Greg, thanks! I bet you fly the same...we are similar vintage/maturity, haha. We had rain this weekend, so I hope to get to practice with my Intruder tomorrow (I'm retired) for our Saturday "show" for the public. Jon

Mike, really nice job on recovering, and I like the replacement canopy. Hope I can find one of those somewhere online since the stock canopy is so thin. Mine already cracked right around one of the mounting screws. I have reinforced the complete edge of the canopy with fiberglass tape and epoxy resin to make it last longer. Jon

My canopy seems to be holding up pretty well, but my stabilizer is getting shakey. Thinking about making it a "fixed" stabilizer.

Greg

Although I like Kirkland's original color scheme, (I actually was the one responsible for telling the folks at World Models about it when working with them before the Intruder was re-introduced), and my first Intruder had that scheme, my next Intruder is going to have a different color scheme. I've seen so many orange/black/and white Intruders at SPA contests since it came out, that I just have to do something different next time.

The Sig WWII canopies are the ones I use on my SPA planes, and on Ed Kazmirski's Simla, (all the Simla kits now come with the Sig WWII canopy...cut down quite a bit to give that "bubble" look.

Duane

Normally I shy away from all these different colors used together...but WOW...look at this multi-colored scheme!![X(]

Can't remember the pilot, but hope he comes forward. Looks like a lot of work and thought to get this combination.

Duane

Duane,

If memory serves, that's Crankpin's Intruder.


Rob

What mount do guys use when side mounting the FS engines?
Chris...

You might get a lot of different answers. If a plane doesn't come with a mount, or if the stock engine mount looks like crap to me, I always seem to choose the Great Planes adjustable mount that comes in several sizes at least.

Regarding different color schemes, nobody has the WM Intruder in my club, so they and I like the stock scheme since for now, it is unique to us. If my covering wears out, I'll try out a new scheme for sure. It seems to be holding up well so far. Jon

My ARF arrived without the set screws for aliigning the horizontal. Has anyone else had this problelm and, if so, how did you fix it?
Secondly, I've never had to deal with setting angle of incidence. Is there a reference to guide me through it?

RJ

Hey Duane. The Intruder is mine, I have a few more, different schemes, you probably have seen them. Wow, this is going back a few months.

Vince, (Crank)

RJ - You may want to just epoxy the stab in. Normal procedure, wing on saddle, use as the horizontal level, set stab up. I have some other methods here, don't do the intruders much anymore, good flying plane. This is all Intruder stuff, modified.
Crank

Crankpin,
Many thanks for the advice and pictures. I noticed that you mounted your engines upright. Ihave a Saito .91FS to mount on mine and was wondering if there is a disadvantage to the recommended inverted mounting?

Also noticed the rear mounted servos. Is there a CG issue with this bird?

RJ

Hey RJ. On the CG, not really. On a bird like this, if the nose drops when holding at the wingtips, it is good to go. I know, guys use the fancy balance machines, etc., that is good for anyone. I just get it where the plans call for the CG, and try to get it level. Now I am into some bigger gas stuff, and really pay attention to what the other gas guys tell me. Depending on what you are going to do with the Intruder, sport flying, just play with the CG a little.
Some guys will keep moving it back a little at a time, for nice rolls. I am not a pro here, just average flyer.

On the engine, easy upright mount, saves a lot of problems. I use all OS 61SF's in these birds and other classic planes. Glass and foam stuff, mounted sideways, that is usually the way what I build was molded like that, most always beam mounts. Putting a 4C in there, maybe side mount may be better for you. Do you belong to the senior pattern association? Get on board if not, and even if you don't do any contests, you can get a lot of info from the newsletter, and talking to the other guys that fly this kind of stuff all the time.
The Intruder in the hands of a capable flyer, wins contests. You can use the battery pack to adjust your CG, fore or aft. On one of these, I have the battery pack up inside the canopy. On the rear mounted servos, I just did that for something different, and pull pull rudder. The later model Intruder ARF's have the tubes inside, and that works good too.
Vince

Thanks again Vince. All good info. Ifly SPAcontests but, haven't joined the org. yet. Guess I need to do that. We have a group of folks in our club who fly SPA but, nobody Iknow flys the Intruder. I need post a message on our web site and see what Ican find.
Iusually fly IMACwith a 50cc bird but, I also like the SPAstyle. This is my second Intruder. I knoced the vertical off the old one via ceiling fan and decided to start new rather than repair. That airframe was old and needed recovering any way. I may get the urge one day to repair and recover it to have a back-up. It was given to me and I put all of the electics in it with a new canopy and fuel tank and it flew very well. I used an OS .61FX on the old one but, it was mounted inverted. Folks said it would give me problems mounted that way but, it worked very well for me. Isold the OS and bought the .91 FS because Ireally like the way they sound and perform. However, I wish Ihad kept the OS. It was in great condition and ran like a top.
Ineed to investigate the side mount. It seems to provide some advantages over inverted or normal.

Thanks again,
Garry

The Intruder I built 3-5 years ago came without set screws for the stab also. You can find metric set screws at good hardware stores. I forget what size but probably 3-4 MM. They need to be about 1/2 - 3/4 inch long to have enough thread as I remember.
Dave

Ceilng fans. We have some. My brother down in Miami, finished a very nice scale Cub. Now he is a real airplane nut, A&P guy, has rebuilt Stearmans, you name it, big jets, small jets, etc., just like a lot of Aviation guys. He was putting the finished Cub together in his house, out of the shop. I think going to take some pictures. This is about a 83" Cub, lot of scratch built mechanics in it. He gets it together, cradles it in his arms, stands up, whamo ! Right into the ceiling fan. He was fit to be tied, for his not looking, it was a long repair job.
Crank

Oh man, what a pitty about the Cub. Glad he got it repaired. I know other guys who have admitted to doing the same thing with various parts of their planes. Maybe we could start a support group and call it "Victims of the Fan" or maybe "Bashed by the Blade"?

