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Building Tips and technical articles. => Building techniques => Topic started by: fred cesquim on September 17, 2020, 04:45:03 AM
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Here´s another model close to maiden flight day now, so it´s time to do a build log (backwards)
2 years ago sensing the lack of interest of Brazilians on building models and spending the whole day at whats app c/l groups talking about the past and losing connection with what our hobby is all about : building and flying.
So i started a challenge to build a specific model along a 6 month period.The model chosen was Bob Hunt´s Holeshot because is incredibly simple to cut and build, can be cheap as balsa consume is low, powered by 25/35 engines and in Brazil we have plenty CB 25 (local engine) laying around at almost every c/l flier workshop, FLIES GREAT, looks great and to top it all (indeed my first reason to choose) It´s a homage to Bob Hunt, a nice gentlemen, great designer, world class builder and flier and a full time supporter of control line worldwide. Bob´s modelling skills are my role model since i´ve started modelling in 1984 and saw his mag article on landing gear spats (flying models).
The challenge went well and some 15 modelers from the whole country participated ( rules are to show pictures of the building and a flight video) and a team would choose the best effort. Winner got a commemorative plate and Bob Hunt himself was kind enough to send a gift (one of his DVD-s).
I missed the challenge due to "life" entering my plans. I had my model close to finish process a few weeks before dead line....
Anyway covid enter the scene and with some extra time to spare it was time to finish her.
here´s first pictures. mine is based on original plans but with some changes, so i called her Holeshot Master. hope you enjo the ride
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first decision was engine : Os Max 35FP, then i blew up the surface areas about 10%.
i really dislike profile models, so a full body was drawn following the profile design.
as i was drawing the fuse it dawned on me: why not an I-beam? i really loved i-beams but never built one, so....let´s cut ribs
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Very nice bro
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in Brazil we have plenty CB 25 (local engine) laying around at almost every c/l flier workshop,
May we see a few photos of one, please .
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Very neat. When building an I beam, it is usually done upside down, with the bottom ribs going in first, except where the landing gear goes, assuming it it is bolted to the main spar. Then flipped over and the top ribs added including the half ribs, then back over for the LG and finish with those ribs. ALWAYS trim the ribs at the rear. Other wise the taper will not come out right. I have built over 20 I beamers and had to learn this the hard way. Be sure to cut about 12 extra ribs, because no matter how careful one is, you will break two or three. H^^
thanks Ty, would be nice if i read this before...now she´s almost on clear coat, but i think i have nailed this. It´s a constant chord wing, so the difficult was considerably minor, but thanks a lot for the helpful information, all of the mentioned problems showed up for sure! indeed it´s a lovely way to build wings
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The photos of your bench are pure fiction. No one has a bench that clean and neat...
A key ingredient in building and finishing a model as nice as this one. y1
Great thread here Fred, watching with interest.
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thank you all guys for the nice comments and for the funny one´s too!
glad you´re enjoying the ride
here´s the fuselage, i have opted for a side mounted engine as a homage to (yes i know lotsa homage here lol) to Bene Rodrigue´s stunnig ship Cheyenne 2000 (more on that later)
opted to carve and sand all top and bottom blocks (tack glued) before i had the ibeam on my way. Just sanded them and then took them off for the i-beam process
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May we see a few photos of one, please .
here´s a pic and the leaflet, this engine is a "copy" of the cippola engine,and sold a lot in Brazil for years, cottage industry made. had c/l and r/c versions and 2 types of piston/liner. runs good, starts easy and relatively easy to find for sale
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That's some nice work right there. Very clean. I really like the precision.
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That's some nice work right there. Very clean. I really like the precision.
thank you Randy! hope to do the same with your Ring!
regards from brazil
Fred
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You know, Fred, Now I'm going have to build another Ring. I got the templates out and started assembling the materials. Thanks for the prompting.
H^^
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You know, Fred, Now I'm going have to build another Ring. I got the templates out and started assembling the materials. Thanks for the prompting.
H^^
look forward to see it on your bench! you know i love your building Technics!glad you chose to build another one!
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after some thinking i have settled to a new stab unit to "look good" with the i-beam, so off goes the sheet stab and enters a build up one.
the fin is another "homage" to Bene Rodrigue´s Cheyenne 2000 i always loved the "fat" look with the ribs
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Your shop is so clean.
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gentlemen! after some 2 years, i am back with the holeshot, here´s bare bones images
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and... last weekend i´ve made the maiden flight, the max 35 was way more power than needed, final weight is 1040 grams, the lightest plane i´ve ever built
flew straight but too fast, still have to try a lower pitch prop but have made some figures to see how her reacts and i am very pleases. glide forever to land.
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side view
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more
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Wish I had seen this before the other post. You do some terrific work there. Bene will also be proud of you. D>K H^^
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Good looking plane and a beautiful job building it. Fred, you do fantastic work!....Gene
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Wish I had seen this before the other post. You do some terrific work there. Bene will also be proud of you. D>K H^^
thank you John, i am really pleased with the model, maybe will turn into a kit in the near future
regards
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Good looking plane and a beautiful job building it. Fred, you do fantastic work!....Gene
thanks Gene!
hope to fly more tomorrow ( brazilian holliday)
regards
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Hello Fred!
I like your workbench...it looks (excessively) neat and clean! ;D
C'mon! Spread some balsa dust around and post some pics!
Fantastic woodwork, by the way! 8)
Take care...
Claudio.
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Hello Fred!
I like your workbench...it looks (excessively) neat and clean! ;D
C'mon! Spread some balsa dust around and post some pics!
Fantastic woodwork, by the way! 8)
Take care...
Claudio.
hello Chacon, all fine there?
thanks a lot indeed!
the workbench is just for pictures LOL
kidding, i am a vaccum cleaner freak hahaha
but i admit that i neated up a bit for the pictures.
regards from brazil