< Back uAVionix AV30E approved as a back-up EFIS 8 Jun 2023 We've recently added the uAvionix AV30E to our list of approved backup EFIS units for use in Permit aircraft. The EFIS units listed in TL3.20 may be used without further reference to LAA Engineering, although your LAA inspector will need to make a Permit Maintenance Release (PMR) entry in the airframe logbook quoting this Technical Leaflet reference. Next Previous

< Back *DEADLINE EXTENDED!* Design the LAA 2026 Rally Poster Competition 2 Feb 2026 LAA “Design the LAA 2026 Rally Poster” Competition: Entry requirements The Light Aircraft Association (LAA) invites members, their friends and family who are 16+ to take part in our Design a 2026 Rally Poster competition celebrating the 80th Anniversary of the LAA. We’re looking for exciting, imaginative poster designs that capture the spirit of the LAA, celebrate homebuilt and vintage aircraft, and highlight the future of general aviation. Whether you’re a seasoned designer or a first time creator, we’d love to see your vision! Children’s competition Alongside this, we are also running a children’s design a poster competition, to inspire our young aviators to get creative! Parental consent required for under 18s. Shortlisted entries in this category will be displayed at the Rally. Age categories 3 – 6 7 – 11 12 – 15 Theme “Celebrating 80 years of the LAA” - building, flying and Innovation. Entrants may interpret the theme however they wish. Ideas could include: LAA homebuilding heritage The community spirit of the LAA Spirit of flight Future aviators and innovators Safety, engineering, sustainability, or adventure within GA Iconic imagery associated with the Rally A celebratory anniversary feel for the LAA 80 th ! Creativity is encouraged! Who Can Enter This is a competition for ages from 16+ . Anyone under 18 will require parental permission. The children’s competition is in three age groups. Poster Requirements Format: Poster size: A4 (portrait or landscape) Accepted media: hand-drawn, painted, digital artwork, mixed media All entries must be submitted as: A high-resolution JPG or PNG, or A PDF suitable for printing Design Requirements The poster must include the title: LAA Rally 2026 and mention the 80th Anniversary. LAA logo (download link will be provided). Date and location of the Rally – 4 th , 5 th and 6 th September 2026 at Leicester Airport The UK’s biggest International Fly in. No copyrighted images or AI-generated stock art unless you own the rights. The poster can include aircraft, venue (i.e. from above with parked planes). Themes from any era (Design themes from any era). Key Dates Deadline for submissions: 14th February 2026 Shortlist announced: 20th February 2026 Winner announced: End of February 2026 Judging Entries will be judged on: Creativity & originality Visual impact Relevance to the theme Suitability for use as an official event poster Prizes Prizes include: Your design featured in official LAA promotional materials. Design becomes the official 80 th Rally poster. A printed, framed print of your artwork 2x VIP all access event passes Presentation at the LAA Rally 2026 LAA merchandise and goody bag. *Prizes subject to change, subject to partner availability. 2 nd and 3 rd prizes for runner ups: Printed certificate Goody bag Children’s category prizes: LAA goody bag Printed certificate Poster displayed at the 2026 Rally Presentation at the 2026 Rally Terms & Conditions By entering, you grant the LAA permission to reproduce your artwork for promotional use across all media including social media, website and printed. Grant LAA permission to print artwork to sell. Artists retain copyright of their work but not print or re-sell. Entrants under 18 must have parent/guardian consent. The judges’ decision is final. The LAA reserves the right to withdraw entries that do not meet the guidelines. We reserve the right to adapt the design to best meet our needs. Submission Process: How to Enter Entries with artwork file to be sent by email to: [email protected] with: Full name Age category if child entry. Contact email and/or phone Confirmation that the artwork is your own original work and that you grant the LAA permission to reproduce your artwork for promotional use. Contact For questions, contact: [email protected] LAA Office: Address. Head office. Turweston Aerodrome, Nr Brackley. Northants. NN13 5YD. Next Previous

Preliminary Design Preliminary Design is the stage where the design is sized and developed in outline, leading to a three view drawing, performance and weight predictions. To help with this, LAA has developed a number of spreadsheets. Spreadsheet 1 is used to develop the basic geometry of the proposed aircraft, size the wing, fuselage and tail surfaces and work out some of the key parameters used later. Spreadsheet 2 is used to estimate the performance of the aircraft based on the geometry, initial weight estimates, engine power and guestimates of the drag coefficient and prop efficiency, allowing you to see how the performance is affected by changing each parameter in turn. Spreadsheet 3 is used to work out the critical structural speeds, develop the flight envelope and predict the aerodynamic loads on the main surfaces which can be used to size the structure, and as the basis for a load test program. The weight and balance spreadsheet elsewhere on our website allows the designer to quickly evaluate the implications on weight and cg of different positions for the crew, fuel tanks and baggage bay, and work out what empty aircraft weight and cg he must aim for. Thanks to the simplicity of these programs it takes only minutes to study the implications of changing the aircraft’s specification, for example the effect of changing the wing aspect-ratio, the trade-off between extra weight and cleaning up the airframe drag, extra power etc. Downloadable Spreadsheets Worked Spreadsheet Examples Design Tutorials

Light Aviation Magazine 2023 Click on the links below to open each issue of Light Aviation Magazine from 2023 January 2023 April 2023 July 2023 October 2023 February 2023 May 2023 August 2023 November 2023 March 2023 June 2023 September 2023 December 2023

