Maxam

My Feedback: (62)

You may need to make your own out of thin brass. Make the inner hole 10mm id and the outer about 16mm. Thats what others did. -Tom

cymaz

Thankyou...I have checked it this morning and there is no grating or binding so mine should be OK???

Maxam

My Feedback: (62)

Yes I think so. Run it more to perfect tune and put it in your plane! -Tom

Joel_L

Hi Pete,

Any update on the collectors rings for the 735?

Thanks

Joel

rcten

Tom, Omega fuels, made by Morgan Fuels puts out a 12% (30% caster,70% syn.) oil, 10% nitro called 'Super T' which was originally made for Super Tiger engines. I run it in my 7 and 9 cylinder Technopower and Damo FS218 twin with no problem.

Maxam

My Feedback: (62)

I noticed all three glow versions of the Evo radials are sold out untill April! There must be a bunch out there so I hope to see a few flying at meets. My 160/Beast project is moving along so my next project will be figuring out what to put my 735 in. -Tom

BeasleyBunch

Is there any update on the collector ring' arrival timefor the EVO radials? I am in a holding pattern until I can get the one for my 9 99...

Thanks

cymaz

I was wondering what other UMS owners use as glow driver power???

I have one of [link=http://www.bing.com/images/search?q=Hawker+Cyclon+Batteries&view=detail&id=E5 38BA4D99CD8F19B0B9CDC825A0110B3CD74999&first=0&FOR M=IDFRIR]these[/link]

Joel_L

I have a couple of packs that are four 3Ah nicads in parallel.

nilsreinert123

I use a 10 000 mah nimh 1.2v battery from Tenergy , i do not plan to use onboard glow on my 7-35.

I have only run it on regular 15% oil 5% nitro fuel as i have not received the methanol and oil i ordered yet. will receive it on monday. I am looking forward to try it with the correct oil mix ! It should run better on it.

Also i have had success in making my own collector ring for it , it was actually a rewarding job!
I made it from copper and brass tubes hard-soldered together with copper-phosphorus rods. The brass tubes are thin walled and slides on to the stubs that came with the engine , the other ends are soldered to the copper ring which ends at the bottom in two outlets.
I shaped the outles like trumpets to try to make it sound louder. Will test it when i get the metanol

Maxam

My Feedback: (62)

Pictures Nils!! Oh there they are. I used to play the French Horn! -Tom

cymaz

Nice one Nils........ever thought of building a French Horn for your next project

Linkan2

<span id="result_box" lang="en"><span class="hps">Here's my</span> <span class="hps">UMS</span> <span class="hps">7-35</span> <span class="hps">with</span> <span class="hps">exhaust</span> <span class="hps">ring</span><span>.</span>
<span class="hps">a very nice</span> <span class="hps">sound
http://www.youtube.com/watch?v=o9adZ3e2cL0

Lars<br type="_moz"/></span></span>

Maxam

My Feedback: (62)

Lars, That sounds great! Nice deepened tone. Looks real cold out there in the snow..Now we wait for the flying season. Gotta go and work on my Beast........Tom

Linkan2

<span id="result_box" lang="en"><span class="hps">Yes</span> <span class="hps">it's been</span> <span class="hps">cold</span> <span class="hps">here</span> <span class="hps">down to -20</span> <span class="hps">degrees.</span> <span class="hps">Today,</span> <span class="hps">when</span> <span class="hps">tested</span> <span class="hps">motor</span><span>, it was</span> <span class="hps">-4 degrees
Lars<br type="_moz"/></span></span>

nilsreinert123

Hehe maybe i should try

Maxam

My Feedback: (62)

Yeah Nils!! You will not overheat it. You could
start it in your garage and then open the door. I have done that before. -Tom

nilsreinert123

I had to use a hair dryer to warm up the engine to start it ,because it was so cold here , -3 celsius.

Had no chance to get it started without warming , but it might also be because i used "fat" fuel and have not optimized the needle and idle settings.

Lars; how did you start it in the cold?

Linkan2

<span id="result_box" class="short_text" lang="en"><span class="hps">Nils</span>
<span class="hps">I used the</span> <span class="hps">electric start</span> <span class="hps">on my
Lars<br type="_moz"/></span></span>

cymaz

You lot are a hardy breed. Here in the south west of the UK I got to start mine by hand but it was a warm +7C. Tropical by your standards.

Maxam

My Feedback: (62)

You guys are true dedicated modelers! I have gotten a bit old for that but I used to fly on the snow below freezing. Now give me at least 60 F or 18C. Any new project pictures? That one project of a plane converted to a crop duster is quite interesting. -Tom

cymaz

I have built the crop duster with the UMS7-777

Maxam

My Feedback: (62)

Right, right, Thats the one. Thanks for reminding me. Looks like the gear pivots for smooth landings. Keep the pictures coming and a flight report would be interesting! Thanks Cymaz. -Tom

slskn

My Feedback: (4)

OK guys just got my UMS 999 and now looking for fuel to use, I use WildCat fuel for all my 4 strokes I called them and the closest fuel they have for My 999 is 10% oil(synthetic) and 10 % nitro, will this be good for the breaking in, and for normal use? or should I cut down on the oil content? I plan on putting this engine on my Ziroli corsair, I was fling this on a 3 cyl. Saito 450 flew it OK but hoping to have a little more power with the 9cyl. also wondering what prop to use, want to use a 3 or 4 blade? thanks

cymaz

Hi Maxam,
Hope to do some taxi trails this Sunday. Will report back asap.