Ron Gray Posted September 18, 2023 Share Posted September 18, 2023 I would suggest, if you haven't done so already, fitting a short length of fuel tube to the vent pipe inside the tank so that it nearly touches the top of the inside of the tank. If you don't do that you will have difficulty filling the tank (it will only fill to the level of the vent pipe inside the tank) but make sure that it's not squashed against the tank too which could cut off air supply! 1 Quote Link to comment Share on other sites More sharing options...
toto Posted September 18, 2023 Author Share Posted September 18, 2023 No worries Ron, I'll look at that. We are probably talking a very small length, maybe an inch or so. Hopefully holding it up to the light will be able to prove that it is not obstructing the air flow. Cheers Toto Quote Link to comment Share on other sites More sharing options...
Rich Griff Posted September 18, 2023 Share Posted September 18, 2023 As Ron says... On the slec coloured top tank, the two upper pipe stubs, one to exhaust, the other to a "filling point" fitted to cheek plate ( a finishing trim to make nose pretty ) with a blanking cap for easy filling via porridge powered pump. To drain tank easily, invert fuz etc... Foam gasket between bulkhead and tank, stops exhaust goo etc. and protects the tank. Plain washers to spread load..... Quote Link to comment Share on other sites More sharing options...
Ron Gray Posted September 18, 2023 Share Posted September 18, 2023 Defo need something between tank and bulkhead as those nyloc nuts look like they will wear holes in the tank! Quote Link to comment Share on other sites More sharing options...
EarlyBird Posted September 18, 2023 Share Posted September 18, 2023 Something tells me that something is wrong with the feed pipe inside the tank. 🤔 Steve Quote Link to comment Share on other sites More sharing options...
toto Posted September 18, 2023 Author Share Posted September 18, 2023 (edited) If there are any issues ..... shout out ....... do you need more reference pictures ..... what of .....let me know as I'm trying to get this element over the hill. with regards to the tank Ron, I could possibly pull the tank a few mm back towards the rear ? cheers gents toto Edited September 18, 2023 by toto Quote Link to comment Share on other sites More sharing options...
Ron Gray Posted September 18, 2023 Share Posted September 18, 2023 5 minutes ago, toto said: I could possibly pull the tank a few mm back towards the rear Do that so you can put some form of spacer between it and the nuts, you need to make sure that they do not touch the tank as they will wear holes in it! 27 minutes ago, EarlyBird said: Something tells me that something is wrong with the feed pipe inside the tank It's a 2 line system so there is a clunk line and a vent line, apart from extending the vent to the top of the tank the clunk line looks OK, but maybe I can't see what you're seeing EB? Quote Link to comment Share on other sites More sharing options...
toto Posted September 18, 2023 Author Share Posted September 18, 2023 I still have to extend the vent pipe as suggested earlier. I'll do that to night. I also have to fix a bit of timber in to fix the RX to as well. Another job for tonight. Anything else with the fuel tank or fuel lines ...... shout out please. Cheers Toto Quote Link to comment Share on other sites More sharing options...
Ace Posted September 18, 2023 Share Posted September 18, 2023 Re the vent tube - to prevent possible suction to the top cut a small V in the end. Quote Link to comment Share on other sites More sharing options...
toto Posted September 18, 2023 Author Share Posted September 18, 2023 Hi Ace, I need to add a bit fuel tube to the vent so will cut a V when I am doing that. Cheers Toto Quote Link to comment Share on other sites More sharing options...
EarlyBird Posted September 18, 2023 Share Posted September 18, 2023 My thinking is that the function of the clunk is to always find the lowest place in the tank and it is the flexibility of the tube that enables it to do that. For example when in an inadvertent spin the nose points down and the clunk should fall to the bung end of the tank. Steve Quote Link to comment Share on other sites More sharing options...
toto Posted September 18, 2023 Author Share Posted September 18, 2023 Does that not mean that the fuel feed tube would be doubling back on itself possibly causing a blockage ? Quote Link to comment Share on other sites More sharing options...
