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Search: Posts Made By: Robert Dochterman
Showing results 1 to 14 of 14
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Forum: Gas Engines
04-13-2024, 04:59 PM
Replies: 303
Views: 54,613
Posted By Robert Dochterman

i tend to easy on the throttle and try to be kind...

i tend to easy on the throttle and try to be kind to the engine. I use a throttle curve and linkage geometry to obtain a uniform throttle response. Some Walbros tend to actlike a two speed...
Forum: Gas Engines
04-13-2024, 04:42 PM
Replies: 303
Views: 54,613
Posted By Robert Dochterman

Is it effective? Temperature difference?

Is it effective? Temperature difference?
Forum: Gas Engines
04-13-2024, 04:18 PM
Replies: 303
Views: 54,613
Posted By Robert Dochterman

I'm a long-time modeler but new to radials, and I...

I'm a long-time modeler but new to radials, and I wanted to share what I've learned. I have a UMS 5-100, and it is of excellent quality, runs well, and sounds awesome. Support from Adrian at CH...
Forum: Gas Engines
04-13-2024, 03:39 PM
Replies: 303
Views: 54,613
Posted By Robert Dochterman

I'm a long-time modeler but new to radials, and I...

I'm a long-time modeler but new to radials, and I wanted to share what I've learned. I have a UMS 5-100, and it is of excellent quality, runs well, and sounds awesome. Support from Adrian at CH...
Forum: Gas Engines
04-09-2024, 03:34 PM
Replies: 303
Views: 54,613
Posted By Robert Dochterman

Interesting about the rpm. Factory test took it...

Interesting about the rpm. Factory test took it to 5500 as is the max listed in the instructions. Not an issue for me as I'm a fullscale pilot and always pull some power if the nose is down. I'm...
Forum: Gas Engines
04-09-2024, 02:54 PM
Replies: 303
Views: 54,613
Posted By Robert Dochterman

My UMS 5-100 has a gallon of fuel thru it and...

My UMS 5-100 has a gallon of fuel thru it and runs beautifully. Now I'm ready to increase from the breakin maximum rpm 4000 to 5500. At 4000 the cylinder temp is 225F. I know increasing the rpm will...
Forum: Gas Engines
03-23-2024, 06:08 PM
Replies: 303
Views: 54,613
Posted By Robert Dochterman

All sounds good. I'll keep everyone informed how...

All sounds good. I'll keep everyone informed how it does.
Forum: Gas Engines
03-23-2024, 04:56 PM
Replies: 303
Views: 54,613
Posted By Robert Dochterman

All clear except my engine does not have a...

All clear except my engine does not have a provision for six bolts, just a 10mm nut. I guess just locktite the prop spinner hub would be the best i could do?
Valve clearances set warm or cold?
And...
Forum: Gas Engines
03-23-2024, 12:36 PM
Replies: 303
Views: 54,613
Posted By Robert Dochterman

Ums 5-100

After reading all the comments and especially Maxam i received my UMS 100 today. Absolutely beautiful and an easy transaction thru CH Ignition. I've been in the hobby and fullscale for 30+ years but...
Forum: Gas Engines
03-06-2024, 01:56 PM
Replies: 303
Views: 54,613
Posted By Robert Dochterman

And so for my 5th post to allow me responder...

And so for my 5th post to allow me responder privileges.
I want a radial in a 5 cylinder configuration running gasoline.
My first choice was the Saito FG73r5. What worried me was weekly posts on...
Forum: Gas Engines
03-06-2024, 01:31 PM
Replies: 303
Views: 54,613
Posted By Robert Dochterman

Thanks to Maxam for your pm reply info. I...

Thanks to Maxam for your pm reply info. I couldn't reply till i get my newby 5 post requirement.
Forum: Gas Engines
03-06-2024, 01:27 PM
Replies: 303
Views: 54,613
Posted By Robert Dochterman

UMS 55 five cylinder

Has anybody have success running the UMS 55cc 5-Cylinder motor either stock or with a pumped walbro?
Forum: Gas Engines
03-06-2024, 01:24 PM
Replies: 303
Views: 54,613
Posted By Robert Dochterman

okcrcpilot, Thanks for the great info.

okcrcpilot,
Thanks for the great info.
Forum: Gas Engines
03-06-2024, 06:42 AM
Replies: 303
Views: 54,613
Posted By Robert Dochterman

Ums 55 or 75

Long time modeler and looking for my first radial.
I'd like to get the 55 but posts indicate it will need a pump and walbro carb to run properly.
The 75 is probably a better choice in that respect...
Showing results 1 to 14 of 14


 
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