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Feb 23, 2008, 05:09 AM
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sumomo's Avatar
Build Log

Curtiss Flying Boat


I would like to post building of Arizona Model Curtiss Model F Flying Boat.
I have got it at end of last year and started building today. I start this thread to force me to complete building without giving up on the way.
Actually this kit is not an easy one to me, but I hope I can complete it by spring.
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Feb 23, 2008, 06:04 AM
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vintage1's Avatar
Fabulous project. We will make sure you do! (finish it)
Feb 23, 2008, 07:18 AM
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portablevcb's Avatar
I'll second that

charlie
Feb 23, 2008, 09:41 AM
N96RC/N3178W
MattZC's Avatar
What's the wingspan on yours? I see on Arizona M. Website that there are 4 sizes, and the 1/12 doesn't list a wingspan. {around 40.5 in} Good Luck!
Checkin in.
~Matt
Feb 23, 2008, 02:36 PM
Two left thumbs
I will be watching too! If you have problems, there are some very good model builders here who will help, so you WILL be successful!
Feb 23, 2008, 07:52 PM
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sumomo's Avatar
Thank you everyone for your encouragements.

Mine is 1/12 scale. Wing span is about 40" and fuse is 27".
I can't squeeze bigger scale into with my car, therefore 1/12 is only my choice.
I am wondering what motor should be used. Because it is a museum model kit, even small metal parts are included. Especially, engine faithfully reflects Curtiss 1OX engine. Because I wold like to use electrical, I am wondering which motor is suitable to fit into the engine and has suitable power enough to take off her from water surface. (Engine is mounted just below the upper wing and whole engine is exposed. I do not want to spoil the scale mood by using outer-rotor motor. )
I will decide it later when expected weight become clearer.
Feb 23, 2008, 07:58 PM
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lake flyer's Avatar
75 watts per lb will ROW , maybe even less with those airfoils.
Feb 23, 2008, 08:29 PM
Two left thumbs
Quote:
Originally Posted by sumomo
Thank you everyone for your encouragements.

Mine is 1/12 scale. Wing span is about 40" and fuse is 27".
I can't squeeze bigger scale into with my car, therefore 1/12 is only my choice.
1/12 scale is big enough to produce a model that will fly well, so be happy! Your model's wingspan will be about 61 inches. I am building a 1/12 scale seaplane also. It seems big enough!
Feb 24, 2008, 02:36 AM
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sumomo's Avatar
Thanks Lake-Flyer. It will help when I decide motor.
Geoffinpdx, I measured the drawing and noticed that I forgot to add center part previously. Total wing span is 114.3cm=45". This is correct.

I spent half day to decide how to build aileron servo assembly. It will be mounted at center of fuse and pull-pull wire linkage will be connected to each aileron. Small pulleys are included to the kit.
Feb 24, 2008, 06:22 AM
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vintage1's Avatar
Go for about 150W for that. 3s 1500 pack, and something that will drive a sensible diameter prop.

You may find that a 16/15/7 ot 16/15/8 from Mega will be suitable - theyare low KV inrunners. And should maybe drive a 7-8" prop, though to be honest, I can't remember.
Feb 24, 2008, 09:31 AM
Registered User
I chose a Scorpion S2212-22 (http://www.innov8tivedesigns.com/pro...products_id=34 ) to use with a 3S battery for my (not to exceed) 32oz, 36 inch WS flying boat; not sure of your target weight. It consumed 155 watts with a APC 9x4.5E prop on 3S and produced 27 oz of thrust at 8900 rpm on a test stand without even getting warm. The motor is good for 200 watts so it would leave you a little head room if you needed a larger diameter or pitched prop.

Alan
Feb 25, 2008, 02:08 AM
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sumomo's Avatar
Thanks Vintage1 and Al. Previously I thought to use Model Motor's Mini AC1215/Extreme, because of it's small diameter which can go inside the dummy Engine. But it seems it is too powerful (and expensive). From drawing, it seems 7" is the maximum prop' can be used. Maybe I choose one of the small out-runner.
Feb 25, 2008, 04:51 AM
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vintage1's Avatar
Mmm. How much space have you got?

a 7" prop is in range on a small inrunner, and if this is light you wont need much more than 70W or so.

Ive got something of similar size running on a 7x4 wood on a United Hobbies 1300KV motor..There is JUST clearance for it inside a 30mm diameter cowling tube.

Its this one, tho mine didn't have a heat sink.

http://www.hobbycity.com/hobbycity/s...idProduct=5427

Run that off somethiong like 3s 800mAh nd you will be fine.

The other option is to use a gearbox with a long shaft, and bury the motor somewhere in the 'crankcase'
Feb 25, 2008, 07:57 AM
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portablevcb's Avatar
If you won't mind the cost an inrunner with a planetary (inline) gearbox might work.

chalie
Feb 25, 2008, 12:51 PM
Beware the Axis of Weasel.
thewildweasel's Avatar
Hey vintage1, cheers for that link, I've been looking for a pilot figure for my SU-26, and there's a perfect one there for $4! How reasonable is their shipping to the UK do you know? Don't mind if it's not the cheapest, think I may end up buying quite a lot from them all in one go...


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