JBA Nitro Airplane Engine 120AR

Type: JBA 120AR

Displacement: 19.79cc
Bore (mm): 30.4
Stroke (mm): 28
Output (hp/r.p.m): 3.1/17000
Crankshaft: 3/8 x 24
Weight (oz) : 33.09
Recommended prop size: 15 x 8
Practical range: 2500/8700

Includes:
1 x engine
1 x muffler
1 x manual

* Glow plug is NOT included.

Average Customer Review: 4 stars

3 customer review(s). [Write a review/question]

1****bvv

Grade:

Глушитель менять не надо.просто уменьшить диаметр выхода вставлением трубки.как вы хотите.
April 08 2017 Was this review helpful to you?

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f****g

Grade:

I have installed this engine in a VMAR Mig-21 (4.3kg). Much difficulty in tuning the engine in the side mounted configuration, but performance thus far is satisfactory never-the-less and reliability is fine.

The additional performance of the JBA 1.20 is welcome compared to the ASP .91 previously installed, although at the cost of higher fuel comsumption. The JBA 1.20 uses most of a 16oz tank in a single flight of the Mig-21, approximately 7 minutes.
February 07 2013 Was this review helpful to you?

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s****an_pratt
STD member

Question :
Hello.
Is this a ringed or "ABC" engine?
January 17 2012 Was this question helpful to you?

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Discussion of this question:

AR means ringed in the part number.

-- Jan 26 2012 by p****ay55

I have several JBA engines. The engines are good, but the mufflers need to be modified i.e. to make the exhaust hole to a smaller diameter to give more pressure to the fuel tank otherwise the engine would stall easily during flights. The engine would become more powerful too. This is my experience. I did the same thing to a Tiger Shark .91AR engine, the rpm becomes more reliable.
-- Feb 28 2013 by t****8

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