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Home✈️Aircraft🛩️Fixed-WingFixed-Wing Main Discussion › The official plank thread.
02-24-2010 04:14 PM  10 years ago
Cope

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South Lake Tahoe CA

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Thanks guys.

instead of large scale I should have said 25%er. I'm not concerned with scale design.

I do have an 8x4' pickup bed to transport what ever model I pick.

Size in the house would be an issue, I tend to hangar rash my 40" planes just moving them around. I think when I grab a foamy plank I'm just not as careful as I am when picking up one of my 90s....

The cost of servos did cross my mind..

Thanks for the thinking points guys, no one in my "Club" is into large planes so I appreciate all the help.
Fear is the little death,The mind killer. I will allow my fear to pass through me.Only I will remain
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03-01-2010 01:06 AM  10 years ago
racin06

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Indianapolis, Indiana

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Spencer, Marty and I met up today for a few plank flights. Weather conditions...overcast, 34F, winds 10-12 mph gusting to 17 mph. Not the best conditions to fly and it was cold . Anyway, the first video is Spencer flying his Parkzone T-28 Trojan and rather well considering the wind . The landing was a little interesting, but all in all, a successful flight.

The second video is me maideining my Kalteison EPP Extra 260. No aerobatics, just getting accustomed to the 260. My video camera battery went dead and I was unable to get our second flights recorded. However, I will say the 260 is very impressive...very tight loops, roll rates out of this world , harriers like a champ, stable inverted FF, knife-edges with very little rudder and hovering?...well, I wasn't able to do much hovering due to the high winds. I just need more practice hovering in the wind. I'll get it sooner or later.

Watch at YouTube

Watch at YouTube

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03-01-2010 01:12 AM  10 years ago
tzclark

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Chilliwack British Columbia

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I tried flying my PZ typhoon the other day in the wind. Lets just say the wind got the better of that poor plank.I would rather be in a boat, with a drink on the rocks, then in the drink, with a boat on the rocks!
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03-01-2010 01:23 AM  10 years ago
GimbalFan (RIP)

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Big Coppitt Key, FL

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Not the best conditions to fly and it was cold
Looks like great fun even in stiff wind. To me, any wind less than a plank's stall speed is fine & dandy -- and when you think about it, a near stall speed headwind saves a lot of wear and tear on the wheel bearings.
op-thwop-thwop-thwop-thwop-thwop-thwop-thwop-thwop-thwop-thwop-thwop-thwop-t
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03-01-2010 01:43 AM  10 years ago
bmapope

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TN

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Although I still cant find a good indoor model so maybe its just me.
I fly all styles, from a 35% Wildhare Edge 540 (see gallery) to indoor foamies. As far as a great indoor foamie go to fancyfoam.com and get the blender or the vrolet, both incredible bipes. Rctimer get a 2300kv and a 10amp esc with a 2 cell 300 mah battery and enjoy!
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03-01-2010 01:44 AM  10 years ago
tryan02

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Canton, Missouri

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You guy's need more power argh! argh! argh!

I forgot how lame a stock t-28 was until seeing that vid. Throwing the gear in the trash and upgrading the PZ motor to a Great planes rimfire .10 made it a whole new plane. You can fly mine right out of your hand straight up and it flies in 25mph wind. Not to mention its cool to repurpose a plane instead of giving up on it. Mine will almost keep up with a PZ stryker now. Thats what happens though when you go from a less than 200W motor to over 400W.

Oh but if you do this you must I repeat you must permanently fix the wings to the fuse. Found this out after a hard snap roll.
No Really I am the club President!!!
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03-01-2010 02:10 AM  10 years ago
hbk2owner

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indianapolis, Indiana

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it was the battery i was flying. it seemed kind weak on power more than usual. but after that flight it had more power.
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03-01-2010 02:13 AM  10 years ago
racin06

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Indianapolis, Indiana

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The stock T-28 may need more power, but my Extra 260 has more than enough power. During most of the video above, I'm flying around 1/2 throttle into the wind. I did kick it up to about 3/4 throttle at one moment and the 260 let me know that it certainly isn't lacking power .
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03-01-2010 02:16 AM  10 years ago
hbk2owner

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indianapolis, Indiana

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next time i want to see how fast you can get it going Jim. O and Jim I will Give you your inverted circut.
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03-02-2010 02:25 AM  10 years ago
tryan02

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Canton, Missouri

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I still have a foot of snow on the ground with a new hangar 9 P-47 4stroke saito 100 and my favorite plane is dying to get airborn again my Extra 260 G-26 gasser. Who may be getting the CRRC GF40i upgrade 26 to 40cc for less $$$ and a pound lighter than the Zenoah.

