally got everything from Dino for my P47 and have the wings framed up. Thanks for posting this, I will be doing mine as well. What are you using to cut the flaps off with. I've been following yours and Wayne's theds closely. I'm planning on bringing it to MP's this year. Thanks John

JeffH

My Feedback: (43)

I would think that slaving them to the gear would be the easiest solution. You need them open for take off, dirty passes, or any other time you are low and slow to keep the engine cool.

ram3500-RCU

My Feedback: (221)

Hello John. I remember meeting you. Boy, that was a great week end, wasn't it. The weather, the planes, the wonderful people, the facility, Franks hospitality, the laid back atmosphere, just couldn't ask for a better event. Anyway, I'm looking forward to this years event.

As for the flaps, I cut them off, and apart with a Dremel and the thin composite cutting wheel. Works like a charm. Got to have a very steady hand though, and that last little corner at the cowl I do with an Exacto knife, so as not to nick the cowl.

You have the fiberglass fuselage, right? Can't remember. I know you told me.

I'm always here if you need anything.

Cheers,
Gary Prince
[email protected]

ram3500-RCU

My Feedback: (221)

That is an idea you have there. I didn't think of using the gear sequencer. I'll ponder that. Thank you Sir.

I'm adding all the Hysol epoxy last night and today. As soon as that is done, I'm going to hook them up to a spare RX and take that video of them. Stand by.

JSZ

My Feedback: (73)

Thanks Gary, I will. Talk to ya. And yes I have the FG fuse.

NCIS

Thanks for the feedback ram.

ram3500-RCU

My Feedback: (221)

You're welcome. If you decide to do it, please post some pictures here for us all.

Gary

tevans55

This is a really nice setup...great work! I have a question. Do you think for a smaller cowl like a .60 or 1.20 size plane that one servo mounted at the base of the firewall would work if you hooked each wire to opposite sides of the servo arm?

ram3500-RCU

My Feedback: (221)

Yes, that is the very setup I think I will need to do even on my Giant Corsair cowl. The flaps go all the way around and only a small space at the top is available for the servo. Everything scaled down including the cable and the servo, I don't see why it wouldn't. You can find even mini servos with over 50oz torque now.

When I get into it, I'll post in this thread.

Other ideas or methods are welcome as well.

NCIS

I'm going to do it and will post pic's while I'm in the process.

Thanks for the education Gary,

ram3500-RCU

My Feedback: (221)

Hey pal, looking forward to it.

saramos

My understanding is that once programmed, the Thermacowl will operate without input from the receiver based on the thermocoupler attached to the engine, so an additional channel is not needed for normal operation. If you add it to a mix, or have a separate channel, then it can be operated manually.

ram3500-RCU

My Feedback: (221)

From what I see, it gets it's energy from the RX though. So it needs to be plugged into the RX. The on-line manual shows this, if I'm looking at it correctly and reading the manual right.

It would be great is this is not the case, but I think it is.

ram3500-RCU

My Feedback: (221)

Here is that video of the cowl flaps that I promised you guys. This is the first time they have actually been cycled. I'm using a servo reverser in this test. I forget which one it is. It was just one I had laying around. I don't use them as a rule anymore because of all the servo mixing capabilities built into our radios. It works fine here though.

Sorry about going inverted. Hope you guys don't get a headache.

www.youtube.com/watch?v=rVJusOgWUB0

Mustangman40

My Feedback: (1)

Pretty dang slick right there..............

JSZ

My Feedback: (73)

Very cool, can't wait do do mine.