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Standoff length for DA-50?

 
Old 03-23-2006, 11:07 PM
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JustABigKid
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Default Standoff length for DA-50?

The DA-50 I ordered for my 85" Yak came with the 3" standoffs. I'm thinking that these should give the proper cowl clearance without using the wood blocks that come with the kit. Sound right?
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Old 03-23-2006, 11:12 PM
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Default RE: Standoff length for DA-50?

It's close. I used the 3" DA standoffs as well and everything worked out fine. They are 1/4" inch back from what it would be using the blocks but it puts it exactly where the 3W would be I believe.
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Old 03-24-2006, 12:36 AM
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Default RE: Standoff length for DA-50?

Yes that's right 3" stand offs with no wood blocks for Yak 85" and DA50.

Thank you,
Reza
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Old 05-06-2006, 12:35 AM
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Default RE: Standoff length for DA-50?

Hey,
If you are online I sent you a pm regarding my situation. I dont know if this might get to you quicker but I would like to know how you like the qq 50 and if you think a 3w 50 would work as well on the plane as a da 50. I am having a hard time deciding on which yak to get. I like the qq but there are othe yaks to choose from. Tough decision. Hope you can help.
Thanks
DARREN
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Old 05-06-2006, 01:28 AM
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Default RE: Standoff length for DA-50?

Darren,

Replied to your PM. Yes, 3W 50 will be fine!

Thank you,
Reza
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Old 05-06-2006, 11:53 AM
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Default RE: Standoff length for DA-50?

Rezagh

Can I get the 85" Yak in the UK if so where from, or how much is the shipping to the UK.

Thanks in advance
Mike
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Old 05-06-2006, 02:16 PM
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Default RE: Standoff length for DA-50?

Hi Mike,

I think you can.Please email Wayne at [email protected] He will get you shipping cost too. I know we have shipped them to Europe and Canada so you should be able to get one there too.

Have a good one,
Reza
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Old 05-08-2006, 05:56 AM
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Default RE: Standoff length for DA-50?

Rezagh

Unable to open e-mail site in last post, could you possibly get them to e-mail me at [email protected] it would cut out any problems as I could then just reply to them.

Thanks
Mike
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Old 05-09-2006, 11:14 AM
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Default RE: Standoff length for DA-50?

Rezagh

Thanks for your help on obtaining the YAK will pick one up at Sandown Model Show.

Mike
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Old 05-09-2006, 11:31 AM
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Default RE: Standoff length for DA-50?

Rezah

Can I put a decent silencer on the YAK i.e. a quite pipe or canister silencer in the fusalarge back from the cowl.
Mike
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Old 05-10-2006, 09:54 AM
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Default RE: Standoff length for DA-50?

Mike,

No, plane is not designed for Canisters. We are thinking about having one that accepts canister in near future but not until the end of summer.

Thank you,
Reza
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Old 05-10-2006, 10:28 AM
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Default RE: Standoff length for DA-50?

Rezagh

In that case what can I put on a DA50 to keep it at a sensible noise level that will fit?

Mike
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Old 05-10-2006, 10:31 AM
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Default RE: Standoff length for DA-50?

Mike,

What's your noise limit that you need to meet. I have personally extensive experience to quit down DA50 with various props. After all DA50 is not that noisy. Let me know what the noise limit is at what distance and I will share my experience with you.

Thank you,
Reza
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Old 05-11-2006, 11:06 AM
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Default RE: Standoff length for DA-50?

Rezagh

Its not a noise limit that is the problem its me, I am very environmentally aware and therefore like to keep my personnal contribution to noise at a minimum level, polution of any kind is unacceptable if it can be avoided and we are capable of quitening our engines down without any loss of enjoyment or performance therefore I personnally find it unacceptable to make unneccesary noise, so that leads me to want the quitest set up I can get as we all should endevour to do. It needs a manufacturer to lead the way in this especially in the US perhaps you could be the one that starts the US into its awareness of this. No hidden agenda in this as the Uk is just as guilty in some respects.

Evan as a teenager I would make my motorbikes as quite as possible, but then it was to stop the attention of the police, I went through the whole of my teenage angst without a speeding ticket even though I was always with or in front of my peers.

Mike
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Old 05-11-2006, 11:26 AM
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Default RE: Standoff length for DA-50?

Mike,

Use Carbon Fiber Mejlik 21-11 1/2 3 bladed prop and it will be really quit with very good perfromance. You'll even have one more inch extra clearance. Hope this helps. I have tried it and it's really quit in the air. As a rule of thumb higher pitch, lower diameter will give you less noise.

