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Old Feb 04, 2009, 03:20 PM
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Devon UK
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Today is kinda pivotal--I'm gonna design a soarer from scratch--watcha think?

Right guys,

This will be a laugh,
I gonna scratch design and build a soarer--I think this will probably the steepest learning curve I've ever undertaken.
Well we/us are really, what I want to hear from you lot is what would be on your wish list!!
I really want you to chuck all your ideas at me, and I'll decipher them in my own way! and scribble plan build and fly the beast.
Come with me on this journey it'll be fun, we will laugh and we wil cry together, I'll listen, I'll interpret then you can shoot me up or you can shoot me down,
Either way I'll get my jollies----GREAT

C'mon you guys have a giggle at my expence,
Fire em at me!!

PG

PS
Blame Lockers
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Old Feb 04, 2009, 03:37 PM
I need some building time in t
scaflock's Avatar
United States, AZ, Douglas
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Grooves... PM sent

Jeff
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Old Feb 04, 2009, 03:44 PM
Phil.T-tailer
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Joined Jun 2003
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Go for it - there's nothing more satisfying than to see your very own creation soaring up there.
First up though - what do you want it to do?
- thermal duration?
- F3B?
- winch/tow or bungee launch?
- DLG?
- slope?
- slope race?
- aerobatics?

I still occasionally fly my O/D thermal ship from 1974 - and it still outflys many more modern planes. No time for design & build these days though - shame.

Phil
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Old Feb 04, 2009, 06:50 PM
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Charleston, SC
Joined Nov 2007
472 Posts
What kind will it be? 2M, Open RES....??? Get a copy of Curtis Suter's design spreadsheet and LiftRoll (or Adam Till's combined design spreadsheet, which has LiftRoll built in). If you're really adventurous, try XFLR5. If you go with that, download the RC Soaring Digest with the XFLR "how to" article from about a year ago. All of these are available as shareware downloads. They will really help you get a good flying airplane the first time.

As Phil says, nothing beats flying a ship that is all your own.

Keep us posted.
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Old Feb 04, 2009, 08:51 PM
planepainter
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Mt. Juliet, TN
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PG, I had to laugh out loud at Jeff's reply - "PM sent". It was almost as if he had come across you about to jump off of a cliff and he was going to suggest that you invest in a parachute first. Really, though I am sure he had much very good advice and If you follow the suggestions of those more seasoned builders here, you should have alot of fun and have a great bird also. I was thinking of doing the same thing and found that the airfoil I was considering not a very good one and had to do some learning about sailplane airfoils to find a better one. Have fun, Don.
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Old Feb 04, 2009, 09:02 PM
I need some building time in t
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United States, AZ, Douglas
Joined Nov 2007
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Yeah Grooves, Just what kind of flying do you want to do with this new creation? That more than anything is going to dictate shape, airfoil etc. Give us an idea of what you're looking for in a plane. You know the people here are more than willing to jump in and help you out. All we ask is that you do lots of pictures of the build. Pretty cheap price for all that help!

Jeff
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Old Feb 04, 2009, 11:25 PM
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Go read the Martin Simons aerodynamics book if you haven't.
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Old Feb 05, 2009, 04:02 AM
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Devon UK
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Wow!
What a responce!!
To get a feel how I go around please check out my other thread,

http://www.rcgroups.com/forums/showthread.php?t=989472

Your opinions are well appreciated

PG
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Old Feb 05, 2009, 07:11 AM
Phil.T-tailer
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so youre gonna design an old-skool woody soarer then?
Phil
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Old Feb 05, 2009, 08:27 AM
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Devon UK
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Thinks maybe!

I was hoping for inspiration and issueing a sorta challenge by putting out my initial statement, but it came right back at me with loads questions, and to honest-good true enthusiasm
also loads of offered suggestions for referance which is brill!

Option, 1 Old skool with planking!!
Option, 2 DLG radical kevlar lay-up
Option, 3 Thermal duration

Option 2 is most appealing!!
C'mon you lot-get involved-watcha think?

PG
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Old Feb 05, 2009, 08:40 AM
AKA - The "Flywheel"
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Remember to sand it round
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Old Feb 05, 2009, 08:43 AM
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Hey Steve,

Will be well sanded!!

PG
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Old Feb 05, 2009, 08:51 AM
I need some building time in t
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United States, AZ, Douglas
Joined Nov 2007
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Well, if you want to go with a DLG design then I'd suggest that you take a look at Mark Drelas' airfoils. It's pretty much seems that "he da man" when it comes to that. He's got a series of airfoils that it seems that everyone wants to use for HL/DLG.

If you want to go with a laid up composite ship then I'm not going to be much help at all on it. I''m still "Old school" in my building style but maybe if you do a build thread on it this old dog can learn some new tricks.

Jeff
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Old Feb 05, 2009, 10:10 AM
Phil.T-tailer
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Devon, UK
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OK - sources of info/inspiration:
old-skool woody - hang around here or the thermal forum
composite wizardry - head on over to the slope forum - but you may get told to "sand it round" though (again!)
DLG - try the hand launch forum?
all sorts of ideas/techniques - see the sticky "everything" post at the top of the slope forum

Phil
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Old Feb 05, 2009, 04:38 PM
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Charleston, SC
Joined Nov 2007
472 Posts
For a first ship, I'd suggest a 2M or 2.5M. A heavy one will still fly well. With DLGs any excess weight will kill you. It's very easy to come out with a heavy ship until you get the hang of building, especially when you're slopping glass. If you haven't worked with kevlar, it can be a real pain and you really need the special shears. Carbon is actually easier (at least for me). Try regular glass for the first couple projects, then move into the exotics. I still like my old school woodies. They take longer to build and aren't strong enough for a hefty winch, but it's easy to get a structure strong enough for a highstart. Roll options 1 and 3 into one project!
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