EarlyBird Posted September 18, 2023 Share Posted September 18, 2023 On 10/07/2023 at 11:43, Nigel R said: Two strokes mounted upright, in this fashion, with the tank centre aligned with the centre of the mount (i.e. so the neck can easily poke through the firewall), usually mean the tank top is approx level with the needle valve. This has caused no problems for me. Upright and exposed also gives good access which is useful in a trainer. As for exhaust gunk, a few inches of silicon tube can direct the mess away from the airframe? Note OS instructions for FP series engine explicitly ask for the needle to be aligned only just below the tank top. Is the tank at the correct level, Top of tank middle of carb is correct, I have read that loads of times on here. Steve Quote Link to comment Share on other sites More sharing options...
EarlyBird Posted September 18, 2023 Share Posted September 18, 2023 1 minute ago, toto said: Does that not mean that the fuel feed tube would be doubling back on itself possibly causing a blockage ? Better than the clunk being held out of the fuel. Quote Link to comment Share on other sites More sharing options...
toto Posted September 18, 2023 Author Share Posted September 18, 2023 Hi Early Bird ..... catching me mid post here .......😄 I'll come back with pictures attempting to demonstrate the tank and carb levels shortly. Meanwhile ..... as the fuel tank installation issue rages on ......😆 I had to do some covering repairs to the wing band support area ...... so whilst I have uploaded the photo's ... here they are before returning to the great fuel debate ......😆 This is an area that I discovered the covering was badly separating from the wing and it looked like fuel had been penetrating. and So0 as you can see, I cut out the offending area, cleaned it up a bit, let it dry out and then slightly sanded it to give a bit of a key for the new covering. out with the covering and cut roughly to size. marked out areas to slit in order to work round the servo's. and started to apply the iron to heat the covering into place. Its not perfect but miles better than it was .... next was to re-fit these wing band supports .... these had failed spectacularly on the initial fit. they had started walking their way up the wing I think due to the pressure being exerted on them by the wing bands. That was not going to happen this time ...... I decided to use epoxy instead of CA this time ..... and dowel them for good measure ..... I cut away an area of the new covering in order to give the epoxy a wood to wood key ... and dowel them in place. the aesthetics don't bother me at all ...... functional comes first. A bit of a sand and filler / paint will cover it up. Now ....... back to the fuel tank ..... back soon. toto 1 Quote Link to comment Share on other sites More sharing options...
Rich Griff Posted September 18, 2023 Share Posted September 18, 2023 Good points equally valid, so perhaps a shorter brass pipe etc.....some "fiddle factor's to play with/muse over/test..... As stated I use the slec tanks with the coloured tops. Since discovering the "kinked pipe" problem in the tank buried in the shadows nose, and using the brass pipe trick, I have not had that issue since, mind you I suppose I have been lucky, the only spins the shadow has experienced are the ones I have initiated, being quite flat and increasing in speed the more I allow it to do, NEVER spinning more than 12 times, thus avoiding that dreaded next number... Fuel filters come in clunk varieties as well. 1 Quote Link to comment Share on other sites More sharing options...
toto Posted September 18, 2023 Author Share Posted September 18, 2023 (edited) OK ..... fuel tank ..... A couple of things in this post ....... extension to the vent pipe ..... V cut in the end ..... Installed into the tank and the vent does reach the top and possibly touches ..... is that an issue ..... next .... forgive the photo's as I was trying to hold a ruler parallel with the top of the fuel tank to show where it comes up to on the carb. I can try and get some slightly better pictures as these would suggest the tank is higher but its just the poor pictures .... I'll try get some better versions. toto Edited September 18, 2023 by toto Quote Link to comment Share on other sites More sharing options...
Rich Griff Posted September 18, 2023 Share Posted September 18, 2023 Don't forget the plain washers and exhaust stub repositioning.....locknut..... Largish diameter silicon hose is available....a local computer shop doing liquid cooling..... Quote Link to comment Share on other sites More sharing options...
