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Home✈️Aircraft🛩️Fixed-WingFixed-Wing Main Discussion › The official plank thread.
03-31-2010 04:12 AM  10 years ago
BOB WHO?

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Downey, Ca.

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Which of two motors that I already have should I put on an Eflite Mini Ultra Stick(22-25oz)? I'm choosing between two Hoffman Magnetics 470 outrunners that I got on sale. Both weigh 82g & both say "up to 250 watts". One is has an 1100kv rating and the other is rated at 1500kv. I'm using my 450 trex batteries (25-30C 2250 mAh) and want to pick the better of the two motors for this plane. Any suggestions?
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03-31-2010 04:16 AM  10 years ago
Spitfire1

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Perth Australia

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What Kinda Hinge - Fiber type ???
Yes, thats how I would describe them.

Its too late, Ive epoxied 5 of them into one aileron. I will use some hinge tape as a fail safe, just hope some epoxy got into the slot I had to wipe a fair bit off with my finger.
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03-31-2010 04:41 AM  10 years ago
GimbalFan (RIP)

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Big Coppitt Key, FL

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The below videos are of the 3D Hobby Shop A.J. Slick 89"....the first with a 50CC engine and the second on 12S power.
I love this type of side-by-side comparison. I also love the sound of big piston engines on big-ass planks -- and I agree that on smaller planks ePower rules.

But on 7 lb'ers and larger, for me it's pretty much a toss-up between a sound that sprouts massive RC wood, and HP/WT ratios which sprout bigger wood.

Either way, Massive RC Wood rules.
op-thwop-thwop-thwop-thwop-thwop-thwop-thwop-thwop-thwop-thwop-thwop-thwop-t
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03-31-2010 04:42 AM  10 years ago
fla heli boy

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cape coral, florida

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grey eagle is right. With the fibre hinges, you install into either the wing, or the aileron (or stab, whatever), hit it with CA and let it cure. Slide the other surface onto the the hinge, get it lined up where you want it (the whole surface) then hit all hinges on the other half with CA. They actually work VERY well. Don't think you'll be happy with using epoxy. Now if you used those Du-Bro types shown above, epoxy is the way to go because the holes will act as "pins" to hold the hole thing together.
I didn't like the idea of the fabric hinges until I used them. What a walk in the park with those things. They will NEVER pull out either.
Now when you get into bigger stuff, that's different. Then I actually permanently pinned the hinge halves into each surface, but that was getting into 30-35% planks. Different animal altogether.
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03-31-2010 04:43 AM  10 years ago
HeliFisher

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Verdi , Nevadafornia

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Next time........
(Of course, right?) Maybe try the fast-cure Gorilla Glue. I think it comes on white and clear, I've used the white. This stuff expands a little, so a little bit in the hole before inserting your hinge, should expand and grab all the little ridges. Some tape to keep the expansion under control and hold the hinge in place should work fine.

**Disclaimer part**
I've used this glue on my foamies only and have not tried this technique for balsa models, but the glue is really good stuff. It's stronger than whatever it is you're gluing together, I promise.
The less a man makes a clarative statement, the less likely he is to look like a fool in retrospect.
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03-31-2010 04:54 AM  10 years ago
fla heli boy

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cape coral, florida

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BUT....with the fibre hinges, what you are trying to do is to get the thin CA to actually "wick" into the fibre and the wood on both sides of the hinge. It literally locks them into the balsa. Trust me, I've made a mistake and tried to pull them out with pliers. No go. I had to cut them off with a knife and relocate the hinge to fresh wood.
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03-31-2010 12:27 PM  10 years ago
bmapope

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TN

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Greyeagle explains it to a T!
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04-01-2010 12:53 AM  10 years ago
racin06

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Indianapolis, Indiana

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Which of two motors that I already have should I put on an Eflite Mini Ultra Stick(22-25oz)? I'm choosing between two Hoffman Magnetics 470 outrunners that I got on sale. Both weigh 82g & both say "up to 250 watts". One is has an 1100kv rating and the other is rated at 1500kv. I'm using my 450 trex batteries (25-30C 2250 mAh) and want to pick the better of the two motors for this plane. Any suggestions?
The 1100Kv will require a larger prop versus the 1500Kv. So, if you are looking to perform 3D/high alpha flying, the 1100 is the way to go. The larger prop is moving more air, which means more thrust. However, if you are looking for a fast airplane and are looking to perform more sport flying then the 1500Kv with a smaller prop is the way to go.
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04-01-2010 02:05 AM  10 years ago
BOB WHO?

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Downey, Ca.

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Thanks Jim
I'm not sure what flying style suits that model best. I've heard only good things about that Mini Ultra Stick but I don't know if it is capable of hardcore 3D. Maybe I'll try the 1100kv, what do you think?
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04-01-2010 03:28 AM  10 years ago
tryan02

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Canton, Missouri

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I read JW you talked about medium CA be careful with that!!!!!

Its OK with the little stuff but on bigger planes DO NOT USE MED!!!

