Here in Oz I'm using hoop pine - an Australian native timber that's popular with boatbuilders. It's been used in aircraft since at least WW2. About 10% heavier than spruce but also 15% stronger. And about an order of magnitude cheaper since it's locally grown whereas spruce has to be imported. I'm also using hoop pine marine ply instead of birch or mahogany.
The higher strength of hoop pine might offer opportunities to use smaller sizes in the timber, but I'm not doing that. The weight penalty across the whole airframe is about 15 - 20 lbs, but since I'm planning a mtow that's nearly 50% higher than the original design (1320 lbs vs 900 lbs), I figure the extra strength in the timber might provide a margin in structural strength I wouldn't otherwise have. I'll look for weight savings elsewhere - e.g. tailwheel rather than nosewheel, 6 cylinder Jabiru engine (120 hp @ 178 lbs with exhaust and accessories), glass panel, etc. Cheers, Tony On 26 February 2017 at 00:22, Robert Russell via KRnet <krnet@list.krnet.org > wrote: > I could also put strings on it and play a song but I don't think it would > parked that long. ( unintentional rhyme ) Seriously, I have done some > reading and Yellow cedar is actually stronger then sitka with extremely > minor weight difference,maybe 1-2 lbs over the whole project. Hell, I can > lose that with a good morning visit to the bathroom ! > I am not sure what the reluctance is to look at options ( or if there is > one ) but even Wicks has offered up hemlock because they know spruce is > very expensive. > Also, scarfing is an acceptable method to make longer pieces and I will > going to the aviation museum we have here to find some mentoring on that > process. I think I can get get enough yellow cedar wood for two KRs for > around $450.00 Canadian, that's about $2.00 U.S. ...LOL > I am going to take some pictures of the pieces I am speaking about and > will put them up on Dropbox. I would be interested in any other comic > relief or serious input folks have as I really do value all opinions. > Happy Saturday everyone. > > > So, a guy walks into a bar........ > > > Bob > > > The up side is you could use the KR to store wool sweaters and > blankets when you're not flying. :-) > > Larry Flesner > > > _______________________________________________ > Search the KRnet Archives at https://www.mail-archive.com/ > krnet@list.krnet.org/. > Please see LIST RULES and KRnet info at http://www.krnet.org/info.html. > see http://list.krnet.org/mailman/listinfo/krnet_list.krnet.org to change > options. > To UNsubscribe from KRnet, send a message to krnet-le...@list.krnet.org > > _______________________________________________ > Search the KRnet Archives at https://www.mail-archive.com/ > krnet@list.krnet.org/. > Please see LIST RULES and KRnet info at http://www.krnet.org/info.html. > see http://list.krnet.org/mailman/listinfo/krnet_list.krnet.org to change > options. > To UNsubscribe from KRnet, send a message to krnet-le...@list.krnet.org > _______________________________________________ Search the KRnet Archives at https://www.mail-archive.com/krnet@list.krnet.org/. Please see LIST RULES and KRnet info at http://www.krnet.org/info.html. see http://list.krnet.org/mailman/listinfo/krnet_list.krnet.org to change options. To UNsubscribe from KRnet, send a message to krnet-le...@list.krnet.org
