RICHARD WILLS Posted March 2, 2021 Author Share Posted March 2, 2021 Well done chaps . you've spotted the deliberate error . Kept you on your toes eh ? Now , more to the point , is it wish full thinking or has Alan secreted a Whirlwind in his hanger ? Quote Link to comment Share on other sites More sharing options...
Eric Robson Posted March 2, 2021 Share Posted March 2, 2021 I think Alan is a Westland fan as there is also a Lysander in the same picture. Quote Link to comment Share on other sites More sharing options...
Jonathan S Posted March 2, 2021 Share Posted March 2, 2021 Richards hint about using the compass cutter to cut out the wheel well worked so well. Shame I only found out after doing the first one. Quote Link to comment Share on other sites More sharing options...
alan p Posted March 2, 2021 Share Posted March 2, 2021 Hi Gordon thats a good solution? Regards the other queries:- Both fitted out require fuel proofing and CofG, followed by the nerve to fly them? 1 Quote Link to comment Share on other sites More sharing options...
alan p Posted March 2, 2021 Share Posted March 2, 2021 Forgot to add other Lysander already flown Nijhius Design, LX is a Hutson design petrol engined Quote Link to comment Share on other sites More sharing options...
Gordon McConnell Posted March 2, 2021 Share Posted March 2, 2021 Cool models Alan! You have been busy! Quote Link to comment Share on other sites More sharing options...
RICHARD WILLS Posted March 3, 2021 Author Share Posted March 3, 2021 Very nice Alan . I will give you a call sometime to discuss the "Crikey " it looks fab . Sorry for the diversion chaps . Quote Link to comment Share on other sites More sharing options...
Eric Robson Posted March 3, 2021 Share Posted March 3, 2021 Hi Alan, sorry to prolong the thread hijack , is LX the 70" Hutson Lizzie? it looks bigger than that and as is for a 40- 52 fs it must be a small petrol engine. It has been on my wish list for a long time. Quote Link to comment Share on other sites More sharing options...
alan p Posted March 3, 2021 Share Posted March 3, 2021 Eric Hutson 70" Evolution 10cc petrol engine (Unrun at the moment and Now discontinued ) Think we need to un hijack the thread now? Quote Link to comment Share on other sites More sharing options...
David Hazell 1 Posted March 3, 2021 Share Posted March 3, 2021 On 22/02/2021 at 06:49, Paul Johnson 4 said: David The NTM 4248 650kv with the Dynam 13x7.5x3 is a great match. On a 4 cell 3300mah you'll get 4 to 5 mins exciting flight times. The NTM 5050 580Kv on the standard FMS 4 blade 14x8x4 is an approximate equivalent. With about the same performance. The FMS Mustang uses a 540kv standard motor so the 580kv is a 'hot replacement. A little bit like replacing the Alison engine with the Merlin.? Gents, having received the NTM Propdrive v2 5050 580kv (2 of them) from HobbyKing, I was impressed by the heft of the unit, but noticed very quickly that the bolt on adapter has a different thread than the clamp on one. Both M8 width, but the bolt on has a narrower pitch thread and as such will not work with what I call "standard M8". Lo and behold, the beautiful alu spinnner shaft extension doesn't fit! Arrrggghhh! I have a query in with HK product support asking if they can explain exactly why on earth they chose to use a "non standard" M8 thread for the bolt on adapter, but not had a meaningful response from them yet. I was hoping to use this motor for the P51 when I get around to building it and am now a bit stumped as to what to do. I had planned to put my 4248 650kv in the spit, which itself isn't devoid of issues: The bolt on adapter is so short I need to use a counter sunk nut if I plan to use the deep hubbed dynam. This also eliminates the possibility of using the shaft extension from the other Alu spinner I received for the Spitfire! Thoroughly regretting not getting hold of FMS units right at the moment! Quote Link to comment Share on other sites More sharing options...
Trevor Posted March 4, 2021 Share Posted March 4, 2021 Spinner adapter nuts are a frequent issue. Usually the problem is the other way round - trying to fit a spinner aimed at i.c. Engines (which usually have imperial threads) onto a metric prop adapter. Once you know what thread you’ve got (sounds like it may be 5/16 unf ?) have a look on eBay. It’s come to my rescue several times. Quote Link to comment Share on other sites More sharing options...
David Hazell 1 Posted March 4, 2021 Share Posted March 4, 2021 17 minutes ago, Trevor said: Spinner adapter nuts are a frequent issue. Usually the problem is the other way round - trying to fit a spinner aimed at i.c. Engines (which usually have imperial threads) onto a metric prop adapter. Once you know what thread you’ve got (sounds like it may be 5/16 unf ?) have a look on eBay. It’s come to my rescue several times. Thanks Trevor. I've ordered a silverline thread identification tool off of amazon for 70p (plus £3.89 shipping!!) - hopefully I'll be able to identify the thread using that tool. Beggars belief as to why HobbyKing chose in their wisdom to provide a motor which has different threaded prop adapters for bolt on vs clamp on, but hey ho... Quote Link to comment Share on other sites More sharing options...
Paul Johnson 4 Posted March 4, 2021 Share Posted March 4, 2021 It's an M8x1 thread. Quote Link to comment Share on other sites More sharing options...
David Hazell 1 Posted March 4, 2021 Share Posted March 4, 2021 10 minutes ago, Paul Johnson 4 said: It's an M8x1 thread. Thanks Paul! I still have no clue why they would choose to mix and match adapter threads! Quote Link to comment Share on other sites More sharing options...
