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Bendix King RMI KI 229 & Aspen EFD

Well, I have it and some procedures in Europe still require it. I wouldn’t spend any money on fixing it in case it broke.
The RMI for VOR/GPS I use a lot. I consider it IFR-fun.

If you have an ADF-only indicator and an efis of some sort then I would definitely move the ADF indicator to the RHS.
My EDM900 is going LHS as well.

EBST, Belgium

May I ask what your use case for the ADF is? I am about to ditch mine to make room for an EDM900 on the LHS panel. Could probably move the indicator to the RHS panel, but haven’t found a compelling reason.

tmo
EPKP - Kraków, Poland

For the price of a Sandel I’d upgrade the E5 to a Pro and have dual pointers. I’d move the ADF to the right just to have it installed.
A Sandel AND an Aspen seems overkill. I assume the KI229 will just work like a regular fixed-card indicator without the synced hdg ?

Last Edited by airways at 28 Mar 21:20
EBST, Belgium

What you could do is replace the KI525A with a Sandel SN3500 but retain the KG102A/KMT112. This will the allow you to drive the KI229 compass card. However with both the Aspen and Sandel, you can display bearing pointers, so is there any benefit in keeping the KI229?

Avionics geek.
Somewhere remote in Devon, UK.

Bugger :-/

EBST, Belgium

airways wrote:

can you remove the KI525 without losing the functionality of the RMI (leave the KI102A, lose the KI525)

No you can’t. The heading bootstrap synchro which sends the data to the RMI is inside the KI525A.

Avionics geek.
Somewhere remote in Devon, UK.

That would be great. I have no problem keeping the ADF but I don’t want to pour any additional money in its operation.

EBST, Belgium

Unfortunately I can’t answer that without wading through a load of circuits which I last saw in 2013, but I think the answer is Yes. The KI229 gets the bearing from the KG102A, the ADF needle comes from a KR87 ADF or some such, and the VOR needle comes from a box like a KN72 which takes the composite nav signal from a KX radio and converts it to a X/Y/400Hz format. So the KI525 HSI probably doesn’t do anything for the KI229.

On my plane I replaced the KI525, the KI229, the KA52 slaving accessory and the MD26 with the Sandel SN3500, and 1 year later replaced the KG102A and the fluxgate with the Sandel SG102 AHRS. It’s really high grade stuff but probably few are interested in using it for a new installation, because it’s not cheap. That said, I see a lot of these coming up on US Ebay as people put in “all glass”.

Administrator
Shoreham EGKA, United Kingdom

@Peter can you remove the KI525 without losing the functionality of the RMI (leave the KI102A, lose the KI525) ?

EBST, Belgium

usually the crappy unreliable MD26-28

Better to put that money towards an ACU 2 then.

EBST, Belgium
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