Good Luck,
Reza
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Old 05-11-2006, 04:39 PM
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Default RE: Standoff length for DA-50?

Quiet models do wonders for retaining a flying field too... Nothing worse than upset neighbours.

This is one reason why I now use soft mounts on all my engines.. Helps reduce airframe noise. I'm not sure soft mounts are available for the big gas engines though but they're widely used in pattern ships.

The brand of prop and tip shape can make a hell of a difference too.

Go to this site [link=http://www.bolly.com.au]Bolly Props[/link] and look at the bolly book online. Some good tips on prop selection etc.

Regards
Quik.
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Old 05-12-2006, 04:50 AM
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Default RE: Standoff length for DA-50?

Thanks for your input guys, I am probably going to go for an MVVS 58cc pro engine as I can keep the throttle further closed than with a 50cc and so reduce the noise even more one of the guys on the QQ 85 Yak forum is using one but it looks as though he uses it at full bore most of the time physical size and weight seems to be about the same as DA50R but with 8HP so should not be a problem for fitting and with all that power to absorb a three or four blade prop at high pitch should quiten it down even more.

Again thanks for your help all especially Rezagh and quiktrade for the link to Bolly.

Mike
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Old 05-15-2006, 04:13 AM
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Default RE: Standoff length for DA-50?

Rezagh

Would you be so kind as to measure the dia of the cowl so that I can see what size boxer engine I can get in.

Mike
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Old 05-16-2006, 10:05 AM
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Default RE: Standoff length for DA-50?

Mike,

9 3/4" but in the middle can be around 9". Remember if you are planning to use a twin cylinder engine, it's probably not a good idea. It might be too heavy for this size plane. Also most likely you have to cut the sides of the cowl for spark plug caps to stick out.

Reza
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Old 05-16-2006, 10:12 AM
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Default RE: Standoff length for DA-50?

back to the standoffs....

I used the 2.5" standoffs WITH the wood blocks with my DA.... as per the original directions... should I change it out or just leave it as is?

it flies fine, so I'm thinking just leave it....but wanted to make sure
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Old 05-16-2006, 10:16 AM
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Default RE: Standoff length for DA-50?

Hi There,

Your engine probably is sticking out a little more than 3" stand off which actually helps you balance your plane without having all the batteries way up front. Leave it as is. There is really nothing to be concern about. Have fun flyin it.

Thank you for your question,
Reza
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Old 05-16-2006, 11:20 AM
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Default RE: Standoff length for DA-50?

Rezagh

Thanks but I do not like the amount of engine that sticks out of the bottom of all the Yak's I have seen so far, a boxer engine is shorter from the crank too the cyclinder head for a given displacement due to it only having to be 25cc per cyclinder, the ROTO 50V2 is only 214mm from cylinder top to cylinder top thats 81/2" in imperial so the only projection would be the plug caps. The problem with weight is that not all manufacturers measure the weight the same way, most will weigh without the prop nuts and bolts prop drive washer, plug and ignition to get the lightest weight on their web site they can, its only in forum like this that you can get the true weights of comparable engines, to that end anyone weighed any of their engines in true flight condition? i.e. with all the bits needed to run without mounts.

Mike
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Old 05-16-2006, 12:37 PM
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Default RE: Standoff length for DA-50?


ORIGINAL: Rezagh

Hi There,

Your engine probably is sticking out a little more than 3" stand off which actually helps you balance your plane without having all the batteries way up front. Leave it as is. There is really nothing to be concern about. Have fun flyin it.

Thank you for your question,
Reza
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it always seemed a bit far out... but it flies GREAT... so it is staying!
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Old 05-17-2006, 07:50 AM
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Default RE: Standoff length for DA-50?

Rezagh

In Quique's flying manual he says that the ZDZ80cc twin would be a good choice is this any lighter than the ROTO is this now a defunct recommendation?

Mike
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Old 05-17-2006, 08:54 AM
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Default RE: Standoff length for DA-50?

I need to talk to Quique about that. I have seen people flying with ZDZ 80 single but not the twin. I can't get back with you on this until next week. I will be gone from Tomorrow until Monday. I enjoy the way plane flies with DA50. Unless you are really in high elevation, I don't see a reason to make the plane heavier unless you have an engine that you want to use for this plane. Anyway, it's pilot's choice but if you are looking for a plane that flies extremely light, responsive and with almost no stall charecteristic, keep your plane under 16 1/2 lbs.

Thank you,
Reza
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