Search found 68 matches

by JimCrawford
Wed Mar 04, 2020 11:24 am
Forum: ENGINEERING AND MAINTENANCE
Topic: Rollason Ardem maintenance manual
Replies: 2
Views: 314

Re: Rollason Ardem maintenance manual

I may have the manual you require in pdf format - I'll search it out.

Jim
by JimCrawford
Wed Mar 04, 2020 11:23 am
Forum: ENGINEERING AND MAINTENANCE
Topic: Wheel Hub dimensions
Replies: 0
Views: 574

Wheel Hub dimensions

I've been making up some wheel hubs to be able to change my Nipper from the 3 1/2 x 4.95 tyres (made from unobtainium) to easily obtained and much, much cheaper 4.00 x 4 (even from Tost!). However I've come across an interesting issue regarding the hub sizes which I hope the forum may be able to sol...
by JimCrawford
Mon Sep 23, 2019 1:10 pm
Forum: WANTED
Topic: Wingbolts
Replies: 7
Views: 2667

Re: Wingbolts

go to;

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

who are the Nipper operating arm of Airweld.

Jim
by JimCrawford
Thu Sep 19, 2019 7:06 pm
Forum: WANTED
Topic: Wingbolts
Replies: 7
Views: 2667

Re: Wingbolts

Hi Bert, Are you trying to comply with the LAA mandatory LAA/MOD/025/003, 01 May 2014? http://www.lightaircraftassociation.co.uk/engineering/Airworthiness/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...
by JimCrawford
Sat Sep 14, 2019 1:55 pm
Forum: ENGINEERING AND MAINTENANCE
Topic: Nipper composite fuel tank
Replies: 10
Views: 1768

Re: Nipper composite fuel tank

Hi Neil, I've been working on a scheme for a composite tank, also with a triangular drop to increase the capacity and to provide a sump to the otherwise flat bottom. I hadn't thought of the possibilities of a flop tube but it seems a good idea even though my VW isn't adapted for inverted flight. Bui...
by JimCrawford
Wed Aug 21, 2019 10:28 pm
Forum: ENGINEERING AND MAINTENANCE
Topic: Nipper composite fuel tank
Replies: 10
Views: 1768

Re: Nipper composite fuel tank

Hi Neil, My concern with repairing the existing tank by doing as you suggest, de-riveting the seam and using Proseal to re-assemble it, is that the original tank would have been made before ethanol in fuel was even thought of as a good idea. In an era of Avgas and no ethanol mogas there was unlikely...
by JimCrawford
Sat Aug 17, 2019 3:36 pm
Forum: ENGINEERING AND MAINTENANCE
Topic: Replacing undercarriage suspension bands
Replies: 12
Views: 1530

Re: Replacing undercarriage suspension bands

Hello Neil, I hope to be camping at the rally over Saturday night, assuming the beer festival is on again. Possibly Friday night as well. Don't bother with the tool if the bands can be fitted without it. I would have gone for the bungee mod but by good fortune managed to get hold of a ring set. Othe...
by JimCrawford
Thu Aug 15, 2019 11:31 am
Forum: ENGINEERING AND MAINTENANCE
Topic: Replacing undercarriage suspension bands
Replies: 12
Views: 1530

Re: Replacing undercarriage suspension bands

Hello Neil, Yes, I'm sad I'm not flying it but..... force majeure. If you have a tool for fitting the u/c suspension then I would be interested in borrowing it. Are you going to be at the rally? My suspension is the Neumann (sp?) bands not the bungee mod, I was lucky enough to get hold of a set and ...
by JimCrawford
Wed Aug 14, 2019 8:39 pm
Forum: ENGINEERING AND MAINTENANCE
Topic: Replacing undercarriage suspension bands
Replies: 12
Views: 1530

Re: Replacing undercarriage suspension bands

Hi Neil, No, not yet. The undercarriage structure is demounted to clear up a little surface corrosion and to repaint. Everything has slowed down drastically due to unforeseen domestic commitments. I'm also changing the hubs from the 4.95 x 3 1/2 style to 4.00 x 4 . The quote I got for 'old new stock...
by JimCrawford
Tue May 07, 2019 11:33 am
Forum: ENGINEERING AND MAINTENANCE
Topic: 2 stroke engine in a Nipper?
Replies: 2
Views: 962

Re: 2 stroke engine in a Nipper?

Check the 4 stroke Briggs and Stratton conversions used by hovercraft people (and crazies that race lawn mowers :shock: ) Complete with belt reduction gear you are looking at 40HP at about 2200 propeller rpm and a weight of ~ 100lbs. This won't be much less thrust than a 1600 VW at 3400 rpm, if at a...
by JimCrawford
Sat Apr 13, 2019 9:37 pm
Forum: ENGINEERING AND MAINTENANCE
Topic: Replacing undercarriage suspension bands
Replies: 12
Views: 1530

Replacing undercarriage suspension bands

Once again tapping into the Nipper site knowledge base! I have the aircraft up on trestles as it makes it more stable for trial fits of the engine as I replace the Peacock style mags with a Leburg electronic set up. Consequently the undercarriage legs are 'dangling' so I shall take the opportunity o...
by JimCrawford
Thu Apr 11, 2019 10:55 pm
Forum: ENGINEERING AND MAINTENANCE
Topic: Nipper composite fuel tank
Replies: 10
Views: 1768

Re: Nipper composite fuel tank

Hello ragson. That is a very interesting website, I'll certainly chase up some of their paint products. The specialist composite tank repair product isn't suitable for my purpose as it is essentially a sloshing sealant and I'm not happy with using sealants on a tank which has started to fail. I cann...
by JimCrawford
Thu Mar 14, 2019 5:54 pm
Forum: ENGINEERING AND MAINTENANCE
Topic: Nipper composite fuel tank
Replies: 10
Views: 1768

Nipper composite fuel tank

I've tried the LAA forum and even emailing LAA engineering with no response so I thought I try here. My fuel tank has developed a leak along a riveted seam. I've been searching for a composite system compatible with E5 mogas in order to lay up a fuel tank. The most likely candidate I've found so far...
by JimCrawford
Wed May 16, 2018 3:19 pm
Forum: ENGINEERING AND MAINTENANCE
Topic: Fuselage Fabric
Replies: 3
Views: 1740

Re: Fuselage Fabric

That's one of the advantages with Oratex - significant weight reduction and no post covering finishing required.

Jim
by JimCrawford
Wed May 16, 2018 10:16 am
Forum: ENGINEERING AND MAINTENANCE
Topic: Fuselage Fabric
Replies: 3
Views: 1740

Re: Fuselage Fabric

If I were considering recovering my Nipper I think Polyfiber would be the process of choice. It is well proven and the materials seem more pleasant to use than the Ceconite process. I've not used Polyfiber but I have done several Ceconite covers, the only problem I have is that I now have a stock of...

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