Dave Greer Posted May 14, 2021 Share Posted May 14, 2021 Trying to track the plan number as name searching archives not succeeded, thanks ? Black Arrow article August 1976 Kind regards Dave Quote Link to comment Share on other sites More sharing options...
Martin Harris - Moderator Posted May 14, 2021 Share Posted May 14, 2021 There was a Black Arrow listed by X-list - RC1290 I believe Sarik acquired the database (I may well be wrong so if anyone knows differently feel free to advise) but they don't seem to list it - it might be worth an enquiry? Quote Link to comment Share on other sites More sharing options...
Dave Greer Posted May 14, 2021 Author Share Posted May 14, 2021 Thanks Martin ? Quote Link to comment Share on other sites More sharing options...
Wookman Posted May 16, 2021 Share Posted May 16, 2021 Please do keep us posted on progress on this. I always liked the the look of this one. I would definitely be up for getting hold of the drawing for it. Quote Link to comment Share on other sites More sharing options...
kc Posted May 16, 2021 Share Posted May 16, 2021 (edited) All RCME and RM plans including X list plans should be in the Sarik Hobbies plan service. However some were scrapped before X list acquired them, some that were less popular or damaged. ( info from the man who acquired them, saving them from being put in the skip, and called them X list), Black Arrow was not listed in the 1983/4 Plans Handbook so maybe didnt survive. However the plan in the magazine looks easy enough to scale up from the magazine plan using a ruler and calculator just as people did before scanners and printers became available. Basically one takes the stated wingspan and divides it by the measured wingspan using a calculator. The figure is kept in the calculator as a constant and then every other measurement you take is multiplied by this constant. Millimetres are easiest. Then all measurements are taken from any convenient straight line to create your own drawing. Only basic lines are needed not all the construction detail. Give it a try if you really want to build this design! Edited May 16, 2021 by kc Quote Link to comment Share on other sites More sharing options...
kc Posted May 16, 2021 Share Posted May 16, 2021 You could buy a copy of RCME and get a better copy to start from which might enlarge on a copier. A set of all the 1976 copies is for sale here ( about the same as a plan now! ) Quote Link to comment Share on other sites More sharing options...
Wookman Posted May 16, 2021 Share Posted May 16, 2021 Emailed Sarik and had a very prompt responce saying that unfortunately Black arrow can not be supplied. Get your ruler and calculator out. Quote Link to comment Share on other sites More sharing options...
Stuphedd Posted May 17, 2021 Share Posted May 17, 2021 In my day the Black Arrow was a Rocket ! look it up on utube and see what tech we threw away and now trying to re-invent !! Quote Link to comment Share on other sites More sharing options...
Dave Greer Posted May 18, 2021 Author Share Posted May 18, 2021 On 16/05/2021 at 16:46, kc said: You could buy a copy of RCME and get a better copy to start from which might enlarge on a copier. A set of all the 1976 copies is for sale here ( about the same as a plan now! ) Hi - I have actually ordered the ebay mag (seemed last one) but 6 months or nix at all is the norm here on the southern tip of Africa. ? My target was a quick build for a slope fly away September 21, thus trying to get ahead of the post game. ? Cheers Dave Quote Link to comment Share on other sites More sharing options...
Dave Greer Posted May 18, 2021 Author Share Posted May 18, 2021 On 17/05/2021 at 12:12, Stuphedd said: In my day the Black Arrow was a Rocket ! look it up on utube and see what tech we threw away and now trying to re-invent !! Ah nothing like this for incentive, thanks ? Cheers Dave Quote Link to comment Share on other sites More sharing options...
kc Posted May 18, 2021 Share Posted May 18, 2021 Dave, I didn't realise you were that far away. I thought the ebay magazines would reach you in a few days. However I have finally found my copy of the magazine and will email a scanned copy of the tiny 1/5th scale plan if it's any help to you ( too late if you have spent the money! But it's not lost money as you can still read the magazines and then resell them! Old RCME still seem very worthwhile reading) I have scanned the plan at 600dpi to a PDF and it looks as though it might print at full size (500percent) and be useable. So if you want it send me a Private Message with your email address. Quote Link to comment Share on other sites More sharing options...
kc Posted May 19, 2021 Share Posted May 19, 2021 Whilst checking that the plan in the magazine is really 1/5th full size I realised that the method of scaling up by measuring wing and comparing to stated span works well but only if you actually measure the span. This plan with swept back wing caught me out as only 1 wing half is shown so you cannot measure wing tip to wingtip. If you just measure along the wing half it won't work out - you need to measure from extreme wingtip to a point along fuselage centre line AT RIGHT ANGLES and double it. The centre line is not shown at the point so you have to extend it. Anyway I have done it for you and if all the measurements of the magazine plan are multiplied by 5 it should produce a 53 inch span model. Quote Link to comment Share on other sites More sharing options...
Dave Greer Posted June 3, 2021 Author Share Posted June 3, 2021 On 19/05/2021 at 14:49, kc said: Whilst checking that the plan in the magazine is really 1/5th full size I realised that the method of scaling up by measuring wing and comparing to stated span works well but only if you actually measure the span. This plan with swept back wing caught me out as only 1 wing half is shown so you cannot measure wing tip to wingtip. If you just measure along the wing half it won't work out - you need to measure from extreme wingtip to a point along fuselage centre line AT RIGHT ANGLES and double it. The centre line is not shown at the point so you have to extend it. Anyway I have done it for you and if all the measurements of the magazine plan are multiplied by 5 it should produce a 53 inch span model. Thanks muchly, I have pm'd you ? Cheers Dave Quote Link to comment Share on other sites More sharing options...
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