Weight and cost optimization on a drone program usually comes down to material choice, not clever engineering or an expensive process change. A bracket that drops 15% of its mass can buy back loiter time or free up payload. A frame that swaps material without changing geometry can do almost the same thing for a lot less than a redesign costs. Most of the gain is already sitting in the material dropdown, and the second-biggest lever, part consolidation, is close behind it: a bracket that merges a mounting plate and four fasteners into one print removes both weight and a point of failure in the field.
Filament choice is the cheapest lightweighting move you have
Our in-house fleet of FFF machines, more than 50 running now and scaling toward 90, prints the filaments drone builders already spec for themselves. PETG covers general structural use. ABS and TPU handle props and vibration-damping mounts. Nylon, carbon-fiber-reinforced nylon, and PETG-CF go on arms and frame rails, where stiffness per gram is the number that actually matters. PLA has a place too, but only for an early fit check. It prints fast and cheap, and it's also the first material to give out under vibration and heat, so treat it as a placeholder rather than a flight part.
Swapping a PETG bracket for CF-nylon or PETG-CF is usually the single cheapest lightweighting change available on a program. The part costs the same to print either way. What changes is strength per gram. Where impact resistance matters more than weight, in a housing that takes hits on landing, polycarbonate is worth a look before reaching for anything more exotic.
Infill is a setting on filament, a redesign on powder
On the FFF side, weight is partly a slicer setting. Infill percentage and wall count get dialed in per part: drop infill to 15 to 20%, or run a single perimeter wall with no infill behind it, and the part gets lighter without touching the CAD file. A single-wall shell works well for fairings, ducting, or cosmetic covers that don't carry real load. It's a real tradeoff though. There's no infill behind that wall to catch a bend or an impact, so it only belongs where the load path allows it.
Powder-bed systems don't have that setting. SAF and MJF don't apply a slicer infill pattern the way filament printing does, so a solid CAD model prints solid. Getting a lighter powder-bed part means designing the lattice or shell into the geometry itself. That's real engineering time, not a checkbox.
The redesign is worth it. Powder is its own support material during the print, so there's nothing to plan around or clear away afterward. That opens the door to fully enclosed lattices and walls as thin as roughly 0.5mm in the right geometry, features that would need internal supports (and be close to impossible to clean out) on a filament print. Done right, a redesigned SAF or MJF part can end up lighter than the filament equivalent, with material sitting only where the load path actually needs it.
When the part needs to be isotropic
Filament parts get most of their strength along the print direction, which is fine for a lot of drone components and not fine for a few. For parts that need full strength in every direction at production volume, powder-bed nylon is the better call. Three Stratasys SAF machines in our shop run PA12 and PA12 ReLife, a recycled-content nylon powder, and both come out isotropic: strength doesn't depend on which way the layers ran. HP MJF, our other powder-bed nylon process, gets you to the same place. MJF PA12 parts typically run around 97% as strong as an injection-molded equivalent, without committing to a mold or a minimum order.
PA12 ReLife adds a cost angle on top of that. It's reprocessed powder from prior production runs, priced lower per part than virgin PA12, which matters on programs where every line item on the bill of materials gets scrutinized for cost and carbon footprint alike.
Complex geometry doesn't carry a weight tax
On CNC or injection tooling, a lighter part is usually a more expensive one. More machine time, more tooling complexity, more setups. On MJF, SAF, or our FFF fleet, an internal lattice or a bracket that consolidates three fasteners into one print costs about the same as a solid block once it's designed. The printing itself doesn't punish complexity, even on the powder side where getting there takes real design time up front. That changes the math on lightweighting. The question stops being whether you can afford to make a part lighter and becomes why you wouldn't.
For the rare part that has to survive real heat, aggressive chemicals, or needs titanium-level strength at a fraction of forged metal's weight, we also run PEEK, Carbon PEEK, and ULTEM on a Roboze ARGO 500, plus Cold Metal Fusion titanium. Most drone hardware never gets there. Most of it just needs the right filament and a process that doesn't punish good design.
Send us the part, or the problem, and we'll tell you where the weight and the cost are still on the table. Talk to an engineer.