Analysis and Design of Aircraft Structures
Index:
Accelerated Motion of Rigid Airplane ……………………………………..A4.8
Aircraft Bolts………………………………………………………………………D1.2
Aircraft Nuts ………………………………………………………………………D1.2
Aircraft Wing Sections – Types………………………………………………A19.1
Aircraft Wing Structure: Truss Type………………………………………..A2.14
Air Forces on Wing……………………………………………………………. A4.4
Allowable Stresses (and Interactions)………………………………………C11.36
Analysis of Frame with Pinned Supports…………………………………..A9.16
Prior to bonding loosely assemble panels together ensuring all joins mate fully. All bonded joints will require clamping during cure. Clamps should not apply pressure to the joint directly, but to the panel surface adjacent to each joint. Ensure clamp pressure is spread evenly down the panel. Prepare tooling as required to ensure corners will be cured under pressure 90 ° to each other. Structure may be bonded in stages to improve ease of manufacture.
Clean all mating surface prior to bonding by removing loose material. Use only oil-free compressed air. Lightly abrade bonding surface of panel skins (tongue sections) using 240 grit paper or 220 grit aluminium oxide grit blast. Protect non-bonding surfaces and core against sanding/grit blast damage.
Remove all dust using oil-free compressed air and wipe bonding surfaces clean using a clean white cloth moistened with MEK. Wipe in one direction only using a new section of cloth for each wipe. Wipe exposed core clean using MEK to remove surface contaminants. Do not allow MEK to pool on surface. Protect prepared surfaces from contamination.
All panel intersections are to be bonded with Hysol EA9309.3NA adhesive. Prepare adhesive in accordance with EA9309.3NA data sheet. A small amount, maximum 5% by weight of phenolic microballoon may be used to thicken adhesive if required. Ensure all bonding is carried out in a dust-free environment. Personnel handling cleaned and surface prepared components are to wear disposable gloves.
Apply EA9309.3NA to the core and skin surfaces of all mating components (tongues and grooves). Apply sufficient adhesive to the core components to fill exposed cells. Sufficient adhesive is to be applied to the skin surfaces to ensure squeeze-out of the adhesive occurs during bonding.
Clamp panels together, progressively increasing clamping pressure until joints are held solidly and a square assembly is achieved. Clamp only using hand force to tighten. Do not over clamp.
Form a fillet of adhesive along the inner surface of each joint nominally 2mm x 2mm wide except along the joints where internal reinforcing angles are to be installed. Ensure exposed core of finger joints are filled with adhesive. Clean up remaining adhesive using a cloth moistened with MEK prior to the adhesive curing. Retain a small amount of adhesive on a separate piece of aluminium to verify proper cure.
Cure in accordance with Hysol EA9309.3NA data sheet. Remove clamps after cure and check integrity of the bond by applying slight pressure to the joints and check the squareness of the assembly.
Lightly abrade bonding surface of panel skins and angle sections using 240 grit paper or 220 grit aluminium oxide grit blast. Protect non-bonding surfaces and core against sanding/grit blast damage.
Remove all dust using oil-free compressed air and wipe bonding surfaces clean using a clean white cloth moistened with MEK. Wipe in one direction only using a new section of cloth for each wipe. Continue wiping until no discolouration of the cloth occurs. Do not allow MEK to pool on surface.
Wipe each bonding surface with Turco WO1 using a clean white cloth to apply the etch primer. Wash primed surfaces with clean water. Protect prepared surfaces from contamination.
Reinforcing angles are to be bonded with Hysol EA9309.3NA adhesive. Prepare adhesive in accordance with EA9309.3NA data sheet. Ensure all bonding is carried out in a dust-free environment. Personnel handling cleaned and surface prepared components are to wear disposable gloves.
Apply EA9309.3NA to the bonding surfaces of the reinforcing angles Sufficient adhesive is to be applied to the angle surfaces to ensure squeeze-out of the adhesive occurs during bonding.
Clamp angles in place, progressively increasing clamping pressure until angles are held solidly. Clamp only using hand force to tighten. Do not over clamp.
Form a fillet of adhesive along the edges of each clamp flange. Clean up remaining adhesive using a cloth moistened with MEK prior to the adhesive curing. Retain a small amount of adhesive on a separate piece of aluminium to verify proper cure.
Cure in accordance with Hysol EA9309.3NA data sheet. Remove clamps after cure and check integrity of the bond by tap testing for voids. No voids permitted.
All exposed core edges are to be filled with Hysol EA9309.3NA/Microballoon mix after assembly.
Push the core back from the edge of the panel skins approximately 2-3mm.
Prepare adhesive in accordance with EA9309.3NA data sheet. A small amount, maximum 15-20% by volume of phenolic microballoon may be used to thicken adhesive if required.
Fill the gap between the panel skins flush with the edge of the panel using the adhesive mix. Clean up remaining adhesive using a cloth moistened with MEK prior to the adhesive curing.
Cure in accordance with Hysol EA9309.3NA data sheet.
