SkyPilot101

Use a Prop Reamer, alternating from front & back sides untill the hole is opened up to fit your engine shaft.

wjcalhoun

Markh:
Never use a dremel to open up a hole that you expect to be concentric!!! Tools are made for specific purposes; dremels are good for many purposes, but enlarging a hole in a prop or backplate is not one of them. If you screw up your backplate, the balance of your prop/spinner will never be right. Think about it first! What if you get that hole off center??

Prop reamers work, but you are likely to have coarse control of the size of the hole, because they come in steps.

Better, get a micrometer, measure the diameter of the shaft, and select the proper drill bit to provide a few thousandths of clearance into the backplate. Invest in a good set of bits, 1/16 -> 1/2 by 32nds of an inch. One 32nd of an inch is about 30 thousandths, so with those drills, you will be able to come close. Total investment probably $60-70, and you will do it right. Check harbor freight, or northern tool. The right tool is almost always the right choice. Making do with a hack is almost always the wrong choice.

landeck

My Feedback: (1)

Use a prop reamer as others have suggested. I had the same problem and just a touch of the reamer fixed the problem.

Bruce

markhamregular

I am not that handy to take care of this by drilling the exact way. I used the prop reamer. Now it goes through but not very tight. I have other planes with back plates the same way. I think once I tightly screw the prop in, it will be fine. I may take it to the field before I brake in the engine to see what other experts at the field think about it.

Thanks a lot for all your input.

Granpooba

My Feedback: (5)

Wondering, what size throttle servo's you folks are using on your DLE-20's ?

I believe without running down to my work shop that mine is generating .66 oz of torque with carbonite gearing. This servo should be sufficient right ? Say YES, please !! As it is already mounted.

Granpooba

My Feedback: (5)

Let me just state right now " what a GREAT forum " and group of modelers !

Already have one R-70 flying, being pulled around by a Saito .91. Am in the process of finishing up my second R-70 with a DLE-20 mod. Was thinking about what model would come next, possibly a R-90 with a DLE-55. But after reading and viewing so many postings on this forum, I may just do a 3rd. R-70, incorparating some of mods you folks have talked about and shown.

Great Planes must be selling an awful lot of Revolvers.

ahicks

My Feedback: (2)

I'm not much on karbonite gears, but that said, I'll use about anything on a throttle servo!

microdon2

My Feedback: (47)

Granpooba - very cool that you love the Rev 70 as much as we all do. But have you been reading the RCU thread on the new Rev 90? You might want to reconsider. It's already getting rave reviews from the few guys who have flown it so far. I know it's on MY wish-list.

http://www.rcuniverse.com/forum/fb.asp?m=11287559

afjetmech

+1. I thought they would be fine on my Rev70 with DLE20. Wrong. Second flight one of the aileron servos stripped out. Bad servo? Maybe, but I replaced all four with metal geared before it flew again. Rebuilt the stripped one and used them on my Rev59 that is Epowered.

capt1597

i have read many times that if your using a gas engine you must use metal gears in the servos. i don't fly with gas. i am using a os 91 fx and went with karbonite gears as an experiment for myself. report to date is zero issues with over 500 flights on this bird. just one mans 2 cents. happy flying, capt

wjcalhoun

I put HS5625MG in mine; quick, and inexpensive - about $45. Has way more torque than necessary, but its digital, and metal gears.

Cactus463

Anyone out ther know of a source for longer throttle arms for the DLE engines-Anyone have pics of how the made longer ones?????

ahicks

My Feedback: (2)

Cut 3 arms off an unused 4 armed servo arm?

Slow and Steady

This is the link for a 50 cc 3 D Hobby Shops Extra build manual. Page 21 has a great method for the extended throttle arm. You may want to check it out.

http://www.3dhobbyshop.com/assets/im...TRA-MANUAL.pdf

Incidentally, I think the carb throttle screw is 4 40. Also, I typically use a metal gear servo for the throttle due to the engine vibration transmitted by the control rod. Or you can fly till it runs out of gas, if the throttle servo gears strip.

ahicks

My Feedback: (2)

That would also be one of the better reasons to run an opti switch?

microdon2

My Feedback: (47)

... and \ or a servo-controlled choke ...

Cactus463

Thanks for the info-will give ie a try

Slow and Steady

Choke servo, opti switch or Ignition Battery Eliminator Circuit. Have to have a remote way to turn off engine, without delay. Some radios also allow for a throttle cut off, which lets you trim down the throttle via a secondary channel switch.

ICEM@N

Hi guys , I´m back ! did not make the maiden flight yet !!! But now I bought a JR XG11 , and next week i will maiden my Rev70 !

SigMan

My Feedback: (21)

Larger Revolver ? there are 3 sizes now. which one does this thread pertain to ?

wjcalhoun

This is the middle sized, 70" R70 thread; the 50cc, 90", R90 is called 50ccRevolver

Luchnia

My Feedback: (21)

wj, they will need to change this thread name to, "Middle size Revolver"

wjcalhoun

OTOH, it is the 'larger' revolver, not the 'largest'
English teachers out there?

Luchnia

My Feedback: (21)

It is certainly larger that the small Revolver

What do we do with the other larger Revolver? Maybe that thread should be titled, "Largest Revolver to Date"

wjcalhoun

But it is smaller than the 'largest revolver'
So it could be 'smaller revolver' also