These Digital/Graphic Instruments are solid state and hold their accuracy over time and a range of environmental conditions. The colorful Graphic Analog display emits green, yellow, or red light enabling the pilot to spot problems immediately without interpreting a needle. The Digital display constantly provides an exact indication of each instrument function. Gauges mount in 2-1/4" instrument holes. These instruments (except fuel level) are STCd & TSOd for certificated aircraft. |
The R-1 is a precision RPM instrument featuring a 210 degree graphic analog display and a full four-digit digital display. The 10 RPM resolution allows for precise RPM settings. The R-1 features a tach time recorder which records the time the engine is operated over 1300 RPM as well as an automatic flight timer which records the time starting when RPM reaches 2000 (takeoff) and then drops below 2000 (landings). Installation of the R-1 is simple. It connects to the mag. lead through isolator and requires no cables. It is backlit and operates on 12-24volt systems. Wt. 10 oz. Max. Digital Range 5000 RPM. Accuracy 1%. Specify red line, yellow & green arcs, and magneto models, as well as aircraft make & model.
E.I. products include all documentation and certifications
R-1 Configuration Worksheet (Required for Order)
Customer support member will reach out for completed worksheet after order is received.
WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov.
Very satisfied! I installed one in my Grumman Yankee it works very well. I just ordered a second for the Grumman tiger project.
Works fantastic in my Pitts S-2B. As an added Bonus: the factory can program your tach time in the total time of the device and ship it to you. Having two tachs with the same, and accurate tach time is awesome.
After some errors and confusion during the order process, EI reached out and was more than willing to rectify the situation. Good customer service, friendly and knowledgeable staff. As for the unit, Ive had it installed for just over 6 months now and have zero complaints. It is superior to the factory mechanical gauge in every way. Run ups are easier and fine tuning engine speed during cruise has never been easier. My experience with this unit has led me to purchase additional instruments made by EI.
I’ve bought these twice and love them. Many people don’t realize that old faces in old airplanes are usually about 200 rpms off, they die a slow death. This is highly accurate and was about a 90 minute DIY project with supervision.
Drop shipment arrived earlier than expected.. Thanks to aircraft spruce and electronics international
Easy to see and operate. The mag drop feature works well. Takes some getting used to looking at a number instead of a needle. The lights help though. Installation took the avionics tech about three hours. No surprises at all. My only complaint is that the instrument doesn't come in 3-1/8 size. The included adapter plate worked well though.
Very disappointed. I bought this for a stock PA-34/200 Seneca. They are not plug and play. The tachs are almost 2 inches longer than the mechanical and the right tach will not fit in the mounting as it conflicts with the parking brake handle. So you would have to let the tachs extend about an inch out of the panel. This is not noted on the installation instructions nor advertising.
Mine is about 3 or 4 years old and has become sensitive to humidity as it reads a very high number - even when the engine isnt running. I called customer support and they said that it can be resealed for $125. EI equipment is only warrantied for 1 year. I would think that my problem is based on defective materials, workmanship or design. The factory new unit didnt last long and there was no mention as to how long resealing would last. Theyve been making these units for quite a few years and this is a known problem.
Please note, Aircraft Spruce's personnel are not certified aircraft mechanics and can only provide general support and ideas, which should not be relied upon or implemented in lieu of consulting an A&P or other qualified technician. Aircraft Spruce assumes no responsibility or liability for any issue or problem which may arise from any repair, modification or other work done from this knowledge base. Any product eligibility information provided here is based on general application guides and we recommend always referring to your specific aircraft parts manual, the parts manufacturer or consulting with a qualified mechanic.
Yes, the R-1 only comes in a 2-1/4" gauge.
The EI RC1 Cap is used to cap off an existing oil pressured mechanical tachometer cap drive line so oil isnít spilled when replacing the new electric tachometer.
Per EI, since this an electronic tachometer, this does not use a drive cable. This picks up the pulses from the magnetos which you tell you your RPM information. You can easily connect 2 of these electronic tachometers at the same time.
Yes, The STC list can be found under the documents tab for the EI R-1 (10-25200)
Specify red line, yellow & green arcs, magneto models, engine model, and aircraft model. Current tach time can also be preset to reflect current time.
Yes, please see page 4 of the manual posted under the documents tab for mag drop procedure.
Yes, 1 amp circuit breaker is recommended.
Yes, an adapter plate for a 3-1/8" hole is included with this unit.
The E-1 is TSO approved and can replace your current primary tach.
When you place the order for the R1 you will be asked for the type of ignition system. Per EI: the -LM version of the r1 will support the Electroair electronic ignition.