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Silver Wolf's Chipper-too

A first scale build (Dennis Bryant)

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Andy Muckley04/12/2015 21:15:22
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365 forum posts
13 photos

Hi S.W. I, like Nev, have left them as built, as Nev said they match the wing and as it's washout it's not a bad thing.

When you assemble the ailerons and flaps to the wing all looks fine, it just looks wrong when laying on a flat surface. Hope that makes sense

Silver Wolf31/12/2015 19:07:41
167 forum posts
151 photos

Thanks Nev & Andy, the good news is that both left & right flap/ailerons are the same (well very nearly).

Looking down the length of the wing the washout does appear to be noticeable, if that was designed that way, then a clever bit of design.

wing_flap_aileron.jpg

Really seem to be struggling to get into any building, doesn't help having some other hobbies!

rh flap.jpg

Will start getting the flap linkage done next, should be interesting as I have never had a model with flaps before.

Really will try to get these done in the next week as I will not be able to get into loft after next week for a while.

Wishing everyone a happy New Year party

Especially those up north

SW

Andy Muckley31/12/2015 19:19:52
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365 forum posts
13 photos

Happy new year to you too. My build will start again in around 8 weeks, unless i get chance to do a bit in the spare room as new workshop being built

Danny Fenton31/12/2015 21:26:28
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9105 forum posts
3945 photos
Coming on well though SW, good to see you doing a bit on it
Happy new year

Cheers
Danny
Silver Wolf03/01/2016 19:55:12
167 forum posts
151 photos

Made a start on flaps, with no fixed for location for the position decided to make jig for bottom wing surface.

wing jig rear view.jpg

It also helps clearing the under carriage legs for work bench.

wing jig3_4.jpg

Bell cranks fitted, both hopefully at the same angle!

rh flap bc close up.jpg

flap bellcranks.jpg

Formed the first z bend for flaps, first time this has happened when cold bending.

cold bend.jpg

I have annealed the wire and it as formed as per expectations, will harden and temper once finished. Brings back memories of been an apprentice in the mid seventies.

SW

Andy Muckley04/01/2016 19:41:09
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365 forum posts
13 photos

Making good progress there S.W.

Nev04/01/2016 22:22:47
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592 forum posts
221 photos

Never seen one fracture like that before SW although I have snapped them before. I didn't bother with z's on my one just left them with a right angle bend and left the stubs just long enough so they couldn't unhook.

Looking good so far.

Nev.

Colin Leighfield04/01/2016 22:39:14
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5952 forum posts
2492 photos

The advice when cold working steel is to not bend to a radius of less than three times the steel thickness, otherwise there is a risk of strain-age embrittlement causing it to crack just like that. The higher the steel strength, the higher the risk. In practice we do bend tighter than that and usually get away with it, but the steel is work hardened and under heavy load would probably fracture. In practice, the loads we create aren't high, but that is what is happening.

I've done mine with separate ailerons in the wings, which made a lot of work and wasn't really necessary. I've used z-bends on the servos and clevises on the control surfaces.

Did you pick up on the problem with rapid wear in the fibre-glass hinges? Danny is putting in brass bushes, I've glued thin steel washers onto mine, to act as bearing surfaces for the hinge bolts.

Silver Wolf11/02/2016 21:54:50
167 forum posts
151 photos

Thanks for the heads up with the wear problem, I did manage to pick it up. It is one of the benefits of being behind everyone else, although it won't stop me making some of the same mistakes.

I think that I will also use washers, always had it drummed into me when I was an apprentice, never, never without a washer.

wing servos.jpg

Seemed to take an age to get the correct set up on the TX for the flap movement (never did like the programming on the ff9).

The ailerons were even worse, could not get each side to be the same. Eventually got there, but wasted a lot of time and caused some hanger rash. Very frustrating but at least lessons learned. Also reacquainted my self with bakers fluid, that just made the soldering so much easier.

aileron bellcrank.jpg

Well wing almost done, requires shrouds, LE, wing tips, and top centre sheeting. Weight at the moment is 680g including servos, so quite pleased. Not sure if I qualify for a "I survived a Dennis Bryant wing" tee shirt.

Will also need some shear webbing as I noticed that there was some torsional twist when I fitted the incidence meter on the wing tips.

SW

Danny Fenton11/02/2016 22:37:33
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9105 forum posts
3945 photos

Nice job, you are over the worst...... I like the "I survived a Dennis Bryant Wing" tee shirt idea Though perhaps a polo.....

I know a man..... how many shall I order?

Cheers

Danny

Silver Wolf13/02/2016 15:32:09
167 forum posts
151 photos

Wear them at Greenacres if enough interest.

Intend to replace wing dowels with steel cap head, what size. Normally use M5 or M6 slotted nylon, but was thinking about using M4 steal. Will be running a 4c in it hopefully a laser 80

 

 

Any thoughts chaps?

 

 

Edited By Silver Wolf on 13/02/2016 18:17:51

Silver Wolf21/02/2016 19:53:42
167 forum posts
151 photos

F3 former.jpg

Have decided to use 4mm cap heads for the wing retention.