Hey Jim how bout you get a 3D gasser for this year.
No Really I am the club President!!!
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03-02-2010 02:09 PM  10 years ago
racin06

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Indianapolis, Indiana

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I'd love to have a 3D gasser, but that means balsa. I'm going to bang around the 3D foamy airplanes this year and perfect some things like hovering, rolling harriers and rolling circles. Then I'll be ready for some balsa action .
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03-03-2010 10:21 AM  10 years ago
GimbalFan (RIP)

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Big Coppitt Key, FL

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A 'Ring Wing'
Stumbled across this while stumbling 'round the 'tube . . .

op-thwop-thwop-thwop-thwop-thwop-thwop-thwop-thwop-thwop-thwop-thwop-thwop-t
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03-04-2010 11:22 PM  10 years ago
tryan02

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Canton, Missouri

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Ordered me a new engine guy's at the club been ordering them like crazy!!!

(anyone here bought one of these?

CRRC GF40i Weighs about a pound less than a G26 magneto and its 40CC!! Its a kit motor you build yourself not much too it and they can be bought and shipped for $189 on alibaba.com.

Going from a 16" prop to an 18" on a 40CC should turn my good flying gasser into a 3D monster!!
No Really I am the club President!!!
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03-05-2010 01:35 AM  10 years ago
racin06

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Indianapolis, Indiana

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Got a couple of flights in on my new Kalteisen EPP Extra 260 this evening. My wife offered to operate the camera (thanks, dear!). I'm still a work in progress on performing high-alpha maneuvers, such as harriers, inverted harriers and hovering. I came down moderately hard on the attempted harrier landing at the end of the first flight, but not too ugly of a landing. I also made a good save at 2:10 into the next flight. The harrier landing was much better at the end of the second flight, as well. I'm definately getting better and have learned that hovering an airplane is no easy task, regardless of how much heli experience a person may have. Two totally different types of hovering. Anyway, I'm having a blast flying the 260!

Watch at YouTube

Watch at YouTube

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03-05-2010 01:51 AM  10 years ago
jwhitacre

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Tarentum,PA- US

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Hovering a plane takes pratice to get right just like a heli but it will come It looks like you are getting pretty comfortable inverted it's just rolling out that looks awkward.Depleting the world of parts, one crash at a time!!
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03-05-2010 03:05 PM  10 years ago
BOB WHO?

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Downey, Ca.

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I was looking for a place to ask a plank question and here it is. I notice that 480 motors from most mfgs, for example, come with KV ratings of approx 910, 1140, 1350, 1550, 1850 etc. and they all weigh the same. The recommended model's weight for all of these motors are the same but the recommended props for these motors are slightly different in size and pitch. It seems that the higher rpm motors require smaller props. Is there some kind of formula besides starting in the range and just trying different props out? Does anyone know what the benefit or disadvantage is of a higher or lower KV motor in a model? What are the flight characteristics and do the flight times vary? The main question is about prop selection with the higher KV motors.
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03-05-2010 11:09 PM  10 years ago
tryan02

rrProfessor

Canton, Missouri

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How fast you want to go and how much power you want that is the question.

here is a great website for checking what motor/esc combo to get.
http://www.electrifly.com/powersyst...stem-index.html

I f'n hate KV ratings!!!! its rpm per volt period. So thats how you pick your KV or truthfully rpm/volt rating. Then after that you want to pick a prop within a pitch range that wont overcurrent and burn the motor or ESC.

"more prop more current"
On my parkzone t-28 I bought more than twice the motor and used the same prop to be safe.

The best way to pick a motor is watt per pound.

If the motor doesnt give watts take your battery voltage and multiply by motor current to get watts.

50-70 watts per pound; Minimum level of power for decent performance, good for lightly loaded slow flyer and park flyer models

70-90 watts per pound; Trainer and slow flying scale models

90-110 watts per pound; Sport aerobatic and fast flying scale models

110-130 watts per pound; Advanced aerobatic and high-speed models

130-150 watts per pound; Lightly loaded 3D models and ducted fans

150-200+ watts per pound; Unlimited performance 3D and aerobatic models

I hope I got an answer to your question in there if not try me again.
No Really I am the club President!!!
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03-06-2010 03:15 AM  10 years ago
BOB WHO?

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Downey, Ca.

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You're a little too far ahead of me tyran. What are the specs of the motor you put in your T-28?
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03-09-2010 01:30 AM  10 years ago
BOB WHO?

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Downey, Ca.

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Can anyone explain how you figure the watts a motor will pull? I put a 490 outrunner with a 1140 KV rating in a T-28. I'm trying to put the correct prop on it and don't want it to eat up my batteries. The plane flies fast, maybe too fast, with this motor. I already puffed an old battery. I always check my batteries after a 4-5min flight and haven't discharged below 3.75v per cell yet. I'm trying to figure how to put the right components together.
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03-09-2010 01:40 AM  10 years ago
GimbalFan (RIP)

rrProfessor

Big Coppitt Key, FL

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Here's a few free online motor/prop/ESC calculators. I like the first one most, but when the time comes to buy components I usually plug the numbers into several of 'em for a consensus.

op-thwop-thwop-thwop-thwop-thwop-thwop-thwop-thwop-thwop-thwop-thwop-thwop-t
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Home✈️Aircraft🛩️Fixed-WingFixed-Wing Main Discussion › The official plank thread.
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