Wingbolts

Nipperskipper
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Wingbolts

Postby Nipperskipper » Mon Sep 16, 2019 1:59 pm

Hello Nipper lovers, I need badly a new set of wingbolts for my Tipsy Nipper OO-PVA !
Who can help me out with this request pls ? Rgds Bert Kuyper

Bumblebee Girl
Posts: 13

Re: Wingbolts

Postby Bumblebee Girl » Mon Sep 16, 2019 5:35 pm

Sorry I can't help, Bert, but I'll let you know if I hear of any.

Kind regards

Kate
G-AWJE

Bumblebee Girl
Posts: 13

Re: Wingbolts

Postby Bumblebee Girl » Mon Sep 16, 2019 6:25 pm

You could try Airweld; their details are on the Forum.

Kate

JimCrawford
Posts: 66

Re: Wingbolts

Postby JimCrawford » Thu Sep 19, 2019 7:06 pm

Hi Bert,
Are you trying to comply with the LAA mandatory LAA/MOD/025/003, 01 May 2014?

http://www.lightaircraftassociation.co. ... /AWA03.pdf

I am in the process of replacing the bolts on my Nipper with the stud design supplied by Airweld. They only had a limited stock a while ago but some may still be available and it would certainly be the easiest route to take. When the change over is complete I'll get the bolts checked (they have only done 50hrs so I will be surprised if they fail) and then I'll have a spare set.

Jim

Nipperskipper
Posts: 2
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Re: Wingbolts

Postby Nipperskipper » Mon Sep 23, 2019 10:44 am

JimCrawford wrote:Hi Bert,
Are you trying to comply with the LAA mandatory LAA/MOD/025/003, 01 May 2014?

http://www.lightaircraftassociation.co. ... /AWA03.pdf

I am in the process of replacing the bolts on my Nipper with the stud design supplied by Airweld. They only had a limited stock a while ago but some may still be available and it would certainly be the easiest route to take. When the change over is complete I'll get the bolts checked (they have only done 50hrs so I will be surprised if they fail) and then I'll have a spare set.

Jim


Thanks very much Jim !


Yes I am trying to comply with the LAA/MOD as my wing was removed after I had to make an emergency landing without my prop which disapeared in flight from a Jabiru engine. The bolts from crankcase and propeller were broken ! Its still under investigation what caused that separation. I will contact Airweld for new bolts, thank you for this help.
You know any adress from Airweld ? Rgds Bert

JimCrawford
Posts: 66

Re: Wingbolts

Postby JimCrawford » Mon Sep 23, 2019 1:10 pm

go to;

http://www.nipperaircraft.co.uk/index.htm

who are the Nipper operating arm of Airweld.

Jim

Neil Spooner
Posts: 522
Location: Ardleigh, Colchester, Essex, UK
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Re: Wingbolts

Postby Neil Spooner » Sat Nov 02, 2019 2:58 pm

'The bolts from crankcase and propeller were broken'.......do you mean from the crankshaft flange to the propellor? ie the bolts that hold the prop' onto the flange?
If so it's likely to be lack of bolt torque.....not many people check the torque of these bolts very often. It should be done seasonally, as the change in humidity alters the dimensions of the prop'....dry weather the wood shrinks, humid weather it expands.
Well done on your forced landing. Hope the engine didn't over-rev, if so a very good look inside the engine is a good idea.
Neil
A little help goes a long way.
Nipper G-BRPM and G-BALS
RV4 G-IKON

Nipperman
Posts: 1

Re: Wingbolts

Postby Nipperman » Thu Nov 07, 2019 10:45 am

Neil Spooner wrote:'The bolts from crankcase and propeller were broken'.......do you mean from the crankshaft flange to the propellor? ie the bolts that hold the prop' onto the flange?
If so it's likely to be lack of bolt torque.....not many people check the torque of these bolts very often. It should be done seasonally, as the change in humidity alters the dimensions of the prop'....dry weather the wood shrinks, humid weather it expands.
Well done on your forced landing. Hope the engine didn't over-rev, if so a very good look inside the engine is a good idea.
Neil



No Neil, it were the 6mm bolts from the flange to the crankshaft. I now know that in later versions off the Jabiru engine the bolts are now 8 mm's thick. Mine engine was a version 1 engine, in the meanwhile there is the version 4 engine on the market.
As the crankshaft was damaged bij the loose bolts, the engine got a total overhaul. Engine was not over revt btw !
But I am now still waiting for the new wingbolts from airweld to install ! In one of the old bolts with a crack near head was found !!
So the wingbolt check LAA/MOD/025/003 is very important.
Excuse for the late answer on your question.
Rgds Bert


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