On the advice of the guys on the Saito Club thread, Imounted it inverted. They say "no worries", just be careful of hydrolock. Once running they say it doesn't matter. I use an electric starter and don't have to worry about choking it. Just crack the throttle and spin away. Once it's been started for the day it will crank right up with about a 2 sec. spin. I've learned my lesson on hand propping a 4 stroke. Ihave two Saito FA-80's (high compression version) and they will definately leave a mark when they pop back. Oooooo it smarts.

I'm about 80% complete with assembly. I need to level the horizontal, install the vertical, run the throttle rod, and buy a new receiver. Last night I found that both of my "spare" AR 7000 receivers were DOA. They've both been in a wreck so, Ishould have expected it.

RJ

burtona,
I'm embarassed to say this but, I found the set screws in the holes where they belong. (duh) I found the correct sized hex wrench and, by gosh, there they were. So, it looks like I'm all set to to adjust the angle of incidence on the horizontal. The manual tells how to adjust it but, doesn't say where. Iassume I'm looking for zero incidence? I guess the first flight will tell one way or the other.

RJ

All most ready to fly. She's complete except for the receiver and CG balance. Iran the Saito .91 today and it's a real winner. Starts easy and initial tune went very well. It's a used engine so, no break-in process to worry with. I'm just adjusting top end and getting the idle set. She runs smooth and pulls very strong with a 13x8 prop. I think this engine is a keeper.
I still don't know the process for setting the horizontal incidence correctly. Until Ican get and incidence meter and set it properly, I've leveled it with the wings so, what eve the wing is set at the horizontal is the same. I should have time to work that out while I'm waiting for a new receiver. Ialso need to set the CG but, can't do that until Iget the receiver and a new battery.

RJ

RJ, heres what you should do. Back in the day, when this model first came out, lot of us jumped on it. There is a lot of info on the stab incidence, here on RCU. On this forum, at the top, search subject space, type in Intruder, Stab Incidence. Also, use other search words. A lot of info will come up. I epoxied the stabs in, and did not fly it first. I am sure that nose weight will be different from one engine to another. IMHO, just eye it up, look straight, OK, fly it. A few clicks of up or down on the elevator can determine where to set it after flying it. I realize some engineer types will cringe at the "eye it up, fly it", we are not going to the moon here.

Below was posted back in 2007, by Mike Robinson, stab discussion after initial flights. Lot of info on here, just search around.
Crank
================================================== ================================================== =================================================

RE: World A-6 Intruder
Intruder I got to make the first trim flights on my Intruder yesterday (Monday 9th). The weather... up elevator as mentioned before. Got out the allen wrench and adjusted more down incidence into the horizontal stab and moved my trim tabs back to neutral - No up elevator showing. Flight three let me know real quick that the horizontal stab adjustment was the right thing to do.
Posted on: 4/14/2007 7:55 PM by Author "ShineyObject" in the forum "Classic RC Pattern Flying"
http://www.rcuniverse.com/forum/fb.asp?m=5716023

Crankpin,
Where the heck did you find that bit of gold info? I searched this thread thoroughly and came up with some info but, nothing like this. I found some info about 3 deg. vs. 0 deg. etc. but, nothing like this. Is there another thread Ishould be looking at? The earliest thread Ifound on the subject was sometime in 2010.
Anyway, thanks a bunch for that link. I really appreciate it. I'll be doing the "fly it and try it" method.
By the way ....which way is positive incidence?

Garry

On the RCU Forums, go to classic pattern flying. At the top left, punch in the words you will research. You can do it on the whole site, before moving to single subject. Type in anything, example: [/b]World Intruder Stab Incidence[b]

Type in, World Intruder build thread. You may come up with one of mine, where it is stripped and new skins. All subjects will source the words for you, just do some experimenting. Start it up, power up, let it go, see what happens, trim from tx, make linkage or CG adjustments after a few flights. It lands great, just let it sink, add or reduce power, hit the spot.

Crank

Vince,
Thanks again for your help. Ishould have known there would be more than one thread for this bird. As SPAgrows and the number of ARFs and Kits are limited, the Intruder appears to be enjoying a resurgence in popularity. I think it's the least expensive ARF (and one of the best) on the market right now and it's a great flying bird.

Do you still fly your Intruder? Is SPAacive in your area?

Due to growing interest in SPA in our region (TX, OK, AR), SPAhas allowed us to establish a new region ..."SPA West". Last year we had quite a few well attended contests and our club alone hosted 3 contests ....including the "Ft. Worth Open" which is our version of the Masters.
Ifly IMACand SPA and both venues have made me a much better pilot. Practicing not only improves my skills but, it gives me something to do other than just bore holes in the sky.

By the way ....great pics. Thanks for posting.

Garry

We at Golden Triangle RC Club, Grand Prairie, TX will host a SPA contest this year also. A date will be set once I get with the other CDs in the area.

Frank

That's great Frank. I'm looking forward to attending. Be sure to let us know when it will be held.

Garry

rowdyjoe good luck on your maiden. I have a OS91SurpassII inverted in my Intruder and it flies the plane well, and never has fuel flow problems. I am not a pattern competitor, just a guy who likes to emulate pattern and fly the plane rather than have the plane lead me around. The Intruder is one of my faves for just flying on a rail like we are apt to say, and having little or no coupling in KE. And mine floats in for landings too. Just a great airframe. Here is a movie of mine...just to whet your appetite. Jon
[youtube]http://www.youtube.com/watch?v=JnuinA0l_Vo[/youtube]