John Lucas 4 Posted December 12, 2014 Share Posted December 12, 2014 How much flying time with a 12oz if reasonable I will put tank where you have put yours Quote Link to comment Share on other sites More sharing options...
Jon H Posted December 12, 2014 Share Posted December 12, 2014 a 12oz tank will run my laser 155 for 8.5mins (on my tranny timer), I then do another pass or whatever and land. by the time im on the ground its easy 10 mins and there is a reserve for a go around or two if I need it. The saito uses more fuel than a laser would but still, im sure 10 mins would be doable on 12oz as you wont need to be flat out all the time. especially if you use something like a 16x6 as you will get good thrust from that Quote Link to comment Share on other sites More sharing options...
Jon H Posted December 12, 2014 Share Posted December 12, 2014 I use 5% nitro fuel. Higher nitro means higher fuel consumption so watch out for that Quote Link to comment Share on other sites More sharing options...
John Lucas 4 Posted December 12, 2014 Share Posted December 12, 2014 Jon thanks for the info. I will give it a go. Quote Link to comment Share on other sites More sharing options...
cymaz Posted December 12, 2014 Author Share Posted December 12, 2014 I have one of these tanks. They have been discontinued but you may find one somewhere. These tanks are shorter and higher than the Flair one. Hangar9 Quote Link to comment Share on other sites More sharing options...
Martin McIntosh Posted December 13, 2014 Share Posted December 13, 2014 Go back to page 39 and have a look at my tank system. Total capacity 15oz and has now been well flight tested, including prolonged inverted. Probably only the contents of the upper 9oz tank actually used. Quote Link to comment Share on other sites More sharing options...
Jon H Posted December 13, 2014 Share Posted December 13, 2014 I would not recommend using two tanks on top of eachother as the fuel head will change massively and could cause the engine to run lean and overheat when more than about 2/3 of the total capacity has been used Quote Link to comment Share on other sites More sharing options...
John Lucas 4 Posted December 15, 2014 Share Posted December 15, 2014 At last I have sorted the tank problem. I removed F1 and chain drilled F2 with my Dremel., made a nice square hole and now can now use a 12 or 14oz tank. Tidied up the tank hole replaced F1, glued in some triangular fillet around the joints of F1& F2 and now back in business. Just goes to show that sometimes putting together ARTF you forget how to solve problems which seem simple in the end. DB Sopwith Pup next. Thanks to those who responded to my original email Quote Link to comment Share on other sites More sharing options...
cymaz Posted December 15, 2014 Author Share Posted December 15, 2014 Posted by John Lucas 4 on 15/12/2014 19:24:00: At last I have sorted the tank problem. I removed F1 and chain drilled F2 with my Dremel., made a nice square hole and now can now use a 12 or 14oz tank. Tidied up the tank hole replaced F1, glued in some triangular fillet around the joints of F1& F2 and now back in business. Just goes to show that sometimes putting together ARTF you forget how to solve problems which seem simple in the end. DB Sopwith Pup next. Thanks to those who responded to my original email Any photos? Quote Link to comment Share on other sites More sharing options...
John Lucas 4 Posted December 15, 2014 Share Posted December 15, 2014 I will put some photo's on. Got a couple of dashboards coming from Dylan of Lazercraft. Regarding the undercarriage I will go with the one in the kit. Not much to do to complete the model now, join the wings sheet the bottom some sanding cover then look forward for better weather. Quote Link to comment Share on other sites More sharing options...
Martin McIntosh Posted December 15, 2014 Share Posted December 15, 2014 John, I am puzzled. Surely the cabane and u/c piano wire structures are in the way on the standard Precedent kit build? These prevented me from just relieving the former and moving the tank back. A pic would be interesting. Quote Link to comment Share on other sites More sharing options...
John Lucas 4 Posted December 15, 2014 Share Posted December 15, 2014 Gents here are some photo's of the new tank opening, The photo show's an hatch which was going to be used to install the tank but forgot about the cross bracing doh. Quote Link to comment Share on other sites More sharing options...
Martin McIntosh Posted December 15, 2014 Share Posted December 15, 2014 Never mind! The u/c should have been fitted at the beginning of the build anyway. A way round this would be to bend up a new one fixed to a ply plate on the bottom of the fus. At least you have solved your tank problem. Quote Link to comment Share on other sites More sharing options...
Stearmanandy Posted December 17, 2014 Share Posted December 17, 2014 Hi guys, good News! My fuselage is ready to cover! Finished those stupid wing firings and started my beloved Job Edited By Stearmanandy on 17/12/2014 19:00:44 Quote Link to comment Share on other sites More sharing options...
cymaz Posted December 17, 2014 Author Share Posted December 17, 2014 Stearmanandy Quote Link to comment Share on other sites More sharing options...
