new vs old rotax's

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Postby jb88ci » Thu May 13, 2004 3:32 pm

I learned a little something new today.

The newer Rotax 185 pistons use L-shaped top ring. This top ring and the Rotax 377 top ring are the same (p/n: 215 210), but the bottom rings for those two engines are different.

The rectangular bottom ring on the newer pistons is the same as the rectangular rings used in both positions of the older pistons. The newer L-shaped rings are $40 a pop, don't bust them.
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Postby flyalaz » Mon Jan 17, 2005 11:44 pm

A recent tour on the shop floor of Wildfire led me to about 50 or so motors lined up in a couple of rows, where I also noticed that the hole for the decompression valve is also missinig from the cylinder. Function deleted!
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Postby lazair3ca » Tue Jan 18, 2005 7:51 am

My engines had new pistons installed with the new rings. Perhaps someone on the list can let us know whether the new ring needs a new piston.
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Postby lazair3ca » Thu Mar 31, 2005 9:19 am

When you order a decompression valve from Wajax Wildfire sends the decomression valve on the right. The original one is on the left. The original one is nolonger available from Wildfire. It is an OEM item that the manufacturer will not ship to individuals.
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Postby lazair3ca » Thu Mar 31, 2005 9:22 am

Test stand for checking out changes to the engines
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Postby jb88ci » Thu Mar 31, 2005 11:52 am

what is C-IHM? covered with??

I'm just starting my re-cover...both ruddervators now have fabric on them. I'm going with ultralight fabric, attached with polytak and latex paint. I'm going to use rivets and capstrips and probably (on the advice from the falcon guy) put some rivets along the top of the D-cell, under the tape in case i get peeling.....

I'm thinking about primary yellow with primary orange wing tips....I used to work in a Search and Rescue Squadron....our Twotters were that colour.
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Postby ozzie » Thu Mar 31, 2005 5:00 pm

could someone with prince props please post a photo of them and some measurments and/or a contact for the manufacture thanks OZZIE
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Postby lazairiii » Thu Mar 31, 2005 6:32 pm

Ozzie,

Here are some pics compared to the bi-prop. But I don't have measurements.

George Curtis
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Postby lazairiii » Thu Mar 31, 2005 6:33 pm

And another...
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Postby lazair3ca » Fri Apr 01, 2005 2:07 am

jb88ci @ Mar 31 2005, 12:52 PM wrote: what is C-IHM? covered with??

I'm just starting my re-cover...both ruddervators now have fabric on them. I'm going with ultralight fabric, attached with polytak and latex paint. I'm going to use rivets and capstrips and probably (on the advice from the falcon guy) put some rivets along the top of the D-cell, under the tape in case i get peeling.....

I'm thinking about primary yellow with primary orange wing tips....I used to work in a Search and Rescue Squadron....our Twotters were that colour.


John,

C-IHMS is cover with a light fabric. I don't know what type or weight. It was covered a decade before I bought it. It has is still good after many years. It is covered with a pait that may be a CTC special. As reported by one of the fellows thaat was around at the time it was originally flown. There are no capstrips on C-IHMS. The fabric is rib stiched at each rib in the inner panel. Rib stiching ensures that the fabric follows the profile of the ribs especially the under cut bottom portion.
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