CORONA VIRUS - UPDATE March 17th 2020

At this time we are operating close to normal. However, the web site may not be accurate, particularly regarding price and availability. as transportation within Europe is uncertain and the status of our suppliers varies on a day to day basis

We will endeavour to provide the best possible service whilst protecting ourselves and our associates from this virus.  

We have limited stocks of Total Aviation Engine Oils at clearance prices. Both the Total Aero D80 and Total Aero Straight 80 are now just £4.25 per litre including VAT. Stocks will not be replenished, so when they are gone, they're gone. However the Multigrade and the 100 grade are now all sold out. 

Welcome to Sandalwood Services  THE PLACE for the continuing support for your Jodel or Robin Aircraft
the Market Place for the sale of Ex Airworld UK Stock.

We have  acquired a significant proportion of the stock following Airworld's closure in November 2016 but are also committed to maintaining a supply of Robin and Jodel parts to help the private owner and small business.
We have also retained the format of the old Airworld website to make navigation easier

Many of the items shown on this site are in stock, others may be obtained to order, and there are also some that have yet to be uploaded, so if you don't see exactly what you want please email your requirements to

Because Sandalwood Ltd is, and will remain, a small company we are not registered for VAT and so all the prices on this web site INCLUDE ANY VAT CONTENT. So no nasty surprises when you see the invoice.
This also means that VAT cannot be shown as a separate item on your invoice.

Payment for any item that you wish to buy will be by Bank Transfer. We will process your order and then send you payment details as when your order is ready to ship.



You are here: Home > Avionics and Headsets > Transponders, Transceivers and Encoders

Trig TT21 Transponder (303554)

Product Code: 303554

 The TRIG TT21 MODE S Transponder
Also included is the Airworld Custom Fitting Kit that includes a free Antenna, Antenna and Interconnect Cables and makes installation almost "plug and play".

For a limited period we are charging just £10.00 for shipping to almost any country in the World.

Launched on the Airworld Stand at the S.P.L.A.S H Exhibition at the NEC in December 2008 this has become a best selling favourite. With a front panel controller smaller than a standard instrument, and a remote transponder that is not much bigger than a pack of cards, the TT21 can fit into the smallest of aircraft – and yet it is fully certified and compliant with all the transponder requirements.

  • Low Weight - less than 500 grams!
  • Minimal Panel Space
  • Low Power Consumption
  • 130 Watts Nominal Output
  • Integrated Altitude Encoder
  • Simple Installation
  • Support for 1090ES ADS-B Out
The TT21 can be mounted in a standard 57 mm (2¼ inch) instrument hole, or where space is really tight, in a compact mounting just 42 mm high.
The TT21 IS fully ETSO approved for fitting to European and FAA registered aircraft, and at Airworld we have been selling units to great aclaim from customers since May 2009.
We are now taking orders at the special price of £1430 plus VAT which includes both interconnect and antenna cable a free antenna and if you wish free programming of your unit with your aircraft details

When you buy your Trig Transponder from Airworld we include
And we programme your transponder with your aircraft details.

Simply order your transponder on line and we will contact you for details of the cable lengths you require. And if you havn't planned the installation, well that's OK too. We can send your unit, and the cables can follow, at a later date, once you have decided where everything will be located.

Airworld will not be beaten on price and this is a "PRICE CHECK" Item. Found a lower price elsewhere? Then please tell us and we`ll endeavour to beat it.........PLEASE CONTACT US ON 01 296 714 900 for details of our special TRIG DEALS. All Trig Transponders are in stock for immediate dispatch.

Our Price: