Cold Fingers, Warm Shed: Sewing a Transmitter Muff from Charity-Shop Fleece

There is a particular kind of misery that arrives at the strip around the end of November. The model is ready, the thermos is full, the sky is a hard, bright blue — and your thumbs have gone on strike. A transmitter muff is the obvious answer, but the shop-bought variety can easily set you back thirty or forty quid, which feels like a lot for a bag with a window in it. So this month’s bench project is a cheap, repeatable alternative: a fleece muff that costs about a fiver in materials, fits a typical UK club transmitter, and can be run up in an evening while the kettle does its work.

The pattern is barely a pattern

You do not need dressmaking skills for this. The whole thing is a rectangular sleeve with an elasticated opening at the back, a clear window at the front, and a pair of zip-tie loops to keep it anchored around the transmitter case. Start by measuring your transmitter. A typical Spektrum or FrSky box is around 180mm wide, 120mm tall and 40mm deep at the grip, but take your own numbers — a muff that fights the sticks is worse than cold hands.

Cut two rectangles of fleece: one for the front panel, one for the back, each roughly 260mm wide by 190mm tall. That gives you enough slack to drape over the gimbals without pulling. Fold the top edge of each panel over by 20mm and stitch or staple a channel for the elastic. At the bottom, leave a 60mm gap in the centre of the front panel — this is where the clear PVC window goes.

Materials that do not need a model shop

The fleece is the easy bit. A single adult-sized fleece blanket from a charity shop will yield two muffs, and the offcuts make decent transmitter-screen wipes. Look for a tight, low-pile fleece rather than a fluffy one; the latter sheds over your gimbals and collects grass. Clear PVC is available from fabric shops by the metre, but a heavyweight document wallet or a clear plastic ring-binder sleeve works just as well and costs pennies. You want something stiff enough to stay flat but thin enough to see through when your breath starts to fog it.

For the window, cut a piece of PVC about 100mm by 70mm and stitch it behind the gap in the front panel, or use a thin bead of hot glue if sewing is not your thing. Elastic: 6mm flat elastic is ideal. Zip ties: four small ones, used to make loops that slip over the transmitter’s neck strap lugs or around the case. A couple of small press studs or a strip of Velcro for the bottom closure will stop the muff flapping in the wind.

Build it in five steps

1. Cut the fleece panels and the PVC window. 2. Sew the elastic channel along the top edge of each panel, leaving a gap to thread the elastic through. 3. Attach the window to the front panel. 4. Join the two panels along the sides — a simple running stitch is fine, or use fabric glue and leave it overnight. 5. Fit the zip-tie loops and the bottom closure. Total bench time: about ninety minutes, plus drying time if you have used glue.

Ventilation, screen and antenna safety

A sealed muff is a fogged muff. Leave a small vent gap at the bottom edge, or fit a short strip of Velcro that you can crack open between flights. The PVC window should sit clear of the transmitter screen — if it rests directly on the glass, condensation will make it useless. Keep the window at least 10mm proud of the screen by sewing a small fleece spacer behind it.

Antenna safety matters more than warmth. Do not let fleece or elastic loop around the antenna base, and never tuck the antenna inside the muff. If your transmitter has an external antenna, cut a small notch in the top edge and reinforce it with a stitch. Check that the muff does not press on the sticks or the side sliders when your hands are inside. A quick ground-range check before the first flight is sensible — not because fleece blocks 2.4GHz, but because a muff that shifts your hand position can make you clumsy on the sticks.

The cold-morning field test

The muff went to the club strip on a Sunday when the car thermometer read 2°C and the grass was white. Three of us flew the same foam trainer in rotation: one with bare hands, one with a shop-bought neoprene muff, and one with the fleece version. The bare-handed pilot lasted about eight minutes before heading for the car. The shop-bought muff kept the chill off, but the window fogged on the inside after two flights and the whole thing felt bulky on the neck strap. The homemade fleece muff was not perfect — the window needed a wipe between flights — but it stayed warm, the open bottom vent kept the fog manageable, and the zip-tie loops meant it stayed put during a clumsy hand-launch. Total material cost: £4.80, including a second-hand fleece and a pack of zip ties from the shed.

A club-night production line

This is a natural club-night project. One person brings a sewing machine, another brings a bag of charity-shop fleeces, someone else cuts PVC windows, and by the end of the evening half the membership has a muff. The pattern is forgiving, the materials are cheap, and the result is a genuinely useful piece of winter kit. It will not replace a heated transmitter bag for the really bitter days, but for the ordinary cold, damp, bright-blue British winter session, it earns its place in the flight box — and it leaves enough change from a tenner for a bacon roll on the way home.