prop advise needed

Technical questions, advice, sharing information etc (aircraft, engines, instruments, weather and such)
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Kingfisher
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Re: prop advise needed

Postby Kingfisher » Sun Jun 21, 2009 9:02 pm

If ground clearance is what you want , fit a bungee suspension to the rear axles , available from SoloWings. It lifts the rear end quite a bit and gives a better ground ride. My Windlass has a 3 blade IVO prop 72" and it has quite a bit of ground clearance. The engine sits upside down (standard).
If the prop gives you adequite climb & cruise which it should at sea level , dont change it for just the sake of change.
My 2c.
kiwilad
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Re: prop advise needed

Postby kiwilad » Mon Jun 22, 2009 10:48 am

Yes,I think I will fly it with the current prop and see if it does what is required,will look at another prop if it doesnt. While on the windlass subject can anyone quote me the official 1 - VNE
2- Stall speed
3- Max take off weight
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Morph
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Re: prop advise needed

Postby Morph » Mon Jun 22, 2009 11:13 am

http://www.solowings.co.za/products/windlasspecs.html


You will have to test fly your particular aircraft to determine it's own specifications especially wrt stall speed as every aircraft is different
Greg Perkins
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Wargames
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Re: prop advise needed

Postby Wargames » Mon Jun 22, 2009 12:56 pm

kiwilad wrote:Yes,I think I will fly it with the current prop and see if it does what is required,will look at another prop if it doesnt. While on the windlass subject can anyone quote me the official 1 - VNE
2- Stall speed
3- Max take off weight
Have to agree with morph.

Every wing is different wrt batten profiles and hangpoint position, tightness of the bungees on the battens and tension on the wing. All these factors will influence your performance.

My POH states vne as 140kmh(87mph). This might vary with your config. I don't go above 75mph as a safety margin.

Your stall would be anywhere from 34mph - 40mph.

Don't worry to much about these technical issues. The plane flies itself, and if your windlass is happy, you should be too.

Regards,
The Naked Trike
ZU-AVL
"I hate CIRCLIPS!!"
kiwilad
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Re: prop advise needed

Postby kiwilad » Tue Jun 23, 2009 11:02 am

I need the imformation to satisfy CAA,no other reason.Have to have a placard attached to the airframe stating all of the above plus more.This place is getting more like the USA every day. Thank you all for the info supplied (^^)
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Morph
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Re: prop advise needed

Postby Morph » Tue Jun 23, 2009 12:18 pm

I understand

Here in South Africa the process is as follows
1. If building the aircraft apply for a build number
2. When 75% complete registration and get the registration number, all the while having inspections by relevant AP
3. Once complete, Apply to CAA for a "Proving Flight Authority" normally 40 hours
4. Test fly the plane following the prescribed testing process to determine all these numbers for your particular aicraft
5. Apply for first Authority To Fly, this is where you have to submit all the documentation, POH, attach relevant placards etc
Greg Perkins
kiwilad
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Re: prop advise needed

Postby kiwilad » Wed Jun 24, 2009 9:25 am

Morph
I think its very similar here,its just the first permit to fly that is a bit dramatic,and being new to all this makes it worse.I've gotten it registered ZK_KIG ,the club IA has to do an anual inspection,placards have to be attached to damn near everthing,3 seperate logbooks have to be raised,engine,prop and airframe.Then CAA do a full visual inspection ( of a trike that has already flown 550 hrs) then it has to be test flown for them.All going well, after that I get a dual flight with my instructer and I'm off into the wild blue yonder ( within 10 mls of the airport anyway) :)

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