Nick Santovito Posted December 19, 2014 Share Posted December 19, 2014 Posted by Stearmanandy on 17/12/2014 18:59:25: good News! My fuselage is ready to cover! Finished those stupid wing firings and started my beloved Job Looks good! especially those Instrument panels. Have you run your engine yet? I've been wondering if the bigger engines (like my ASP 180) run hotter than the smaller ones. I've run a gallon and a quarter of 10% fuel (18% castor/syn mix) and it's just starting to loosen up to where I can hand start. but when it's running about 500 below peak with moderate blue smoke it measures about 250 F at the side of the rocker box. It doesn't smell hot or act like it's hot , but my .91 measured 190 F in the summer when running in. soooo.... Nick Quote Link to comment Share on other sites More sharing options...
Jon H Posted December 19, 2014 Share Posted December 19, 2014 Larger engines do run hotter but I have no idea how hot as I never bother measuring it. I would guess its somewhere about 125'c on the head but im not sure. Its funny you say its taken over a gallon before it will hand start. If my Lasers don't hand start first flick from new I am very disappointed, and the run in procedure is only 3 minutes long so no wasted time on the ground :D Quote Link to comment Share on other sites More sharing options...
Nick Santovito Posted December 20, 2014 Share Posted December 20, 2014 I'd love a Laser 150 in my Stampe's nose but the price to me would be $450 compared to the ASP's $250. So I'll burn $20 in fuel running it in and still have enough saved over to buy Super Coverite for the whole ship. Still, if someday I strike oil in the back yard, you can bet I'll be building a 1/4 scale Bleriot for that Laser V 160! The ASP isn't a bad engine so far though, it just doesn't have the precise tolerances, so it's tight for a while. The Magnum 91(same company as ASP) I have in my Smith miniplane is strong and reliable. (it only needed 45 min. of run in) So I'm hoping the 180 will be the same. Last few times I ran it, it started on the first backwards flip, after 6 chokes. and the compression is better too. Quote Link to comment Share on other sites More sharing options...
cymaz Posted December 20, 2014 Author Share Posted December 20, 2014 I don't want to tease you Nick but I'm thinking of selling my Laser 150. It needs a service and possibly new bearings but if you are still interested in the new year send me a post. I'm gradually moving to petrol on my bigger models. It's all a question of money, as always, if I get a work bonus then I will get another petrol and sell the laser. Interested? Quote Link to comment Share on other sites More sharing options...
Nick Santovito Posted December 20, 2014 Share Posted December 20, 2014 I think I am. I don't have anything in queue that would use it presently, but you never know what's coming. This time last year, I had no idea I'd be building another Precedent Stampe. Then around May I came across this thread and was wishing a lot. Lo and behold! by July I had a kit and now I'm about half way thru. Ain't life amazing? So Drop me a post if it happens. Who could pass up a Laser if he's not destitute? What's the prop range on it? (see! even if it doesn't happen, I'm already thinking about ships for it .. PS, I love the way the closing parenthesis comes out on this forum. Edited By Nick Santovito on 20/12/2014 16:39:28 Quote Link to comment Share on other sites More sharing options...
Nick Santovito Posted December 23, 2014 Share Posted December 23, 2014 addendum; Just saw the prop range. Hard to believe it can swing an 18/6 prop. I have an electric Sig 1/4 scale clipped cub with an 18/6 on it might be a good way to go nitro. bet it would sound real good on a low flyby. Quote Link to comment Share on other sites More sharing options...
Jon H Posted December 23, 2014 Share Posted December 23, 2014 Depending on the age of the engine and the prop/fuel being used a laser 150 should take an 18x6 to about 7000-7400 rpm Quote Link to comment Share on other sites More sharing options...
bert baker Posted December 23, 2014 Share Posted December 23, 2014 I am p/sure I used to run 16x8 on my Laser 150's in the Stampes, If I remember correctly the 18x6 props gave a slow rev pick up. and the smaller prop meant more fun with instant power. Quote Link to comment Share on other sites More sharing options...
Nick Santovito Posted December 24, 2014 Share Posted December 24, 2014 Posted by Jon Harper on 23/12/2014 08:38:35: Depending on the age of the engine and the prop/fuel being used a laser 150 should take an 18x6 to about 7000-7400 rpm Sounds about right, you Laser fans should get a kick out of this... I think the 180 is turning that size prop around 8k on 10% nitro, so the Laser is close if not equal.That's probably about as good as it will get since I'll run her peak less 500 - 800 since it's fully cowled. I'll probably run it at 1/2 to 2/3 for most operations (if I ever get it finished) Meanwhile we've got heavy rain and tornado warnings tonight and tomorrow. Cheers PS Bert, I prefer a slow rev-up, keeps me out of trouble on the touch and goes. Quote Link to comment Share on other sites More sharing options...
Nick Santovito Posted December 24, 2014 Share Posted December 24, 2014 Got the top left panel framed and ready to sheet. Sorry, I just have to wait on the spar webbing til after sheeting, so I can double glue the ribs to the sheet. One more panel, then the center section and I can finally do my favorite part of the airframe... Quote Link to comment Share on other sites More sharing options...
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