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Old 10-17-2011, 01:45 PM   #1201
paulbipe
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Hi All,

We had our first indoor of the season last night..WOOHOOOO...NO WIND!!!

I was wondering if you could get away with not using the X bracing from the wings to the body if you used a flat strip of carbon fiber in the wind as a spar (placed edge on into the foam). I weighed the flat section of CF and it was lighter that the X-brace that I removed. Anyone tried this?

My other thought was to use two servos on the ailerons (one per side) as it gives more flexibility for using the mixes in the radio. At an admitted 4gram penalty. But will allow a pull-pull set-up so I save the weight of two push-rods.

I am also going to build a 26" plane and see how it works in our gym. the 30" size just looks big.

Paul
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Old 10-17-2011, 01:59 PM   #1202
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Re: Blue Foamie

Quote:
Originally Posted by paulbipe View Post
Hi All,

We had our first indoor of the season last night..WOOHOOOO...NO WIND!!!

I was wondering if you could get away with not using the X bracing from the wings to the body if you used a flat strip of carbon fiber in the wind as a spar (placed edge on into the foam). I weighed the flat section of CF and it was lighter that the X-brace that I removed. Anyone tried this?

My other thought was to use two servos on the ailerons (one per side) as it gives more flexibility for using the mixes in the radio. At an admitted 4gram penalty. But will allow a pull-pull set-up so I save the weight of two push-rods.

I am also going to build a 26" plane and see how it works in our gym. the 30" size just looks big. Paul
Hi Paul
I've tried many different ways and realized the x pattern is more efficient, the only thing I found to be a real benefit is some carbon bracing on each side of the fuse with 3 or 4 pieces of 1 mm CF. on each side, from the wing root to the horizontal stab. I'll post a picture later.
If you can, let us know how it turns out.
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Old 10-18-2011, 07:04 AM   #1203
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Re: Blue Foamie

Hey, by golly, dare dat GASTON n his new color... And, Gisel, good to see her at your events again......
Lucky guys, started already with your indoor, ours is still 4 weeks away, goldern....
Have re radioed my old Hangar Rat, the enlarged one, and am waiting with good feelings on it's first indoor flight on the 20th of November....
Aint heard from our guys yet, well, a couple, who are joining us this year, but it's still early for them, I guess....
Oh for those warm windless indoor days............................
Keep the pics comin Gas...
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Old 10-18-2011, 11:30 AM   #1204
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Re: Blue Foamie

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Hey, by golly, dare dat GASTON n his new color... And, Gisel, good to see her at your events again......
Lucky guys, started already with your indoor, ours is still 4 weeks away, goldern....
Have re radioed my old Hangar Rat, the enlarged one, and am waiting with good feelings on it's first indoor flight on the 20th of November....
Aint heard from our guys yet, well, a couple, who are joining us this year, but it's still early for them, I guess....
Oh for those warm windless indoor days............................
Keep the pics comin Gas...
Nice to hear from you Art, I'm hoping to be able to make the trip again this winter, I'll keep you posted.
Gaston
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Old 10-24-2011, 12:13 PM   #1205
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Re: Blue Foamie

Well I got the plane finished and tried it last night in the gym, and it exceeded my expectations. For a standard high school gym the 26" wingspan seems right as I was able to do several slow rolls down the length of the floor Looping was tight and hovering was almost hands off.

The basic specs are: White foam board ($ store), span and length were both 26". Airframe weight about 45 gms and all up weight (less battery) of 105gms.
4- 4gm servos all using pull-pull set-up, This give me the ability to ad some mixing. 2300kv motor and a 7x3 prop. Single wheel. Instead of using X bracing under the wing I set some 1x6mm cf flat section into the leading edge and the training edge area of the wing. you can see it on the picture of the underside of the plane. On a heavy pullout the wings did not flex, or if they did it was not enough to be noticed. The general comment was that this "looked" to be the right size for the gym.

With some milling I should be able to get this down to 80gms plus battery.

Paul
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Old 10-24-2011, 02:53 PM   #1206
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Re: Blue Foamie

Hi Paul
That's really good, considering you're using a servo for each aileron, I assume you removed the backing from the foam board, looks good.
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Old 10-24-2011, 04:06 PM   #1207
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Re: Blue Foamie

Hi Gaston,

Yup, I washed the backing off the board using Windex. Part of the reasoning for using the 4th servo was to try to stiffen up the aileron response. I had been using some thin cf rod and it was prone to bending so I considered a thicker rod but when I weighed the rod vs the servo the servo ended up only costing me about 2 gms. I will take the 2gm penalty for the better aileron action plus the ability to mix aileron to elevator etc anytime.

I am going to try some side force generators next session and see how they workout.

The single wheel works well for landing and take-offs and the side force generators will help keep the wings level on the initial take off run.

Paul
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Old 10-24-2011, 05:23 PM   #1208
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Re: Blue Foamie

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Originally Posted by paulbipe View Post
Hi Gaston,

Yup, I washed the backing off the board using Windex. Part of the reasoning for using the 4th servo was to try to stiffen up the aileron response. I had been using some thin cf rod and it was prone to bending so I considered a thicker rod but when I weighed the rod vs the servo the servo ended up only costing me about 2 gms. I will take the 2gm penalty for the better aileron action plus the ability to mix aileron to elevator etc anytime.

I am going to try some side force generators next session and see how they workout.

The single wheel works well for landing and take-offs and the side force generators will help keep the wings level on the initial take off run.

Paul
I'm glad to see people like you experiment with innovative ideas, 2 grams is surely not a big penalty for the results you're getting, it's awesome, keep it up, thanks for sharing.
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Old 10-25-2011, 07:40 PM   #1209
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Re: Blue Foamie

Even though nice weather kept many people away from the gym, we still had at least 12 indoor enthusiasts last weekend. We even had a finned visitor, as you can see in the picture, the ceilings fans were trying to turn it into a tuna salad but it escaped without a scratch.


From left to right.
Gisel, always smiling, Steph's plane and mine hovering and the fish.
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Old 10-29-2011, 11:07 PM   #1210
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Re: Blue Foamie

Gaston, I see the indoor flying scene here is still good, new design looks nice. I just entered university this year so I had to give up almost all but 1 plane. The yak served me very well, had over well over 100 flights. Yesterday I was flipping through my videos and came upon this again, the music doesnt help but it was such nice flying plane.

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