Bonding Non-Structural Edging Angles
Remove all dust using oil-free compressed air and wipe bonding surfaces clean using a clean white cloth moistened with MEK. Wipe in one direction only using a new section of cloth for each wipe. Continue wiping until no discolouration of the cloth occurs. Do not allow MEK to pool on surface.
Edging angles are to be bonded with Hysol EA9309.3NA adhesive. Prepare adhesive in accordance with EA9309.3NA data sheet. Ensure all bonding is carried out in a dust-free environment. Personnel handling cleaned and surface prepared components are to wear disposable gloves.
Apply EA9309.3NA to the bonding surfaces of the edging angles Sufficient adhesive is to be applied to the angle surfaces to ensure squeeze-out of the adhesive occurs during bonding.
Clamp angles in place, progressively increasing clamping pressure until angles are held solidly. Clamp only using hand force to tighten. Do not over clamp.
Form a fillet of adhesive along the edges of each clamp flange. Clean up remaining adhesive using a cloth moistened with MEK prior to the adhesive curing.
Cure in accordance with Hysol EA9309.3NA data sheet. Remove clamps after cure and check integrity of the bond by applying light pressure to the angles.
Page A4.3, column 1, equation 3, should read
“V^2 – Vo^2 = 2as”
(first velocity term must be squared)
And then there’s the previously mentioned page B1.8, Equation 3,
“…= f/F0.7 + (3/7)*(f/F0.7 )^n
Welcome to the Bonsai Blog!
Unlike most Blogs on the web this one is dedicated to plants, more specifically Bonsai, these little trees change immensely during their life cycle and it can difficult to track changes and remember what they looked like before they got re-potted or a complete makeover!
v1.15, August 2002
This document provides information on how to setup a transparent caching HTTP proxy server using only Linux and squid. Read More
Repotted, received a new pot with a side swimming pool 🙂 – this pot was previously used on a not so lucky Bonsai and was purchased from a Bonsai man at the Flemington Markets some years ago.
Natalensis Fig #2.
Estimated to be Established in 1994
Inherited from the late Arty Latta
After having my beloved Sony DSC-V1 stolen from my car..(assholes) the decision must be made …what camera to get to replce it….the obvious and favoured choice is the next camera in the series..the SONY DSC-V3, excellent revies…only one downer with it is the auto ISO setting during the P mode….has the tendency to dive higher ISo valuse during bright lights….reduces the quality…apprently tho u just need to watch the ISo and it is great….
The only other camera I was seriously looking at was the Canon EOS 350D, this cammera is in a totally different league tho…this is SLR whereas the sony is more compact which is what i am looking for…
nice review here http://www.dcresource.com/reviews/sony/dsc_v3-review/
also the other golden site www.dpreview.com
will probably go the sony….the first V1 served me well….and all the obvious issues i had with it have been corrected…
Well, just finished a nice Easter weekend away, took an additional day of work to make it that litlle bit longer…and to avoid the tourist traffic pain!! Sarah and I went up to Evans head an Tween heads for the long weekend, mainly to visit sar’s family.
Started the drive on the thursday night to get an early start on the traffic, made it Newcastle and stayed with one of sar’s mates, Newcastle is not so bad…..seems relatively cheap place to live which is not a bad thing….got off eraly on the friday morning and drove all the way to Ecans Head with several stops along the way…Kendall, some little place near coffs, and somewhere else along the way..:)…whole trip used 1 tank of fuel in the mighty falcon…775km..not to bad.
Spent the night in Evans Head and then headed up to Tweed heads, went to the beach of course and aslo checked out the Thursday Plantation (Teat Tree oil mainly), stopped at Crystal Castle and picked sar up a little pressies…a nice ring and necklace…Stayed in Tweed for the night and went for a short bush walk at Border Ranges National Park…(Mental note….go back there it is very nice!!) followed up the day with family stuff…
Back to evans head for some more holidaying and then back to sydney on the tuesday..traffic was fine no major dramas….holiday was fine although a camera would have been nice….
and as always holiday not long enough….
Well i dont really like melbourne…and i really dont like it now since all i do there is bloody well work….
Arrived down here on the Monday on a morning flight which was uneventful except for the usual jammed in knees and cramps…..curse the small seat pitch on virgins jets…Spent most of monday and tuesday establishing where we are up to in the projet (which is th installation of the Daedulus Line Scanner) and how much stuff the sheeties have pulled out of the aircraft. It seems the project is moving along very quickly and the amount of work we have done currently will be consumed by the sheeties and mintenance guys will be swallowed up fairly quickly. My main job for this project so far has been the Rack installation and the FEA modeling of the pressure box, which has been nothing but painful…mainly due to the requirement of having the ability to retrieve fastener loads from the model, which means there must be beams (BEAM 188) joining keypoints on all of the fastener positions…biggest problem with this is actually modelling the geometry and gett Ansys to do what we want…..key points to remember…
– If drawing in AutoCad ..ensure that all regions line up and there is no strange gaps or misalingments in the regions…which i had to start with….which i painfully removed and check one by one by zooming in to the max to determine if there was any misaligment….