< Back LAA 'Grass Roots Fly-In' returns 23 Apr 2023 The LAA is returning to the green grass of Popham Aerodrome in Hampshire for a repeat of its “Grass Roots Fly In” from 18th to 20th August 2023. The Fly-In will again on one hand take the Associate back to its traditional roots, while continuing to offer the first chance to see some of the latest aircraft and products in the recreational aviation market. What was particularly notable about the 2022 Popham event was its sociality. LAA members and exhibitors alike commented on its relaxed and friendly atmosphere, with post-event comments such as “It’s a great reunion as well as a fly-in–cum trade show” and “super friendly, the event always had a good vibe”. A joint venture with Popham Aerodrome, the LAA Grass Roots Fly In will develop its strengths as a social event bringing flyers from around the UK and Europe to meet fellow enthusiasts. The grass runways at Popham and the airfield’s famed rural ambience will mean that the event will focus on the fly-in and social element as much as on a large exhibition campus. The earlier mid-August date will also mean longer evenings, allowing more scope for flyers from further afield and hopefully, milder conditions for those who choose to ‘camp under the wing’. Said LAA CEO designate Simon Tilling: “The LAA Grass Roots Fly In was a great success last year, with over 3,000 visitors, more than 30 exhibitors and a total of 350 visiting aircraft through the weekend. It is a different event to the past, larger scale LAA Rallies and we’re working on plans for the continuation of a larger scale LAA event in the future. For this year, we’re looking forward to another great, social and fun, LAA fly in”. Next Previous

< Back Permit Revalidation Forms updated 1 Dec 2023 The Airworthiness Review Report (LAA/ARR-1) and Permit Revalidation Application (LAA/PTF-REVAL) forms have both been upissued to Issue 6. These forms form part of the Permit to Fly Revalidation Process. The latest issues of the forms can be downloaded here . Technical Leaflet 2.00 (Revalidating your Aircraft's Permit to Fly) has also been updated to Issue 5 to reflect these changes and can be downloaded here . Next Previous

< Back Engineering updates in January 5 Feb 2025 The following documents have been issued/updated in the Engineering 'Info Library' during January. Continuing airworthiness information : Mandatory Technical Directive 01-2025 - Zenair tailplane brackets TADS : Glasair Jabiru engine Pietenpol Aircamper Scottish Aviation Bulldog Zenair CH 750 Cruzer Miscellaneous: Links to the relevant Technical Leaflets and forms added to the Night/IFR section Next Previous

< Back Christmas 2025 Closing Dates The LAA will close on Wednesday 24th December at midday and re-open on Monday 5th January 2026. Wishing all our members a Very Merry Christmas and a Happy New Year! Next Previous

LAA Rally 2025 "Inspired to Fly" LAA are proud to announce our Rally 2025 sponsors We are pleased to announce that the LAA Rally will be held in conjunction with Leicestershire Aero Club at Leicester Airfield on 29th-31st August 2025. Are you interested in sponsoring the event or advertising in the Weekend Show Guide? OR Do you want to display your aircraft project in the Homebuilders tent? Contact Nancy Lillington at [email protected] WELCOME TO THE LAA 2025 RALLY FLY-IN ENTRANCE FEES GENERAL INFORMATION FLYING IN & BOOKING A LANDING SLOT CAMPING & ACCOMMODATION EXHIBITOR INFORMATION OPENING TIMES & CAR PARKING OTHER ATTRACTIONS TROPHIES & AWARDS

Operating & Maintaining Aircraft This section is intended to cover everything that happens once the aircraft is in a flying state. From a technical point of view, the most import of these is keeping on top of the aircraft’s maintenance. This is critical in enabling an owner to meet their obligation to maintain the aircraft in an airworthy condition. AIRCRAFT MAINTENANCE AVGAS UL91 & UL94 ETHANOL-FREE MOGAS WEIGHT & BALANCE E5 MOGAS REVALIDATING A PERMIT TO FLY 97 OCTANE SUPER-UNLEADED E10 MOGAS - NOT APPROVED

< Back Alert 05-2024 - Rotax Oil Spray Nozzles - upissued to Issue 2 24 Jul 2025 LAA Alert 05-2024 - Inspection and/or Replacement of Oil Spray Nozzle in some Rotax 900 series engines - upissued to Issue 2 On 16.12.24, Rotax issued a MANDATORY Service Bulletins SB 912 i-016/SB 915 i-016 / SB 916 i-006 and SB-912 i-016iS / SB-915 i-016iS / SB-916 i-006iS which call for urgent action for engines of specified models within certain serial number ranges, if the engine has run for less than 200 hours from new, or engines which have been fitted with specific overhaul kits supplied between 01.01.22 and 31.10.24 inclusive. Therefore, LAA Alert A-05-2024 was issued on 17th December 2024 regarding this. Subsequently, a revision to the Rotax Service Bulletins was issued on 20.12.24, entitled MANDATORY Alert Service Bulletins ASB 912 i-016 R1/ASB 915 i-016 R1 / ASB 916 i-006 R1 and ASB-912 i-016iS R1 / ASB-915 i-016iS R1 and ASB-916 i 006iS R1. Therefore, on 23rd July 2025, LAA Alert A-05-2024 was upissued to Issue 2, which now supersedes Issue 1. A-05-2024 Issue 2 can be found HERE and is also found below. The bulletin concerns problems with a possible full or partial blockage of the oil spray nozzle due to an excessive application of Loctite at the manufacturing stage, when assembling the sprag clutch housing. This can lead to inadequate cooling of the stator assembly, potentially causing loss of electrical power to the engine’s ECU. A-05-2024 Rotax Engine Oil Spray Nozzle Issue 2 .pdf Download PDF • 232KB Next Previous

Hirth 2 Stroke Covering Letter to Owners Fuel System Inspection Checklist