Dynam RC P-47D Thunderbolt

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P-47.JPG

The Dynam RC P-47D Thunderbolt is an all-EPO R/C scale electric warbird manufactured by Shenzhen Dynam Industry & Trade Co., Ltd. of Shenzhen, China. It is distributed in North America by online discount hobby retailer Nitroplanes of City of Industry, California USA and is available as a near-RTF version with a Dynam five-channel sport radio system and a Dynam 2200mAh 4S lithium polymer battery or as an ARF less radio and battery.

Both versions come with full hardware, a small phillips screwdriver, a 1.5mm allen wrench, a spare three-blade propeller, two tubes of contact cement, diecut pressure-sensitive decals and a predecorated pilot figure with its own foam-safe CA for mounting it. Servos are 9g analog versions from Dynam's Detrum brand.

Supplied as well is a small amplifier which plugs in between the ESC and receiver. This is intended to eliminate a stutter at the motor under low throttle applications and does in fact aid with smooth throttle control.

A notable feature of the model is a pair of preinstalled Dia brand self-contained retractable landing gear, which look and operate like those on the full-scale version.

Prototype

The model represents Hun Hunter XVI, a restored 1944 Republic P-47D with serial number 44-90460 and registered under US civil registration number N9246B. It served in the Brazilian air force between 1953 and 1958 at which time it was retired, stripped of parts and converted to a static display in front of Recibe AB between 1970 and 1987. The aircraft was shipped dismantled to the US in 1995 and returned to airworthy condition between 1996 and 1999. It is owned by Neil Melton of Lutrell, Tennessee and is on display at the Tennessee Museum of Aviation, Sevierville, Tennessee. It is regularly flown at airshows.

Flight characteristics

The overall flight characteristics of the P-47D are excellent. If high throttle at the recommended center of gravity causes the model to climb under power, moving the battery all the way forward and fine-tuning the elevator trim at the transmitter will solve the problem with no appreciable effect on the CG. Although the model is powered by a 4S lithium polymer battery, the top speed is somewhat reduced by the three-blade propeller.

Low speed handling is excellent as well. The P-47D exhibits no tendency toward tip stalling or a full stall at low speeds.

The radio provided with the RTF version has no provision for end point adjustments or exponential, resulting in somewhat limited aileron and elevator throw and quite a bit more rudder throw than recommended in the manual. A computerized radio system will allow for both more throw as well as exponential as shown in Nitroplanes' YouTube video linked below. That model is shown doing loops, rolls and inverted flight which are difficult to achieve with the stock radio.

The model in the photograph was flown with an off-the-shelf radio which allowed for the recommended throws, resulting in crisp, accurate rolls and loops.

Landings performed under gradually reduced power result in smooth three-point touchdowns.

Ground handling is excellent; unlike the similarly sized Dynam RC Messerschmitt BF-109, a wider track prevents the P-47D from plowing into turns.

Specifications

  • Wingspan: 48" (1220mm)
  • Length: 45.8" (980mm)
  • Wing loading: 18 oz/sq ft (55g/sq dm)
  • Flying weight: 53 oz (1500g)
  • Servos: Four Detrum 9g analog with two Dia 3.6 90 X self-contained retract systems
  • Battery (RTF): Dynam 2200mAh 25C 3S 14.4V lithium polymer with proprietary connector and JST-XH balancing plug
  • ESC: Detrum 40A brushless with proprietary connector
  • Motor: Dynam BM3720-A-KV500 brushless outrunner
  • Propeller: Dynam 13x7 three-blade electric
  • Transmitter (RTF): Dynam 2.4GHz five-channel sport radio with servo reversing, analog trims, aileron sub trim, non-proportional fifth channel for retracts and a throttle hold switch
  • Receiver (RTF): Dynam seven-channel with gear control channel and two auxillary channels
  • Operator skill level/Age: Intermediate/14+
  • Catalog number (both versions): DY8956
  • PNP/RTF prices through Nitroplanes: US$132.95/$199.00

External links and references