Thread Tools
Feb 26, 2020, 12:25 AM
Registered User
toad007's Avatar
I like the looks of the .049 plane. sweet lines
Sign up now
to remove ads between posts
Feb 26, 2020, 01:02 AM
Nitro User
1/2A Nut's Avatar
Thread OP
The Velocity should do well with glow power.

Wing Span - 30 in
Wing Area - 125 sq.in.

I flew the .09 Dart at 106 sq. in. it requires to keep a bit of
speed up during landing / even more so down wind.

I bet a Norvel .074 to TD .09 would be a good power plant for a speedy Velocity.
The Medallion .049 should do well with a APC 4.75 x 4.5EC (carbon)
A 4.5x4.1E if the engine is lagging hauling the size / weight of the plane.
Feb 26, 2020, 11:55 AM
Pro Hoarder
turbonut's Avatar
I will try it with the TD 049 first ..If I dont stuff it in I can try a 09 later
Latest blog entry: In flight
Feb 26, 2020, 12:03 PM
Registered User
toad007's Avatar
you wont stuff it, I seen a vid of ya flying,
Feb 26, 2020, 12:28 PM
Pro Hoarder
turbonut's Avatar
Well thanks..there is a few vids of me stuffing in planes
Latest blog entry: In flight
Feb 26, 2020, 11:20 PM
Nitro User
1/2A Nut's Avatar
Thread OP
Picked this up on ebay for a reasonable price 48 + 8.25 for shipping & tax.
Bit of a battle 20 bids 11 folks scrapping for it. Wanted it for my VA collection.
Never ran still in the box. The other reason was so much written documentation to read.

Feb 27, 2020, 10:17 AM
Registered User
Roll Your Own Timing . User adjustable timing. Just how does that work?
Feb 27, 2020, 10:17 AM
Registered User
I got one of those when they first came out. Ran it once to test. It seems good. I have not used it because I did not want to loctite the piston adjustment collar. Just seemed wrong. Pretty good deal you got there. The Mk 2 would be on my list too.
Feb 27, 2020, 10:22 AM
Registered User
Quote:
Originally Posted by PilotPin
Roll Your Own Timing . User adjustable timing. Just how does that work?
Maybe Brad will show the page on here. There is an adjustment threaded collar inside the piston to raise or lower the height of the piston to change the timing for the desired rpm range.
Feb 27, 2020, 10:28 AM
Registered User
The VA .020 review shows how it's done. https://www.rcgroups.com/forums/show...postcount=1380
Feb 27, 2020, 10:30 AM
Registered User
toad007's Avatar
I have 4 mkII's, Im getting one ready to send to canada for a good friend . The other 3 I hope to wear out . My favorite Non bb 1/2a
a few yrs back, most the racers here used them or the Norvel , So light. Anyway if I remember righ, they seemed to last about 2 seasons, we would race 8-10 events a yr. 3-5 heats each event, plus practice. The Norvel could keep up if modified. Great little motor.
Feb 27, 2020, 10:34 AM
Nitro User
1/2A Nut's Avatar
Thread OP
Yes will be saving the pages on this thread for folks to review and source in the future.
I plane on setting the timing at 165 - 170 for pipe use.

The engine is low weight so has some use with a future project.
Feb 27, 2020, 10:36 AM
Registered User
toad007's Avatar
I set mine at 160-165 no pipe
Feb 27, 2020, 10:40 AM
Nitro User
1/2A Nut's Avatar
Thread OP
Thank you Mel,

The MK II are nice Kris has RC version will have to read up on it.


Thank you Alan,

I will have to deal with the same decision. I have some Loctite 638,
perfect for setting it once and forgetting about it.
Last edited by 1/2A Nut; Feb 27, 2020 at 10:56 AM.
Feb 27, 2020, 11:23 AM
Registered User
Quote:
Originally Posted by aspeed
Maybe Brad will show the page on here. There is an adjustment threaded collar inside the piston to raise or lower the height of the piston to change the timing for the desired rpm range.
Close-it's a threaded sub-piston that can have shims put on top and then the piston screwed down onto it. Different coefficients of expansion of different materials between the piston and sub piston keep it together.

That is, until you put an RC carb on it and the engine runs cool, where it unthreads and stops. at TDC.


Quick Reply
Message:

Thread Tools