Colin Anderson
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Everything posted by Colin Anderson
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I meant to say, many thanks Denis. 👍
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Many thanks, Dave. I followed the link and sent them a message.
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Couldn't find one, Dave. Do you have a link?
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Sorry Dave, managed to miss your comment! I'll check that lead out. Thanks.
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Well just engines "might" be able to help, but it would require me to send the throttle assembly to them - with our wonderful postal service? Er no. 9 times out of 10, it'll be fine, but that one time..... Contacted Ripmax to see if the pro 21 throttle stop screw assembly might fit the bill - they didn't know and haven't had them in stock since 2013! Still on their web site though! Okay, off to Apex fastners (Slough) to see if they might have M4 fine bolts of any kind - Nope. Now I'm back to square one. I know for sure that the thread is definitely M4 fine, but finding some in this country is proving difficult. I did find one place, but come on, £6.70 for one!
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Yeah I noticed that, Denis and that comes in course and fine too. This is an education. If just engines can't help, I'll get onto apex fasteners in Slough.
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That's what I like about this hobby, I'm always learning something! Up until now I thought M4 was just M4! I never realised that there was an M4 fine. There's an easy way for me to find out. There's a little place on the Slough trading estate that seems to have almost any bolt you could think of - it's an Aladdin's cave of bolts and fasteners; at least it is to me. I'll go there tomorrow and see if they've got any; if they have and it fits, you might just have solved this! Cheers Dave. I'll also be checking with just engines, on the of chance that they have the actual part.
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Okay, following suggestions I tried an M3 bolt in the hole - way too small, so an M2 will won't work either. Size appears to be very close to M4, but this will not screw in and I'm not inclined to either force it or tap it out - Sod's law says that I'll find exactly the right part once I've done so! What is interesting is that, if I unscrew the needle valve and screw that into the hole it screws in perfectly. Examining the threaded shank of the needle it's the same size as an M4, but to my eye has a slightly finer thread. If I can find out what this thread is I'll be a lot closer to making up something that'll work
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Definitely more modern than mine, Mike and slightly bigger capacity, going by the 28 on the crankcase; but thanks for posting.
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Yes, it is a car engine, but I'm given to understand that it's fine as an aero engine too. It does have a slightly bigger head - for more efficient cooling in a car, I presume - it also has a pulley on the front. I have both this and a 20; however, the 21 is in as new condition (apart from the missing throttle screw) so I'd prefer to use that, as I believe the capacity is very slightly bigger. Once I've sorted out the screw I'll run them both on the bench to assess them before making a final decision.
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Thanks. Got to get the throttle operational first, then I'll see if and how it runs with whatever it currently has fitted.
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Thanks Richard. That is indeed encouraging news.
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Many thanks, Richard and Denis. Both answers are of great help. 👍😊
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Here's the images of the 21 that weren't showing.
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Richard. I've managed to put the images up.
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Thanks Denis. Here are the images of the Thunder a Tiger in question .
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Thanks mate. I'll give them a try. 👍
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Thanks, Richard. I aquired both a 20 and a 21. As the the 21 appears to be in much better condition - at least outwardly - I'd planned on using it in a 48" Tiger Moth I'm building. I hadn't realised that it's ported differently; does this mean then that it incapable of running at lower revs? The motor is definitely a 21 and has a larger head - presumably to aid cooling. By any chance would you know the prop range for the 20. Strange that the images don't show.
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I bought this recently at Wings 'N' Wheels. Unfortunately I didn't notice at the time but the bolt and, presumably the spring that retain the throttle barrel were missing. Does anyone know where I might aquire one or, failing that, what the bolt size and thread are? I'm aware that the end of the bolt would have a reduced diameter to engage in the throttle barrel's slot. I've tried contacting the manufacturer, but they can't help without a part number; I asked RipMax also, as they show something similar on their website. In addition, what would the prop size be? And yes, I realise that this has a car head fitted, but I'm assured it will be fine in a plane. I also have a Thunder Tiger 20 and I presume this would use roughly the same prop range?
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I bought this recently at Wings 'N' Wheels. Unfortunately I didn't notice at the time but the bolt and, presumably the spring that retain the throttle barrel were missing. Does anyone know where I might aquire one or, failing that, what the bolt size and thread are? I'm aware that the end of the bolt would have a reduced diameter to engage in the throttle barrel's slot. I've tried contacting the manufacturer, but they can't help without a part number; I asked RipMax also, as they show something similar on their website. In addition, what would the prop size be? And yes, I realise that this has a car head fitted, but I'm assured it will be fine in a plane. I also have a Thunder Tiger 20 and I presume this would use roughly the same prop range?