Rich Griff Posted September 18, 2023 Share Posted September 18, 2023 Beer and crisps ! 1 Quote Link to comment Share on other sites More sharing options...
toto Posted September 18, 2023 Author Share Posted September 18, 2023 Sounds good ..... another couple of badly taken photo's might not do much good but here they are anyway. The third with the pencil point is trying to show the level whilst eyeing it along the line where the top of the tank sits. Maybe a bit more help. Another .... and the pencil showing where I think the top of the tank is in line with .... not the most accurate way but gives a reasonable indication..... cheers toto Quote Link to comment Share on other sites More sharing options...
MattyB Posted September 18, 2023 Share Posted September 18, 2023 5 hours ago, toto said: We are on a bit of a roll. Looks like I have managed to programme dual rates ok. or in my case ..... triple rates ... 70% low ... 80% medium and 100% high. the low rate may change as I am sure we had it running on 60% at one point ..... it can be played around with. Getting the hang of this TX a bit better now. toto Just go into the old model memory and note down the rates you had implemented, as your mentor will probably have fine tuned them after the maiden. TLAR is ok to a point, but if he set it up to his taste before, best to get as close as you can to that with the new model memory. Quote Link to comment Share on other sites More sharing options...
toto Posted September 18, 2023 Author Share Posted September 18, 2023 Next task is the RX platform. I'm thinking installing a platform between the middle and lower plywood deck formers. and then the servo will be mounted in the orientation shown but slightly higher. this gives access to remove the servo leads as necessary and still access the bind button. it will be on velcro anyway but I think its the best position, towards the floor of the fuselage giving best chance of a receiption from below. back later ..... toto Quote Link to comment Share on other sites More sharing options...
toto Posted September 18, 2023 Author Share Posted September 18, 2023 No worries Matty, The model my instructor set up I have saved. I created a new model for my Frankinstar version.😄 toto Quote Link to comment Share on other sites More sharing options...
toto Posted September 18, 2023 Author Share Posted September 18, 2023 (edited) OK .... nothing fancy ..... A bit thin ply .... a bit Velcro .... and on we go ..... I screwed the ply on with a couple of small self tapping wood screws so that if necessary .... the ply holding plate could be taken back off if it does not work out. Thats me for the moment.... toto Edited September 18, 2023 by toto 1 Quote Link to comment Share on other sites More sharing options...
aidan mcatamney Posted September 18, 2023 Share Posted September 18, 2023 1 hour ago, toto said: Hi Early Bird ..... catching me mid post here .......😄 I'll come back with pictures attempting to demonstrate the tank and carb levels shortly. Meanwhile ..... as the fuel tank installation issue rages on ......😆 I had to do some covering repairs to the wing band support area ...... so whilst I have uploaded the photo's ... here they are before returning to the great fuel debate ......😆 This is an area that I discovered the covering was badly separating from the wing and it looked like fuel had been penetrating. and So0 as you can see, I cut out the offending area, cleaned it up a bit, let it dry out and then slightly sanded it to give a bit of a key for the new covering. out with the covering and cut roughly to size. marked out areas to slit in order to work round the servo's. and started to apply the iron to heat the covering into place. Its not perfect but miles better than it was .... next was to re-fit these wing band supports .... these had failed spectacularly on the initial fit. they had started walking their way up the wing I think due to the pressure being exerted on them by the wing bands. That was not going to happen this time ...... I decided to use epoxy instead of CA this time ..... and dowel them for good measure ..... I cut away an area of the new covering in order to give the epoxy a wood to wood key ... and dowel them in place. the aesthetics don't bother me at all ...... functional comes first. A bit of a sand and filler / paint will cover it up. Now ....... back to the fuel tank ..... back soon. toto Excellent job Toto with the repair and covering. Quote Link to comment Share on other sites More sharing options...
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