David Hazell 1 Posted March 4, 2021 Share Posted March 4, 2021 Oooh, searching for adapter: https://hobbyking.com/en_us/brass-nut-for-spinners-m8x1-m4-1pc.html Ordered this. I can't find an equivalent to what Richard provided with his spinners, unfortunately. Quote Link to comment Share on other sites More sharing options...
Paul Johnson 4 Posted March 4, 2021 Share Posted March 4, 2021 2 hours ago, David Hazell 1 said: Oooh, searching for adapter: https://hobbyking.com/en_us/brass-nut-for-spinners-m8x1-m4-1pc.html Ordered this. I can't find an equivalent to what Richard provided with his spinners, unfortunately. These were made for him specifically and based upon his original suggestion of using the predator. I must admit I had the same issue with the 5050 and had to make one specially for the plane I got it for. Have you noticed that our hobby is a series of 'problems' to overcome. 1 Quote Link to comment Share on other sites More sharing options...
Ron Gray Posted March 4, 2021 Share Posted March 4, 2021 (edited) Just engines do a large range of adapters for spinner attachment plus ones where there isn't enough shaft thread sticking out beyond the prop hub, common issue when using Dynam props. This is the one that I made to get over that problem (spinner is not shaft mounted). Edited March 4, 2021 by Ron Gray Forgot photos Quote Link to comment Share on other sites More sharing options...
David Hazell 1 Posted March 4, 2021 Share Posted March 4, 2021 1 hour ago, Ron Gray said: Just engines do a large range of adapters for spinner attachment plus ones where there isn't enough shaft thread sticking out beyond the prop hub, common issue when using Dynam props. This is the one that I made to get over that problem (spinner is not shaft mounted). Beautiful job there Ron. I think Richard posted something very similar to this a few pages back on this thread. I found these on eBay and ordered some which arrived from china - I ended up with 25 of them, but I may find another use for them. I don't know if I will have to do something to get them to balance or not: https://www.ebay.co.uk/itm/M4-M10-Square-Tee-Type-Carbon-Steel-Weld-Nuts-Machine-Screw-w-Projections/362632985898?ssPageName=STRK%3AMEBIDX%3AIT&var=631773939121&_trksid=p2060353.m2749.l2649 on the 4248, I do have the M3 female threaded centre on the bolt on adapter I can use to attach the spinner - don't know if it will be man enough though... Quote Link to comment Share on other sites More sharing options...
Ron Gray Posted March 4, 2021 Share Posted March 4, 2021 M3 will be fine, I have a few with that size and they haven't been a problem. 1 Quote Link to comment Share on other sites More sharing options...
Ron Sivers Posted March 5, 2021 Share Posted March 5, 2021 I know this may sound a silly question but what is the preferred cable route from the ESC (located behind motor) to the battery box? Quote Link to comment Share on other sites More sharing options...
Gordon McConnell Posted March 5, 2021 Share Posted March 5, 2021 I am working on completing the nose section and considering how to instal the sound system. I am planning to mount the transducer (speaker) on a 2mm depron sheet. This will be screwed or bonded onto the lower side members which attach the bottom skin on the forward fuselage, just after the cowling. I am wondering what diameter of hole to cut in the bottom skin to allow the sound to exit. Does it need to be the same diameter as the transducer or larger. Will it work if the hole is covered in some sort of material similar to hi-fi speaker? Any advice very welcome. Quote Link to comment Share on other sites More sharing options...
Paul Johnson 4 Posted March 5, 2021 Share Posted March 5, 2021 Gordon before you decide where to install the speaker check your C of G, I have not fitted mine yet as have been looking into other issues with a previous partially finished build. Eric mentioned that with the 4000mAh battery she is nose heavy I would visit this install towards the very end before committing to it. When i get the chance I will have a look. As I have put an open radiator in the mid section this might be the place for it but cannot confirm this yet. Obviously this is dependent on what battery you use to where you could/can fit it. If you look at how I left myself the option to remove the battery tray to access the lower nose for a retrofit it gives more options to any balance issues in putting unnecessary weight onboard. Quote Link to comment Share on other sites More sharing options...
Paul Johnson 4 Posted March 5, 2021 Share Posted March 5, 2021 4 hours ago, Ron Sivers said: I know this may sound a silly question but what is the preferred cable route from the ESC (located behind motor) to the battery box? Ron if you search back in the thread you'll find how I did this. Quote Link to comment Share on other sites More sharing options...
Gordon McConnell Posted March 5, 2021 Share Posted March 5, 2021 43 minutes ago, Paul Johnson 4 said: Gordon before you decide where to install the speaker check your C of G, I have not fitted mine yet as have been looking into other issues with a previous partially finished build. Eric mentioned that with the 4000mAh battery she is nose heavy I would visit this install towards the very end before committing to it. When i get the chance I will have a look. As I have put an open radiator in the mid section this might be the place for it but cannot confirm this yet. Obviously this is dependent on what battery you use to where you could/can fit it. If you look at how I left myself the option to remove the battery tray to access the lower nose for a retrofit it gives more options to any balance issues in putting unnecessary weight onboard. Paul, very sensible advice, thank you. The transducer is quite heavy (I must weigh it) and will certainly move the CG forward if I instal it in the front fuselage. I will follow your advice and make provision for the sound system in the front and rear fuselage as retro-fit possibilities. Better to keep the options open until I find the likely CG location! Quote Link to comment Share on other sites More sharing options...
Ron Sivers Posted March 5, 2021 Share Posted March 5, 2021 1 hour ago, Paul Johnson 4 said: Ron if you search back in the thread you'll find how I did this. yes thanks Paul, will try this Quote Link to comment Share on other sites More sharing options...
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