– Find a btter way of generating geometry…..
Once all the data (in the form of a .satfile) was in ansys it was not too bad…..the analysis actually came out real good…and fairly accurate, when compared to hand calcs of Alans….. I have learnt heaps of Ansys during this short time…everytime i use ansys i learn more….
Mental note while i remember…I have 4 days owing now due to the issue of working on Sunday….(3 from last year – 1 this year)
We are staying in lovely Essendon, which seems nice…
will update towards the end of the week…..
Well again its been way too long since my last plog! This plog however is dedicated to the Wave Aid concert that sar and I went and saw last saturday. Excellent day/nite…. the line up of acts included:
Waifs – missed them cause we were late…shame, i have heard they are pretty good….
Missy Higgins – was good, not necessarily my style but can definitely appreciate her talent…
Nick Cave – never really like him…songs too long and not my style….ate chips and icecream instead!!
Casey Chambers – excellent, one of the few counrty music acts that can make in the ock scene also…very talented singer….her dad is on theband!!
The Wrights – performed Evie (spellin) parts 1-3. The original never did it for me so….what can i say….pretty impressive tho since the ppl included, lead singer from Jet and a few other top bands that i cant remember..
Pete Murray – great singer….top act…plus the girls love hime!!!
SilverChair – never seen these guys before….its been along ime since they played together so one would expect them to be a bit rusty…which they were….nonetheless ok.
Powderfinger – excellent live band….woulda paided the money just for them alone….
Midnight Oil – again…a band who reformed just for this concert…the only one who really made an effort to identify the real reason for the conceert….Peter Garret is an excellent showman….sounds awesome live also.
Got some ok pix of the concert and some neat video footage as well….they had some fireworks during the night….not much to comment on but..hey …better than a kick in the ass….
The walk down cleveland street in thongs was a bit rough….but quicker that getting a bloody bus to central….
Overall it was an excellent day….it was also great to spend some time with sar, time seems to be harder and harder to find now……
Will post some pix and vids of the day on the gallery…..
Well, after quite some time dicking around with exim, i decided to give another mail server program a go…sendmail was outta the question, qmail i tried but was too fiddly…plus just did not work! so last on the list was postfix….i read mixed comments regarding this mail program…but hey, why not give it a go…in addition it has i good webmin config….
spent one weekend on and off installing and tweakin’ the config file…all up the actual config was quick easy and painless, the most problem i had was configuring the firewalls and bloddy telnet to let access to the system….maybe the system is a bit to secure…or unusable…
none theless the mail server is operational and mail can be sent from the user accounts on the server and can be recieved…..only thing to get working now is the pop server and remote mail delivery!!!
Well, looking at those dates it would appear i have not blogged anything for some time, does not mean i have not htought about it tho!! 🙂 .What has happened in the last month of any real significance???
not a great deal i am thinking, however a few memorable notes to reflect on …..
second solo flight after a substantial amount of aircraft downtime, surprise, surprise!! second solo flight consisted on 4-5 ccts with the instructor on the saturday morning, it was quite busy which resulted in a number of go-rounds, good for practice. I then proceeded to do 3 solo ccts which all went sweet. Lucky i got a keen instructor who keeps pushing me to keep flying….then again i am just an hours slut!! 🙂
third solo flight, what a gem, scared absolutely shitless but is was fun , no major f*** ups which is always good!! even had a runway change in there!
fourth solo flight…had major head-ache..was tired..first few ccts went well..greased them in….last few were terrible, cross-wind had come up and i was struggling, bounced the last few in…must practice cross-wind technique…
will be heading out the training area for training area training..too many trainings in there!! should be fun..better than flying round in cirlces all day!!
newsworthy item – a duchess came down during the week, it appears the pilots are ok. They were doing a engine failure approach….one engine fully feathered, for some reason unknown to myself the tower initiated a go-round, of course the poor ol’ duchess cant do anything with an engine out! It would be nice to know the facts..will have to wait until the ATSB report comes out.
Spent the weekend of the 23rd up at mums in the lovely countryside, always a nice drive up there…just as long as u dont have to do it too much!!!
Work is exciting as ever, CASA212 is bleeding off, thank f***….no got crazy pod shit….never thought i would be doing this kinda work when i graduated.
Had my review last week, was ok, got payrise and all…still think i am seriously under paided. key points for this month are….do work to hard…its not worth it!! have a life and be fit and healthy…this is more important than a career.
Another item of interest!! had the phone disconnected for about 6 weeks…what a blessing!!! shoulda paided the bill i suppose tho!!..oh well the 60 buck connection fee is heaps less than what it woulda cost to have it on with this household. Speaking of rippoffs…bloody parking fines….fined for parking nose to kerb instead of ass to kerb…the worst part…i went back to the car to put the snorkelling gear in the boot and the parking inspector was two cars away giving some other poor prick a fine….they could have a least said something…lousy f***s
This weekend has been interesting…mums been down, sisters have come out to play…makes for one very stressful visit!!! nonetheleess life will go on..
hopefully the next plog will be sooner rather than later….