F6 former.jpg

Formers F2-F7 fitted to crutch.

fusalage lower frt.jpg

Went to the balsa store only to find that there is no suitable wood, most of the wood is from a stalled Brian Taylor project. Most of his sheeting is 1/16, so off to order some 1/8th from Balsa cabin.

While waiting for the that I will ponder on engine, I think it is going to be a Laser, not sure if it will be the .70 or the .80

SW

Edited By Silver Wolf on 21/02/2016 19:57:05

Silver Wolf05/03/2016 12:39:26
167 forum posts
151 photos

Balsa store now replenished with fresh wood from Balsa Cabin, very good and friendly service.

 

balsa draw.jpg

Doublers and formers glued ready for some planking.

fuselage doubler.jpg

 

I can accept that the formers may need some modification to allow them to be central but am a little concerned that I have had to add wood to formers to ensure a straight edge. However despite this everything appears to be central and true, just hope that upper fuselage will match!

mods to lower formers.jpg

lower fus formers.jpg

Hope to get most of the planking done this weekend, although it looks like it is flying weather tomorrow.

SW

Edited By Silver Wolf on 05/03/2016 12:39:42

Silver Wolf01/05/2016 15:39:03
167 forum posts
151 photos

Well lower fuselage has been planked and had a rough sand.

The fit of G2 will require a little bit of fettling, intend to remove a little from G2 where it meets the fuselage sides but want to keep the shape of G2 and add a little to the bottome of the fuselage to make up the difference.

 

rear view wing fairing.jpg

However I need to check the wing incidence as the fit to the wing needs a lot more work to get it to fit.

wing initial fit.jpg

 

 

I will get G2 correct and glued to the fuselage first then get the wing to match and at the correct angle.

 

SW

Edited By Silver Wolf on 01/05/2016 15:40:05

onetenor01/05/2016 16:36:36
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1900 forum posts
Posted by Silver Wolf on 03/01/2016 19:55:12:

Made a start on flaps, with no fixed for location for the position decided to make jig for bottom wing surface.

wing jig rear view.jpg

It also helps clearing the under carriage legs for work bench.

wing jig3_4.jpg

Bell cranks fitted, both hopefully at the same angle!

rh flap bc close up.jpg

flap bellcranks.jpg

Formed the first z bend for flaps, first time this has happened when cold bending.

cold bend.jpg

I have annealed the wire and it as formed as per expectations, will harden and temper once finished. Brings back memories of been an apprentice in the mid seventies. Radius too tight mare Bend round a rod in the vice next time .You should recall how to do that He He Having bent the z now it should be work hardened enough to not need further treatment

SW

onetenor01/05/2016 16:55:02
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1900 forum posts

BTW Re the wing jig I use a book ( or two )

Silver Wolf21/12/2016 09:54:57
167 forum posts
151 photos

Just about to start setting the wing incidence, there seems to be no information on the plan. I seem to remember that that someone mention -1.5 for the tail.

After measuring from the plan it seems that the main plane is +2 deg and tail plane 0 with the datum being 0 deg and centre of fuselage.

Any comments welcome

SW

Denis Watkins21/12/2016 11:02:25
3877 forum posts
59 photos

Wire takes many forms chaps, and that looks like rolled wire, as the crystals are folded as they are extruded, and with tight bends the wire will fracture just like that. If there are not so many to make, then with that particular wire, they are best formed having heated to cherry red, but as this cannot be tool or silver steel, it should not temper, but it will still be stiff enough for a control rod. Brilliant build by the way, the wing looks spectacular.

Edited By Denis Watkins on 21/12/2016 11:03:20

Silver Wolf01/01/2017 14:59:38
167 forum posts
151 photos

Well I’ve managed to make a right dogs dinner of the wing seating.

wing seat gap.jpg

Set up the wing to give and incidence of 2 deg and filled the gap with balsa.

wing seat blocking out.jpg

Although the wing incidence seems correct at 2 deg, there is some centre section misalignment, I will deal with this later as the measurements seem correct.

All measurements are with 1-2mm, the only exception is that i have one wing panel 3-4mm longer than the other.

wing measurment.jpg

Pleased that the diagonal from wing tip to centre of fuselage (rear) is the same and wing tip heights within 1mm of each other (both LE & TE)

After sorting the wing seat out it looks like this.

wing seat before blocking out.jpg

Hope to start the top fuselage but must admit that enthusiasm for this project is waning. Some of this due to starting this in late 2014 and having breaks from building a flying for various reasons, although now any DIY projects will be done when I decide.

Wishing everyone happy new year.

SW

Colin Leighfield01/01/2017 15:19:54
avatar
5952 forum posts
2492 photos

Hi SW, I know how you feel, I've had moments of self-doubt with mine, but I'm clearing the decks now to get on with the process of finishing it.

I treated my wing seat similarly to yours. The full-size has wash-out but for some odd reason it isn't shown on the plan. I think I built in two degrees,(must go back and check that) and increased the root incidence by half of that to keep the nett angle of incidence overall the same as on the plan.

Happy New Year to you too.

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