The FoldApe4 at $62.99 is a 4-inch carbon fiber FPV frame with folding arms in the analog version. Folding arms pack the quad small for travel and open for flight. You add motors, a flight controller, an ESC, a camera, and a video transmitter. The frame suits a 4-inch analog freestyle build.
Why fold the arms?
Folding arms pack the quad small for travel and open for flight.
A folded quad fits a small bag without removing props or parts.
The frame takes 4-inch props, so check prop clearance each time you unfold the arms.
What is the analog version?
The analog version takes an analog camera and video transmitter.
The listing names the FoldApe4 as the analog version frame, so plan analog video gear for it.
Analog video gear costs less than digital gear and suits a first 4-inch build.
What parts fit a 4-inch frame?
A 4-inch frame takes 4-inch props and motors sized for that prop size.
Add a flight controller, an ESC, a camera, and a video transmitter to the frame.
Check the frame mount size before you order a stack, so the board holes line up.
How does the FoldApe4 compare with fixed frames?
The BabyApe II frame at $57.99 is a fixed 3.5-inch frame kit for a builder who owns parts.
The MOZ7 at $219.99 is a fixed 7-inch frame kit for long range flight.
The Apex 5 at $52.99 is a fixed 5-inch frame kit, 225 mm, with 5.5 mm arms.
What did we check on the bench?
We checked the listing states a 4-inch carbon fiber frame in the analog version.
We counted 8 images on the listing, and the hero image shows the analog version frame.
We matched the frame size to the listing name, not to a seller claim.
Quick comparison
| Frame | Size | Type | Version | Price |
|---|---|---|---|---|
| FoldApe4 | 4 inch | Folding frame | Analog | $62.99 |
| BabyApe II | 3.5 inch | Frame kit | Frame only | $57.99 |
| MOZ7 | 7 inch | Frame kit | O3 and O4 Pro | $219.99 |
Steps
- Unfold each arm and lock it open.
- Check each hinge by hand for play.
- Check each prop spins free.
- Check the stack screws are tight.
- Run a short hover test before normal flight.
Frequently asked questions
Do the arms fold in flight?
No. Lock each arm open before flight and check it by hand. A loose arm changes how the quad flies.
Does the frame include motors?
No. It is a frame only. Add motors, a flight controller, an ESC, a camera, and a video transmitter.
What video gear fits the analog version?
Analog cameras and video transmitters fit it. Plan analog gear, not digital, for this version.
How do I carry a folded quad?
Fold the arms and pack the quad in a small bag. Check the arms and props before the next flight.
Parts used
DarwinFPV FoldApe4 4 Inch Carbon Fiber FPV Frame : Analog Version, $62.99
DarwinFPV BabyApe II 3.5 Inch Freestyle FPV Frame Kit : 156mm Carbon Fiber, $57.99
GEPRC MOZ7 7 Inch H-Frame Long Range FPV Frame Kit : O3/O4 Pro Compatible, $219.99
APEX 5 5-Inch Carbon Fiber FPV Frame Kit, 225mm, 5.5mm Arms, $52.99
Related buying guides on Quality RC Parts
How to Build on the FoldApe4 4-Inch Folding Frame
FPV Drone Frames for 5-Inch Builds
Browse all the guides on the Quality RC Parts Drone Guides hub, or start at the Quality RC Parts store.
Sources
Quality RC Parts stocks parts in New York, USA and ships in-stock orders in 1-2 business days.
Last updated: 2026-11-10.