Use fast so it will wick by wick I mean filling the whole hinge with glue soaking into the fiber of the hinge and making a perfect bond with the balsa.

Oh and after you do that it is important to bend the control surface back and forth as far as it will go. You dont want the hinge to go stiff in the center it could crack and split.

Like I said maybe not important until you get into heavy planes with a lot of surface deflection.

Bob Who I am not sure which stick you are referring to bu most are considered fun flyers not really 3D compare the wing square inches to a 3D plane I think you will find the stick has less surface area and the control surfaces tend to be a bit smaller.
No Really I am the club President!!!
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04-01-2010 05:23 AM  10 years ago
BOB WHO?

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Downey, Ca.

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You're right, it's an aerobatic sport flyer with a 38" wingspan. Nothing but positive reviews. So since it's not 3D capable would a guy want an 1100kv motor with a 11x8 prop or a 1500kv motor with 9x7 prop? I have both motors I'm just deciding which to install. I'm confused about what the differences in performance will be; lower rpms w/larger prop or higher rpms w/smaller prop? Sorry about repeating the question.
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04-02-2010 12:15 AM  10 years ago
tryan02

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Canton, Missouri

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That 11 x 8 is gonna pull some serious amps!!!!

I would check the motor specs what prop they are calling for. Longer prop is gonna give you more power More wind over the wings shorter prop will rev up quicker give you more speed. But I do believe the sticks are short stubby taildraggers so look how much ground clearance you have.

Me personally I hate underpowered planes I would rather go bigger and pull the throttle stick back. The only time I go full power on my trojan is to show off it needs less than half the power its got.
No Really I am the club President!!!
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04-02-2010 02:47 AM  10 years ago
GREYEAGLE

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Flat Land's

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Now this is a quality FUN flyer - Good 3D bird
This is the Nastiest Snake bit thing I've ever flown, makes a great trainer to learn everything you thought you knew but you really didn't. Put's landing hot war birds to shame !

Over weight,severe high wing loading, pit-a- fully underpowered.

Balance is never understood , has factory declanage - bent into the boom, a homely lite 20cc that cry's mercy all the time, and double tapered wings.

Must have factory option's like a flap that goe's 60% via an on and off toggle. Ever changing flight conditions depending on wind and speed. Panic is fun !!! No flap - 150 yards " maybe" with flaps " pop -up dead stop stall w /high alpha"

We learned a-lot trying to get the 1st successful downwind turn.

Best part are the 35mph ground loop's and peeling up the turf

It's now a reputable signature plane IF you Get it around the patch - you get to sign your 1st name, but take off and land you get to sign 1st and last . Lot's of first names just a few full name's most underlined with brown stripes.
greyeagle
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04-04-2010 04:12 AM  10 years ago
racin06

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Indianapolis, Indiana

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Today I got together with Spencer and his father to get in a couple of flights. Winds were 12-15 mph, gusting up to 25 mph. Not ideal flying conditions. Neverthless, we had a great time. Below are a couple of videos of me flying my Kalteisen EPP Extra 260 and a video of Spencer doing a good job of flying his Parkzone T-28 Trojan.

Watch at YouTube

Watch at YouTube

Watch at YouTube

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04-06-2010 01:07 AM  10 years ago
Spitfire1

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Perth Australia

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Success at last , managed to get through 2 flights without incident with my rc lander f16.

The trick is no sudden stick movements, its very hard to resist the natural instinct to correct the same with a prop plane, very tiny stick movements or it starts tumbleing.

I was expecting to crash and use the receiver in my new Mx2, now I have to figure out where to get another receiver, Ive already cannabalized my helis.
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04-06-2010 01:26 AM  10 years ago
bmapope

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TN

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Ive already cannabalized my helis.
now that is just WRONG!
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04-06-2010 04:30 AM  10 years ago
Spitfire1

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Perth Australia

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^
Yeah I know, I will get back to the helis soon.

All I have is a trex 600e on 6s thats flyable right now and it doesent do it for me anymore, too heavy and slow.

When I can get some funds to get my 500 size going again Il fork out on another receiver, I dont like flying 600`s anymore after flying a 500 for a while my 600 feels like poo in the air.
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04-06-2010 04:35 AM  10 years ago
Spitfire1

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Perth Australia

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Dont suppose anyone knows how to get decals off wings without ripping the covering off

Im thinking of peeling a bit up and then useing soapy water with a brush under the sticker, not sure if it will work though.

EDIT: its OK Ive figured it out, the trick is not to pull upward then it doesent stretch the covering up.
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04-06-2010 04:59 AM  10 years ago
GREYEAGLE

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Flat Land's

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Easy
Just warm them up / piece of cake.
greyeagle
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04-06-2010 11:06 PM  10 years ago
racin06

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Indianapolis, Indiana

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Today is my birthday and my wife surprised me with one heck of a birthday gift...the Precision Aerobatics Extra MX! I can't wait to get this airplane in the air!

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